Roofing/Questions Answered by Expert Tom Petrilli

SubjectDate Asked
Roofing ridge cap with Timberline shingles12/31/2011
  Q: I am just about to finish roofing a shed with Timberline shingles. I'm wondering what to do for the ...
  A: Since the Timberline shingles are laminated you won't be able to cut them into ridge caps then bend ...
Ventialtion with No Soffits12/2/2011
  Q: Ventilation with No Soffits This question is about ventilation solutions. First, I’ll try to ...
  A: Brian, Your house is perfect for a product I've been using for years with houses like yours that ...
roof wet10/27/2011
  Q: what does it mean if my roof has wet areas in the morning and no one else has a wet roof
  A: Tom, Most likely the wet areas are condensation. It's the same thing as an ice cold drink on a hot ...
Wet roof question10/20/2011
  Q: We are having our roof done. The contractor peeled the old shingles off, and started installing ice ...
  A: The roof deck and framing that got wet will certainly dry and probably won't be a problem. You would ...
Roofing Nails & Issues10/12/2011
  Q: Portions of our 6-year old roof blew off during a recent storm. During repairs, we discovered that ...
  A: Pat, Non corrosive and electro-galvanized nails are very different, there may be some interchange ...
reroof10/5/2011
  Q: How would you go about putting asphalt shingles over a metal panel roof. I was told to either nail ...
  A: Bill, Shingle manufacturers only allow for their material to be installed over a nailable wood ...
HELP DECIDING REPAIR OPTION10/4/2011
  Q: I have an east facing 2/12 roof with a run of about 30 feet which transitions to a 5/12 roof for 10 ...
  A: I have zero opinion on the plywood tape- what's the point? If the roof is installed properly there ...
Repairing roof leak caused by pitch ledge: re-pitch or add drainage?10/2/2011
  Q: We live in a 5-unit brownstone. The fifth (top unit) was added back in the 1970's. The old roof's ...
  A: Dan, Adding slope is almost always a better option. Roof drains can clog and cause damage when they ...
HELP DECIDING REPAIR OPTION10/1/2011
  Q: I have an east facing 2/12 roof with a run of about 30 feet which transitions to a 5/12 roof for 10 ...
  A: Mark, You need to confirm the pitch of the roof. Shingles may not be installed on a pitch below ...
roof without soffit/ventilation9/27/2011
  Q: Our house has a slate roof (about 60 years old) that was recently inspected by a roofer. He advised ...
  A: Lesley, Without inspecting your house I can't say for sure why you are prone to these damaging ice ...
bituthene roofing problem9/10/2011
  Q: My mom had our roof done about 8-10 years ago. The roofer used some sort of Bituthene.Since then,we ...
  A: Sally, I wouldn't be happy with that answer. Why should you be stuck with problems you trusted ...
Painting drip edge.8/31/2011
  Q: We are having our shingles replaced. The old shingles and drip edge were black. We want to change ...
  A: Drip edge is available in white, black and brown; I wouldn't bother painting it. Drip edge ...
gutter and drip edge question8/23/2011
  Q: It appears the spikes attaching my gutters to the fascia weren't keeping the back of the gutters ...
  A: Ben, Missing Drip Edge: Drip edge is always a good idea- you can put it in now if you are careful. ...
Roof repair8/9/2011
  Q: A couple of months ago I had a contractor fix a major hole in my roof over the front bedroom, which ...
  A: Emma, My answer below makes the assumption that you have a written contract with your roofer. ...
roof contractor8/4/2011
  Q: I just got a contractor to replace my roof. I did not pay him yet. But I am just wondering if I ...
  A: If you have reason to believe that the work was done poorly or that the men installing it weren't ...
nails/broken plywood7/22/2011
  Q: We're having a garage built & very long nails were used on the shingles. They come through several ...
  A: Shelley, Without a picture I couldn't really say if the long nails and broken plywood is a problem. ...
Roof replacement7/18/2011
  Q: Tom, I have woodshake shingles about 16 year old and looking for a replacement with Certrainteed ...
  A: Your questions are a bit too general for me to answer, you need to do a little more re search. What ...
cutting sections of metal roof sheets out6/20/2011
  Q: I have small roofing business in South Africa, We have a project coming up where 2m sections of ...
  A: Ann, I would use an electric shear like this one: ...
Attic Fan for Large Townhouse5/22/2011
  Q: We experience extreme heat on the upper level of our townhouse which was not solved with the ...
  A: Jean, I've had many clients with the same problem; none were solved with the addition of an attic ...
METAL REPLACEMENT ROOF4/29/2011
  Q: I live in snow country and my present asphalt roof is 21 years old. When I speak with roofing ...
  A: Pete, The easiest solution for the flat roof is to add slope with tapered insulation; tapered ...
reroofing4/22/2011
  Q: Is it possible to heat the single ply or multi ply rolls with a torch over the existing flat asphalt ...
  A: Chris, If the existing roof is compatible you may be able to apply your new material directly over ...
asphalt shingle roof4/21/2011
  Q: We live in Raleigh and had a new roof installed about 5.5 years ago, the same time we had an ...
  A: A simple utility knife will work; but the right type of blade is key. Use a hook blade, you can buy ...
asphalt shingle roof4/18/2011
  Q: We live in Raleigh and had a new roof installed about 5.5 years ago, the same time we had an ...
  A: Richard, Sorry it took me so long to get back with you. #1 The shingles should overhang the edge ...
shingleing an add on room to trailer4/12/2011
  Q: i am building a 12 ft by 12 ft room onto a metal roof trailer, i build the roof about a 1 inch from ...
  A: Jesse, You will still want to use a piece of metal flashing to bridge between the metal and shingle ...
Attic ventillation4/12/2011
  Q: I live in southern Manitoba,where we get brutal winters.I have a 60 year old story and a half,and a ...
  A: Michael, Stay away from the turbines, they are prone to leaking, squeaking and letting wind driven ...
roofing job4/8/2011
  Q: I just had a Presidential roof installed and something doesn't seem right. The shingles appear to ...
  A: Mary, I only see one picture, it happens to be of the left side; but without anything to compare to ...
Ridg Vent4/5/2011
  Q: I had a new roof installed last August. Since that time, the ridge vent has blown off twice. The ...
  A: Jay, If properly secured the ridge vent should stay right where it is; most are designed to ...
Flashing issue4/4/2011
  Q: I just had my 20 year old roof replaced. There were several places where the decking had to be ...
  A: Fred, There are many ways to hold the flashing without penetrating it; your roofer just doesn't know ...
roof4/4/2011
  Q: My home is 15 years old and shingles are starting to come off occasionally after storms. I'm not ...
  A: Scott, In fifteen years in business I've only done one layover. 99% of the roofs I replace have at ...
Rain noise4/2/2011
  Q: Tom, In November of 2009 you responded to a question regarding rain noise. The question is copied ...
  A: Doug, Drywall won't deaden any sound transmission; its also not suitable for roof underlayment. My ...
Flashing issue4/1/2011
  Q: I just had my 20 year old roof replaced. There were several places where the decking had to be ...
  A: Fred, Look here for proper apron flashing details: https://www.nrca.net/consumer/types/asphalt.aspx ...
proper roof install3/29/2011
  Q: I recently had a roofer install architectural shingles. Upon checking the installation the roofer ...
  A: Steve, Sorry for your trouble. I'll assume you have called the roofer and told him of the problems ...
asphalt dimensional shingles2/27/2011
  Q: is it necessary to buy hip and ridge shingles or can you use 3 tab and cut them to save money? when ...
  A: Ed, You can use 3 tab shingles for hip and ridge caps- however you wind up with a ridge that wont ...
Archtectural Shingle Installation2/26/2011
  Q: I am install architectural shingles on a roof and the instructions on the shingles are not very ...
  A: Robert, Everything you want to know is here in far greater detail than I can describe: ...
starter shinge or ice guard2/13/2011
  Q: I WOULD LIKE TO KNOW IF SOMEONE USED ICEGUARD FOR A STARTER SINGLE IF IT WILL CAUSE PROBLEMS....I ...
  A: Yes using ice and water shield for a starter will cause problems. Iceguard or whatever its called ...
cedar shingle reroof2/12/2011
  Q: Our kitchen is a small converted barn attached to the (200 year old) farmhous in New England. ...
  A: Steve, This would be my choice, its a roof deck and insulation all in one. This would be your best ...
Bad Roofing Job?2/3/2011
  Q: Ever since I got my shingles replaced; if we have a lot of rain, I end up with black/brown streaks ...
  A: A picture would really help here. It sounds like you have a gutter full of leaves, that can make ...
Rolled roofing installation1/25/2011
  Q: My question pertains to rolled roofing being installed on a flat roof. We recently visited ...
  A: The real problem would be moisture under the roof bursting out; not so much soaking through. ...
Rolled roofing installation1/24/2011
  Q: My question pertains to rolled roofing being installed on a flat roof. We recently visited ...
  A: Mark, Flat roofs can sometimes hold a little bit of water, most low slope roofs have little bumps or ...
selecting a roof1/7/2011
  Q: i have a rental house, i need to replace the roof on. i am going with a 25 yr tamko shingle. is this ...
  A: Tamko makes good shingles; but the shingles are only a small part of what makes a good roof. ...
Roof leak question...1/1/2011
  Q: Mr. Petrilli, My sister has a couple of leaks in her roof, and I can't...for the life of me...find ...
  A: David, Roofing and siding contractors sometimes use scaffold planks, the attachments for the ...
Weird Vibrating Noise11/22/2010
  Q: Beginning yesterday, we started hearing a weird noise from our roof. After inspecting, it appears ...
  A: Carolyn, Shingles won't make a vibrating noise; if they move in the wind they typically snap off and ...
Terracotta Roofing Repair11/20/2010
  Q: I had my terracotta roof repaired, replacing 9 tiles. After the roofers left, there are some sort ...
  A: Chris, This question is best directed at the contractor that did the work; but I'll tell you what it ...
Copper roof and sheathing11/20/2010
  Q: can OSB be used with overlying copper roof vs plywood and if not why
  A: OSB and plywood are both suitable roof decks for standing seam copper roofs. There are some ...
roofing11/16/2010
  Q: Have recently installed 30 yr. arch. owens corning shingle on resd. home. Also replaced ridge vent ...
  A: Matt, Although I have never seen this in person it makes total sense to me. The ridge vent is hard ...
GAF-ELK Lifetime11/10/2010
  Q: What are the physical differences between the GAF-ELK Timberline Prestique High Def 40 and the ...
  A: Jim, This question is best directed at the manufacturer. To hold each shingle in your hand you ...
Gutter & cosmetic problem with steel roof11/10/2010
  Q: My new steel roof is great but I can see the asphalt shingles underneath it from my birds eye view ...
  A: Mary, This is a problem that should be taken up with the installer; he can fabricate a drip edge ...
Expert disputes in hail damage11/5/2010
  Q: I ran into an apartment building which has a one-story 3-tab ashphalt shingle with heavy hail ...
  A: The condo board needs to call its legal council. More interaction with the insurance company by ...
Torched down roof11/4/2010
  Q: Old roof stripped down to the joists and turned over to contractor. Obviously they failed to strike ...
  A: Uh Oh... This looks like the roof is 1.5" underwater; this will be a problem. The only way to fix ...
Slate Roof -- Repair or Replace10/19/2010
  Q: Tom, We recently had a hail storm and suffered some damage on our 80 year old slate roof. Two ...
  A: Steve, From the single picture I see I would go ahead with the repair. The slates I see look to be ...
flat roof - roll roofing10/13/2010
  Q: Have had to tear up a 25x25 ft flat roof over a garage and undo the 2 previous contractors errors ...
  A: Rip it up and start over. The existing conditions will result in failure no matter which direction ...
flat roof - roll roofing10/12/2010
  Q: Have had to tear up a 25x25 ft flat roof over a garage and undo the 2 previous contractors errors ...
  A: Paul, Moisture causes felt paper to wrinkle, it doesn't wrinkle or get bumpy for any other reason. ...
Felt paper10/5/2010
  Q: I put down 30# felt paper about 3 weeks ago. Normally I would shingle it right away, but because of ...
  A: Carl, You might want to start over again with new felt; 30# felt is pretty strong stuff, the bumps ...
Standing Seam10/1/2010
  Q: I was hoping you could assist me with a few questions. I am trying to save energy anyway I can. We ...
  A: Duane, I have removed countless 90 year old metal roofs that were installed over 4-6" spaced ...
eave next to chimney9/28/2010
  Q: Our cultured stone chimney extends past the upper roof edge about 8 inches. We need to install an ...
  A: Mary, You need what we sometimes refer to as a kicker. The very last piece of step flashing is ...
difference in shingles9/28/2010
  Q: We've been looking at different shingles in Lowes & Home depot.(Owens corning vs. GAF) I want a ...
  A: Metal roofing requires more skill and precision than shingles. Depending on how complicated your ...
difference in shingles9/28/2010
  Q: We've been looking at different shingles in Lowes & Home depot.(Owens corning vs. GAF) I want a ...
  A: Elizabeth, I have been installing GAF shingles almost exclusively for nearly 18 years; in those 18 ...
Residential felt paper under asphalt shingle9/28/2010
  Q: i have changed my asphalt shingle roof two days ago and the contractor has used some kind of sticky ...
  A: Some materials do have an asphalt odor when their packages are opened, but I have never had a ...
eave next to chimney9/27/2010
  Q: Our cultured stone chimney extends past the upper roof edge about 8 inches. We need to install an ...
  A: Mary, You need what we sometimes refer to as a kicker. The very last piece of step flashing is ...
Architectual shingle installation measurements9/23/2010
  Q: I know I need to pop an 11 inch line for my starter shingles. I can't figure out the other ...
  A: I don't know exactly what shingle you are working with, so I can't say what your line measurements ...
metal porch covering9/19/2010
  Q: I would like to put a covered deck on my house,but my house has shingle roofing and i would like tin ...
  A: Bill, After building the structure for the porch you will need to remove at least four courses of ...
Roofing(ashphalt shingles)9/14/2010
  Q: Proper way to shingle a roof
  A: Jack, Too general a question for me to answer here. Here are a few places to start: 1) Choose a ...
temporary roof coating before slating?9/12/2010
  Q: I have a roof that I'm planning to slate eventually. It was framed and decked with 1" rough sawn ...
  A: Covering old felt with tar seems like more trouble and mess than its worth. You have already had ...
rain9/10/2010
  Q: I am looking to put up q piece of.flashing on my roof to stop rain from pouring straight down. I ...
  A: James, You can lift your shingles; you'll need a flat bar, ask at home depot, they'll get you one. ...
Proper Venting of Mansard Rood9/2/2010
  Q: My house has a mansard roof in the front and standard with soffit vents in the rear. The existing ...
  A: Ed, Ridge vents and soffit vents are almost always the best solution. A balanced ventilation system ...
new rubber roof8/30/2010
  Q: I am on the building committee of a small rural church. We are replacing a flat roof over our ...
  A: Ken, I've never been a fan of recovers; it seems backward to me to cover over a roof deck that ...
metal shed rusty roof replacement8/28/2010
  Q: Hey I have a cheap big box hardware store metal shed with a rusty roof. Its made of very thin metal ...
  A: Chuck, Finding just the roofing panels from your old shed kit is probably a lost cause. There are ...
a branching8/23/2010
  Q: Building a new log home from one of the big log home companies, using their professional plans. Have ...
  A: You will probably want to do a closed cut valley; the weave style tends to cause problems. The ...
a branching "Y" valley8/19/2010
  Q: Building a new log home from one of the big log home companies, using their professional plans. Have ...
  A: That's a tough spot. I would make a copper flashing device that would cover each direction by 12" ...
Rubber roof into gutter8/16/2010
  Q: An answer to yourI am installing epdm 60 mil rubber on a roof with around 1/12 or 2/12 pitch, and i ...
  A: Fasten the drip edge over the membrane at the edge of the roof. Use epoxy coated deck screws every ...
roof vents8/8/2010
  Q: when ventalating a gable roof with drywall underneath -I understand need for ridge vent %26 soffit ...
  A: Kim, Usually you do the best you can on the main roof and it will normally suffice. Typically ...
roofer took vents off my building8/5/2010
  Q: I had a new tpo roof put on over an asphalt type flat roof a little over a year ago. The roofer ...
  A: Usually your insurance company will pay for the effect but not the cause; meaning that they will pay ...
roofer took vents off my building8/4/2010
  Q: I had a new tpo roof put on over an asphalt type flat roof a little over a year ago. The roofer ...
  A: Paulette, I've never been a fan of recovers; it seems backward to me to cover over a roof deck that ...
ridge vents vrs. vent fans7/10/2010
  Q: I live in Georgia and it is very hot at present. I am go to have a new roof put on in the next week ...
  A: Ridge vents are usually the best option. The electric fans only kick on when the thermostat switch ...
Roof Advice7/6/2010
  Q: I have a 1600 sq ft home in south florida. It has partial flat roof with asphalt material and mild ...
  A: Wayne, Any competent roofing contractor can install tapered insulation to your roof deck, it will ...
Painting Asphalt Shingles7/6/2010
  Q: Tom, I'm writing to ask your opinion about the effectiveness of repairing the ridge caps and ...
  A: John, I've never coated a shingle roof; but I have seen it done on many houses. Coating over ...
Re: Issues with pooling on a new tapered system flat roof.6/24/2010
  Q: Tom, I'm stuck and am having a hard time finding the right answer. My crew just installed a ...
  A: Greg, Flat roofs don't drain like car windshields; most flat roofs have a little residual water left ...
Wind damage to Shingles6/22/2010
  Q: I live in San Antonio, TX. We had a server storm a few weeks ago and I had shingles blown off the ...
  A: My best suggestion is to have the entire roof gone over by your roofer. He should go up and check ...
Flat/Low Slope6/20/2010
  Q: I purchased my 1915 Baltimore row house in 2004, so I don't know the history of its roof ...
  A: Deborah, Flat roofs in in really broad terms can last between 5 and 30 years; it really depends on ...
Reroofing only one slope6/19/2010
  Q: I have a two layer roof on my house in New Mexico that just took hail damage. The insurance claims ...
  A: David, In my experience; the insurance company will only pay to replace non damaged roof planes if ...
"New" metal roof leaking,6/17/2010
  Q: Two years ago I paid for a 'lifetime" roof..custom crimped at 3 times the price of standard ...
  A: Kristi, From here I can't really tell what is wrong or what you can specifically do to stop the ...
Cool Roof6/7/2010
  Q: I have a large room (20x40) in my house that is not insulated (to preserve aesthetics). As the sun ...
  A: Eve, Keep it as clean and bright as possible; I can't say for sure if it will work, the thermal gain ...
ridge vents6/5/2010
  Q: Tom, I had my roof replaced two years ago that included replacement of the decking. I requested that ...
  A: "If you see the opening at the peak and a dark black strip about 1.75"- 3" wide running along the ...
ridge vents6/5/2010
  Q: Tom, I had my roof replaced two years ago that included replacement of the decking. I requested that ...
  A: Karen, If you could see daylight you would also see rain coming in. Depending on the type of ridge ...
Roofing Shingle6/1/2010
  Q: Installation question regarding asphalt shingle; do today's shingles require the removal of the ...
  A: Frank, The shingle package does not say to remove the cellophane. The cellophane keeps the shingles ...
re-flashing and osb v. plywood5/30/2010
  Q: We're at a point where we need to replace our existing roof. The house was built in 1974 and was ...
  A: Emma, Re-flashing is important; any step, apron, counter and pan flashings should always be ...
price of roofing material5/29/2010
  Q: I had a new roof put in and had some shingles left at my house that I would like to sell but don't ...
  A: Save them if you have room, they need to be stored flat. Lay three bundles down in one direction, ...
Brie roof5/27/2010
  Q: We are moving to Hawaii, to the rainy side of one of the islands. On the house we are preparing to ...
  A: Maria, I only see one photo; this site only allows one picture to be posted. I'm as far away from ...
Ridge Vents5/27/2010
  Q: We are having a new roof installed on our 2-story colonial home in Chicago. It was suggested that we ...
  A: David, Ridge vents are usually the best option. The electric fans only kick on when the thermostat ...
wordage with shingles5/25/2010
  Q: We replaced the asphalt shingles on our American Legion. We put a double layer of shingles down in ...
  A: Mark, I've only done this once, but here is how I did it. As the shingles were being installed I ...
Composite Shakes5/23/2010
  Q: We are looking at replacing our wood shake roof with a composite. The products we are looking at ...
  A: I've never installed either product, so I can't say which is better. There are other experts with ...
reroofing mobile home5/16/2010
  Q: i just had my mobile home roofed the roofer did not put black felt over the plywood.He just nailed ...
  A: Elizabeth, My answer is yes, and no. The felt provides temporary waterproofing before the shingles ...
TPO roof mechanical fastners5/5/2010
  Q: I have a JM TPO roof that is raising off with wind. I am trying to determine the standard that ...
  A: Scott, Those aren't recommendations, those are pretty much law. The specification and installation ...
FLAT ROOF5/1/2010
  Q: Had roof over porch replaced using GAF ELK LIBERTY 2 PLY SYSTEM, LIBERTY BASE, LIBERTY CAP. The row ...
  A: Without being on the job I cant say why this is happening; so I'll just focus on how to fix it. ...
Water on facia4/27/2010
  Q: We have a new (3yr old) Decra metal roof with a drip edge. The drip edge overlaps the inside back ...
  A: That sounds like a leak in the field (higher up) of the roof, not so much a problem at the drip ...
Water on facia4/27/2010
  Q: We have a new (3yr old) Decra metal roof with a drip edge. The drip edge overlaps the inside back ...
  A: Juli, I can't tell you exactly what to do from here; but this is what I would do. Get a ladder and ...
Dripping from Ceiling Vent4/22/2010
  Q: I own a top floor condo in Boulder, Colorado. On and off the ceiling vent in my kitchen (right by my ...
  A: Ross, Multi unit dwellings typically have a multitude of systems in the top floor ceilings. ...
roofing4/10/2010
  Q: my roof is leaking. the roof is a one pitch roof and it has a rubber roof on it. i don't want to put ...
  A: Never read answer
paint a tin roof with some rust4/10/2010
  Q: I have a sloped tin roof, ab;out 40 years old on my house in southeastern Vermont. It is fine except ...
  A: Buzz, Easy question for a Saturday, Scrape off the loose paint, lightly sand off the rust and apply ...
Roof and Ventillation4/8/2010
  Q: I am replacing my asphalt roof. Currently I have gable vents and attic fan. Should I consider ridge ...
  A: The ideal roof would have even continuous soffit venting at the eaves and a continuous vent at the ...
roof4/7/2010
  Q: i need to shingle my roof and im able to do it myself i have only one set of shingles on there now ...
  A: Jason, I've never been a fan of layovers; in 14 years in business I've only done one. When you ...
metal roof4/6/2010
  Q: We are building a new house and have used a metal roof. It has a vent cap on top. There are a number ...
  A: Shirley, There are a number of ways to go about this, I'll start with cheap and easy: Cheap and ...
Partial roof replacement/ mixing materials3/29/2010
  Q: We have a south facing house and the front of the house roof has soft spots, waves and has lost as ...
  A: It will be a little extra work but yes you can have two different types of material on the same ...
Felt - is it needed?3/29/2010
  Q: I recently hired a roofing contractor to remove existing shingles and install new roofing. I assumed ...
  A: My answer is yes, and no. The felt provides temporary waterproofing before the shingles are ...
Roofing3/24/2010
  Q: I noticed a response you had to a question regarding nails backing out of shingle causing leaks. I ...
  A: Robert, I have had a few projects with very small planks for roof decking, 1x2, 1x3 and 1x4. ...
Roof under warranty, roofer won't return calls for repairs, now major damage exists3/18/2010
  Q: Please assist me with an ongoing problem with a roofing contractor, if possible. My aunt had a roof ...
  A: I can answer most questions about roofing techniques and proper installation details. You are ...
New Asphalt Shingle Roof Wind Damange3/16/2010
  Q: I have a new Shingle Roof in August 2009. This weekend we had a windstorm in New York City. About 15 ...
  A: The cellophane keeps the shingles from sticking to each other when they are stacked together in a ...
Drip edge with 1" hat/extension3/16/2010
  Q: I have a single wide mobile home that was built in 1991 with a 3-tab shingle roof and wood siding. ...
  A: Jeff, Shingle need to overhang drip edges, especially on low slopes. When the shingle doesn't ...
New Asphalt Shingle Roof Wind Damange3/14/2010
  Q: I have a new Shingle Roof in August 2009. This weekend we had a windstorm in New York City. About 15 ...
  A: Eric, Your roofing shingles have a wind rating from the manufacturer. 1) Find the brand and style ...
leaking old roof - repair or replace3/13/2010
  Q: My son and i own a house which is rented out. We are in the UK. It is a 1920s house with slates ...
  A: Sue, It seems as if all signs are pointing to complete replacement. If the roof has been leaking ...
starter strips3/11/2010
  Q: Is a starter strip necessary when using ice and water shield with architectural shingles?
  A: Yes you need a starter. The starter does the job at the edge of the roof that the underlying shingle ...
kneewall in attic3/7/2010
  Q: On one side of my 2 story house (circa 1840)the roof sags in places over a length about 40 feet .A ...
  A: Bill, I'm not an engineer, and neither is the roofer you are talking to. Spend the money and get a ...
sliding shingles3/7/2010
  Q: 2 years ago, I paid my neighbor to reshingle my garage. He replaced everything including the ...
  A: Theresa, The shingles are supposed to overhang the roof on all edges; is that what you are ...
Sag in roof3/5/2010
  Q: Our house is approximately 45 years old. The roof sags between the peak and the eaves, it is ...
  A: Matt, That I'm aware of the only way to level the roof deck is to remove the shingles and the ...
condition of roof3/5/2010
  Q: We had GAF Timberline Ultra 40 roofing installed in 1994. The product is already cracking and the ...
  A: Yes, call the contractor that installed the roof. He will evaluate the roof and will then probably ...
Gluing Old Shingles2/17/2010
  Q: What is your opinion of the effectiveness of gluing old shingles down that were lifted by wind ...
  A: Robert, If its just a few shingles that need some adhesive there should be no problem. You will find ...
Reroofing - how many times?2/17/2010
  Q: How many times can you put asphalt shingles over the underlying plywood before you have to worry ...
  A: Ralph, When the roof comes off it will be plain to see if the roof deck is shot. Weak plywood will ...
insulating asphalt shingles?2/17/2010
  Q: Last year we replaced out roof and now doing our income taxes we note that there is a tax credit for ...
  A: Barbara, There are only a two 25 year shingles with Energy Star ratings; Certainteed Star White and ...
???2/16/2010
  Q: Let me give you some history first. I live in Rock Hill SC. A suburb of Charlotte NC. My home ...
  A: Dave, In order: 1) Metal roofing itself has no r-value; but a reflective surface will cut down on ...
Shingle Roof Color Change2/16/2010
  Q: We have a black shingle roof that is only 4 years old. We would like to change it to white, a ...
  A: Abigail, I've never done this, but I have seen it on some commercial buildings. It looks OK; you ...
metric vs standard shingles2/15/2010
  Q: We recently had standard size GAF Timberline shingles installed on our roof. Since then, we have ...
  A: Ralph, Call your contractor, he would have the easiest time finding you a few bundles of matching ...
Reroofing - how many times?2/15/2010
  Q: How many times can you put asphalt shingles over the underlying plywood before you have to worry ...
  A: Ralph, The holding power of the roofing nails is completely dependent on the soundness of the ...
water stain on vaulted ceiling2/14/2010
  Q: In January, 2007 we had a professional company install a new roof with standard 30 year shingles. A ...
  A: Bob, Without putting my eyes on it I can't give you a definitive answer. Eight feet below a ridge is ...
Polaralum2/13/2010
  Q: My roofing contractor just recommended installing polaralum under my shinges instead of felt. They ...
  A: Danny, I have no idea if this works; I have never used it. I'm also not sure if that is a fair price ...
metal roof and shingles2/9/2010
  Q: we have a lovely home with a shingled roof. We plan to build a roof over our patio. Is it possible ...
  A: Sunni, Yes you can very easily tie a metal roof into a shingle roof. When the roof is being ...
ridge vent vs power vents2/3/2010
  Q: I have to replace my fifteen year old shingle roof. The house is L shaped with a 2:1 pitch. ...
  A: Paul, The gable vents might be hurting more than helping; go up in the attic with an incense stick. ...
Frost in attic1/31/2010
  Q: Last summer I had new siding and a metal roof installed and this winter i notice a lot of frost in ...
  A: Brian, I dont see a question here; but I'll guess that you want to know how to stop the frost on the ...
intake vents1/30/2010
  Q: We installed a ridge vent on our 90 year old home. We are now trying to figure out the intake vents ...
  A: Nuria, Sorry but your only option at this point is to tear into the existing roof; there are a ...
Recourse for shoddy roof installation?1/25/2010
  Q: Had a new roof installed in July 2009 by a company rate "A-" by the BBB. Well-known company from ...
  A: Jade, I don't know the laws in your state so you might want to consult a lawyer, but three attempts ...
Copper Roof Colorization1/23/2010
  Q: We would like to treat a new copper roof, in northeast Ohio near Lake Erie, with the appropriate ...
  A: Marc, I have used products from this company before with good results: ...
Need help diagnosing cause of a leak1/21/2010
  Q: First, some background: 1928 house, owned since 2000. Roof deck is 1x solid wood of varying widths, ...
  A: Joe, I wouldn't do the hose test just yet. The only way I can see this being settled is for you to ...
Replacing felt paper when replacing shingles1/19/2010
  Q: Is it necessary to replace 11 year old 30 lb felt paper when replacing hail damaged shingles on ...
  A: Paul, We always remove the existing underlayment (felt), if it is left in place the installer can ...
Need help diagnosing cause of a leak1/19/2010
  Q: First, some background: 1928 house, owned since 2000. Roof deck is 1x solid wood of varying widths, ...
  A: Joe, Even though the temps haven't been above 40 the underlayment will still perform, I'm thinking ...
Repair Vent Pipe Boot Flashing1/16/2010
  Q: I'm looking to repair a cracked Boot on my roof. What I'd like to do is just replace the boot part ...
  A: Eileen, I think this should fit the bill: ...
temperature1/11/2010
  Q: I live in Roanoke, Va (southwestern part of the state) what should be the temperature this time of ...
  A: Cecil, 35-45 degrees is warm enough to install your shingles. The only drawback to installing ...
Shingle Installation1/9/2010
  Q: Tom - Does the cellophane stripping on back of the shingle need to be removed prior to installing ...
  A: Russ, The cellophane keeps the shingles from sticking to each other when they are stacked together ...
asphalt shingles installation1/8/2010
  Q: I put on a new roof 12 years ago using OC Architectural Shingles with 40 yr. warranty. This fall ...
  A: Meredith, 35-45 degrees is warm enough to install your shingles. The only drawback to installing ...
EPDM and TPO install temp1/7/2010
  Q: Our addition requires a EPDM flat roof, but the temp outside is 30 degrees. A roofer suggested ...
  A: Carol, I'm sorry but no; there are no other single ply black roofs that can be installed below 30. ...
asphalt shingles installation1/7/2010
  Q: I put on a new roof 12 years ago using OC Architectural Shingles with 40 yr. warranty. This fall ...
  A: Meredith, From your description I'm imagining a house that looks like Hearst Castle. The best ...
overlaying roof decking1/5/2010
  Q: Our house was built in 1972 and now has to have a third roof laid. Due to poor workmanship and ...
  A: Marcy, The holding power of the roofing nails is completely dependent on the soundness of the ...
dust1/4/2010
  Q: I had my house reroofed two years ago. Since the we have a black dust that seems to be seeping in ...
  A: Bruce, You say its dust, so I'm not thinking about mold or some type of spore. Could it be a puff ...
New Roof Installed in the Winter1/1/2010
  Q: Tom, First of all thank you first you assistance. I live in Cincinnati Ohio and recently received ...
  A: Richard, The shingles will lay down; I promise. You wont have to wait months either; 50 degrees and ...
bad roofing job12/31/2009
  Q: My roof looks worse than it did before it was replaced. The gutters are crooked and hung bad. They ...
  A: Laura, I cant really see much from the picture. There are a few things that you can do; first ...
Downspout clogging12/27/2009
  Q: I have a home surrounded by mature elms which drop seeds that clog my gutters.I was wondering if ...
  A: Michael, Sorry its taken me so long to get back with you; the holidays have me running all over the ...
comparing roofing materials12/22/2009
  Q: Two reputable and recommended roofing contractors, at nearly the same price (less than 10% ...
  A: Brian, EasyTImberline 30 with 30# felt. Ask for six nails per shingle; you will have better ...
RIDGE VENTS & TURTLE VENTS - SHOULD THEY BE INSTALLED TOGETHER?12/18/2009
  Q: I am the vice-president of our condo association for a 2 bldg, 32 unit complex in Harrison Twp, MI ...
  A: Melinda, Usually ridge vents (coupled with vents at the eaves) should be the only vents on the roof. ...
Tar & Gravel roof to Asphalt Shingle12/15/2009
  Q: We had a bad storm come through that did an extreme amount of damage to our home including the roof. ...
  A: Jim, You didn't say why the plywood needed to be replaced or the reason your contractor gave you for ...
Replacing T-lock Shingles12/12/2009
  Q: I live in a small apartment complex and we have a leak in one apartment. Assuming we locate the leak ...
  A: Depending on where the leak is the shingles might not have to be removed. T locks are no longer in ...
Roof Vent12/10/2009
  Q: I have a walk-in attic, unfinished. I have a roof vent on the peak of the roof, that runs almost ...
  A: Sheila, I have never seen this before; but I have heard about it. When its really cold and windy, ...
ridge vent12/8/2009
  Q: I recently had a metal building constructed of which I am making into a cabin. They used U panel on ...
  A: I should have explained this better, sorry. With the insulation close to the roof deck; the "attic" ...
attic roof nails sweating12/8/2009
  Q: i have a small area of attic which was convertd into a small office space and notice during the cold ...
  A: Tim, I don't have a clear picture of this converted space in my head; but it sounds like there is a ...
Roof getting wet before completion12/5/2009
  Q: I am getting my roof replaced and they ran out of shingles late in the day. It snowed (Birmingham, ...
  A: Ebb, Everything should be fine; you might want to ask that if the exposed paper/felt is wrinkled ...
3/12 roof -- Ridge vent or other solution?12/5/2009
  Q: VENTING - WHAT TO DO?? I've included some info about our house below, for reference. Here's our ...
  A: Meredith, I have installed miles of ridge vent on 3/12 and I have never ever had a problem. Block ...
Perforated soffit - how to calculate net free area12/5/2009
  Q: I do not know the manufacturer of our perforated soffit material, so I cannot look up the stats on ...
  A: Meredith, I've been thinking of a way for you to calculate this. You could block off a 1 sq" area, ...
new roof12/3/2009
  Q: Tom, Thank you for your quick response. I realize I did not actually ask a question. The following ...
  A: Dedra, Yes and no; if the shingles are a heavy architectural grade then yes; they could still be a ...
New roof12/3/2009
  Q: I had a new roof installed on Nov. 13th. I live near Atlanta, Ga. The day they put the roof on, it ...
  A: Dedra, I don't really see a question here: It sounds like a lot of the people involved think the ...
Earthtone Cedar shingles12/2/2009
  Q: Can you tell me who is the manufacturer of the Earthtone Cedar shingle? The only other info I have ...
  A: Gloria, Shingle manufacturers will give different names to the same colors of shingle depending on ...
New roof12/1/2009
  Q: Just had a new roof installed along with a ridge vent. The temperature was around 60 F when they ...
  A: Gary, The heavier architectural shingles will take some time to lay down; usually full sun and 60 ...
Plumbing vent in flat roof11/30/2009
  Q: Part of my house has a flat roof with a plumbing vent. My father, an expert roofer recently past ...
  A: Shelby, Sorry to hear about your father. I'll try my best to talk you through this. Rubber roofs ...
Water on fascia (with gutter) during rain11/28/2009
  Q: If the water drips on some areas of the fascia (with 6-in. width gutter) when it rains, where is the ...
  A: Ann, This can have two causes; both of them are roof related. 1) The roof might not have adequate ...
starter strip11/24/2009
  Q: I am currently having my roof replaced by a local contractor. It was brought to my attention by my ...
  A: Eileen, The starter shingle is installed to cover the joints where two shingles come together. On ...
Ceiling leak11/23/2009
  Q: For the fourth year in a row, in the exact same spot, a wet area is forming on my first floor ...
  A: Cut out the ceiling and leave it out, that way you might get a better sense of the type of leak you ...
Ceiling leak11/23/2009
  Q: For the fourth year in a row, in the exact same spot, a wet area is forming on my first floor ...
  A: Dee, I have had a few of these over the years. Its almost impossible for me to figure it out without ...
roofing, ondura11/19/2009
  Q: Is ondura (or fiber/asphalt)a good idea for a roof over. My roof is over 15 years old and I want to ...
  A: I've never installed Ondura; but I've torn it off before. It seems to be a heavy asphalt impregnated ...
Installation of pipe flashings for shingle roof11/13/2009
  Q: How is the metal flange on a pipe flashing that is exposed over the top of the shingle on the down ...
  A: Jack, Most of the time you don't need any exposed fasteners, any nails through the collar should be ...
Venting through ridge vent11/12/2009
  Q: I would like to vent the bathroom fan and dryer out through the ridge vent in our roof. It will be a ...
  A: Ian, Each bath/dryer fan should have a separate sealed port to the outside. Just aiming the hose ...
Roofing11/11/2009
  Q: I have two estimates for two flat roofs. one on extension to garage and one over car port. one ...
  A: Joseph, Each material is meant for different situations, so Im a little confused. Liberty is ...
roof11/10/2009
  Q: the house is a shaley style . the roof is framed with 3x6 every two feet with 2x6 tung and grove ...
  A: Richard, Ive only done one project like this. This was the material we used, it has plywood bonded ...
Rain Noise on EPDM roofing11/9/2009
  Q: I have a rubber roof which produces too much noise inside the house when it rains. The roof was ...
  A: Lincoln, You didn't mention what type of roof you had before so I'll assume it was a similar ...
tar paper11/8/2009
  Q: What are the lines on tar paper to be used for? I have helped on a few roofs for friends and no one ...
  A: Andrew, The lines aren't really used by steep slope (shingle) roofers. When drying in the roof the ...
Importance of complying w/ASTM 3462 standards?11/3/2009
  Q: Please, my homework for this roofing job causes me to request compliance w/ the ASTM 3462 standards ...
  A: Martha, 1) I would be surprised if you found a shingle that didn't comply with ASTM d3462. Secondly ...
Roof Shingle step flashing11/3/2009
  Q: I have inspected a three tab shingle roof installed on my in-laws new Northwest Wisconsin home. ...
  A: Fred, Where a shingle roof meets a wall or other vertical area there should be step flashing ...
Timberline High Def Prestique 3011/2/2009
  Q: My roof was just done (complete tear-off) with Timberline hd 30 charcoal shingles. I noticed after ...
  A: Mike, Charging for things that are not installed or provided is not a common industry practice. ...
Slate Roof Repair10/28/2009
  Q: I’d like to get your opinion on a roof repair of my residential home. I recently hired a licensed ...
  A: Sam, Glad some of the repairs were fixed. In order: 1) Slate hooks; lots of people will continue to ...
Roof-Shingles, venting, flat roof, contactor10/26/2009
  Q: 1. I live in Toronto in a small brick Post-WWII style bungalow that faces south, 20X40' in size with ...
  A: Chris, Flat Roof: I have never had one of my roofs (TPO or EPDM) eaten by an animal. TPO and EPDM ...
Tar Paper10/26/2009
  Q: We are building a new home and my contractor put tar paper on our roof and the day after it started ...
  A: Christina, Not too much to worry about; they should stop the water from coming though. OSB can ...
Roof-Shingles, venting, flat roof, contactor10/25/2009
  Q: 1. I live in Toronto in a small brick Post-WWII style bungalow that faces south, 20X40' in size with ...
  A: Chris, It seems the more estimates a person gets the more convoluted the whole thing becomes. I will ...
Installing a drip edge10/23/2009
  Q: I just had my roofing contractor walk off my roofing job after it failed the inspection for lacking ...
  A: Bill, Fasten the drip edge on the roof side only; not on the face. One nail or screw per 10 to 12" ...
ridge vent installation10/23/2009
  Q: 2 months ago I had a new shingle roof installed. Previously we had electric turbines yet this ...
  A: Betsy, There could be many reasons why the decking is cut back only on one side. Judging solely on ...
roofing contract10/23/2009
  Q: I signed a roofing contract to tear off my roof and replace with new Owens Corning shingles. My ...
  A: Ned, In order: Tear Off Charges: Unless your contract has a contingency fee written into it ...
roofing options10/23/2009
  Q: I have a tar and gravel roof. It is 17 years old and leaks here and there every year. I decided to ...
  A: Jaff, I would install the TPO. Modified Bitumen: Sometime referred to as "Torch Down" this ...
types of shingles10/22/2009
  Q: I understand that there are 3 kinds of shingles...basic, architectural and hi-end architectural. ...
  A: Better shingles last longer, sometimes look better and are usually better for the environment. Read ...
Roofing material for flat roof deck over heated space10/21/2009
  Q: I have a small roof deck (18x7.5) over heated living space. Unfortunately the deck has no slope and ...
  A: Thomas, I don't know if carpet is the best way to go. Here is what I would do: 1) You can add ...
manufactured home roof10/21/2009
  Q: We have a 1999 double wide home, can we install a ridge line vent,The other vents[factory] are ...
  A: William, I'm not really familiar with this type of construction. But a ridge vent should be ...
ridge vents and power attic vents10/17/2009
  Q: We added ridge vents with the new roof shingles and left the mounted power attic vents in place and ...
  A: Lynn, In most cases ridge vent and attic fans shouldn't be used together. This may shed some light ...
flashing10/15/2009
  Q: When an handyman checked out my roof to see where a squirrel may have entered, he found that the ...
  A: Again; any qualified roofer can fabricate metal to close the opening in your facia/soffit assembly. ...
gutter drainage10/15/2009
  Q: We live in Southern Ontario in a bungalow about 20yrs. old. The roof has asphalt shingles and ...
  A: Penny, For the most part you have answered your own questions. You can check a few things first ...
flashing10/14/2009
  Q: When an handyman checked out my roof to see where a squirrel may have entered, he found that the ...
  A: Amanda, I'm sorry but I have never heard of these terms the handymen have given you. Any qualified ...
peeling galvanized roof10/13/2009
  Q: Tom, I have asked several experts about this problem, my metal roof was painted with latex paint on ...
  A: It sounds like you are using the wrong kind of paint. If the roof is from 1939 its probably Terne. ...
Gable Vent10/13/2009
  Q: I am adding an addition too an existing structure. It will have a new ridge line 3 feet below the ...
  A: Kevin, Where I live we must keep wall penetrations at least 12" off of the roof deck. I have no ...
Help10/12/2009
  Q: please tell me how to get black tar of my sheet rock wall. Someone put it on to hold the mirror up
  A: Gail, This really isn't a roofing problem but I'll try to answer this for you. I have had spills and ...
Metal roofing ridge vent10/11/2009
  Q: We've put up a standing seam metal roof on our new garage, and now we're ready to put the ridge vent ...
  A: Mary, In order: 1) Ridge metal overlap: you should lap your pieces by two to three inches; it's not ...
water and ice10/10/2009
  Q: We have recently obtained estimates for a roof replacement, and I am confused that the estimates ...
  A: Janise, Ice and water shield should be installed to reach a minimum of 24" inside the warm wall of ...
Cracked Shingles10/9/2009
  Q: Hey Tom, I'm a realtor in Mpls, MN and had an inspection yesterday on a 30 year warranted ...
  A: Shingles crack for lots of reasons; age, structural movement, assembly defects, roof deck insulation ...
Cracked Shingles10/8/2009
  Q: Hey Tom, I'm a realtor in Mpls, MN and had an inspection yesterday on a 30 year warranted ...
  A: Kim, I have seen these types of cracks before. This is what should happen; 1) The current Owner ...
Black Streaks on Roof10/7/2009
  Q: My house is about 8 years old, I have noticed my roof has like black (dark) streaks running down the ...
  A: Cecilia, What you have is algae; there are a few ways to deal with it. The reason your house has ...
drip edge & working on high slopes10/6/2009
  Q: I have two questions: 1) I installed a new roof on my house and the aluminum drip edge is buckling. ...
  A: Thomas, In order: 1) drip edge should be nailed on the roof side only, every 8"-10" with roofing ...
asphalt roofing10/4/2009
  Q: Tom I have a gable roof with 43 squares. The pitch is 5/12 except for a flatter 7 square portion ...
  A: Low slope roof gets installed first, the self adhered membrane should extend up steep slope 18" or ...
diamond-shaped shingles?10/4/2009
  Q: We have a '26 bungalow that needs a new roof, and I would love to get diamond-shaped shingles ...
  A: Janine, From what I have learned about the shingles you are looking for is that they are made only ...
weight bearing10/4/2009
  Q: My customer wants to upgrade to a Lifetime shingle from a 30 yr Arch. I need to know if he will need ...
  A: Marty, If you follow local building codes for normal loads you probably won't have to compensate for ...
asphalt roofing10/4/2009
  Q: Tom I have a gable roof with 43 squares. The pitch is 5/12 except for a flatter 7 square portion ...
  A: Peter, Certainteed has a great low slope alternative ...
Roofing10/2/2009
  Q: My roofing contractor did not remove the old nails from tearing off the two old shingle layers ...
  A: Yes and no; if the old nails were driven down flat with the roof deck everything should be ok. When ...
Leaking cape-cod roof10/1/2009
  Q: I keep getting water in the attic below the window. It seemed to come from the roof at the bottom ...
  A: Yes; any re-roofing project should entail replacing and correcting any condition that would allow ...
leak by vent10/1/2009
  Q: We have a typical ranch home regular roof nothing fancy. We have a leak by the vent when we had new ...
  A: If you are comfortable with a hammer, flat bar and a utility knife you can probably do this on your ...
Leaking cape-cod roof9/30/2009
  Q: I keep getting water in the attic below the window. It seemed to come from the roof at the bottom ...
  A: I can't see from the picture but you should check something. Pull back the J-channel (the vinyl ...
Slate Roof Repair9/30/2009
  Q: I’d like to get your opinion on a roof repair of my residential home. I recently hired a licensed ...
  A: Sam, I cant see much from the picture you attached. I'll address these in order: Large holes packed ...
hidden gutter9/29/2009
  Q: my cedar shake roof has been removed and resheeted with 1/2" sheathing,over strapping and bottom 3' ...
  A: Harry, Most EPDM and single ply membrane manuals state that the roof must be substantially dry ...
standing seam metal roofing around skylights9/28/2009
  Q: I have a small new construction bathroom that I am applying standing seam roofing on and it has six ...
  A: Clay, Hopefully you haven't ordered the skylights yet because this is your chance to make this a ...

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Tom Petrilli

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Expertise

I can answer questions about residential and light commercial roofing. I really enjoy solving complicated problems. My expertise is in shingle, slate and traditional metals (copper, lead, terne, stainless) as well as single ply low slope roofing. I have also installed a considerable amount of synthetic slate.

Experience

I have been a roofer for 21 years, I've owned my own company for the past 13.

Organizations
The National Roofing Contractors Assoc and Virginia Association of Roofing Contractors

Education/Credentials
I have attended numerous manufacturer training programs as well as sought out experts in specialized work for instruction.

Awards and Honors
A+ rating from the Better Business Bureau, A rating from Angies List, highest mark for quality and value from the Washington Consumer Checkbook

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