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About Shawn Watson
(Top Expert on this page)

Expertise
I own a company in the Washington, DC area that specializes in slate, copper and tin roofing. I can answer questions about historic roof installation and sheet metal fabrication.

Experience
I have 25 years of experience in slate roofing and sheet metal. I am a member of The National Slate Association, National Trust for Historic Preservation and Historic Society of Washington, DC.

Organizations
The National Slate Association, National Trust for Historic Preservation and Historic Society of Washington, DC.

Education/Credentials
25 years of experience on projects like The White House, Department of Treasury, and projects built circa 1671 - current. I have also consulted in our area.

   

You are here:  Experts > Home/Garden > Home Improvement/Repair > Roofing

Questions Answered By Expert  Shawn Watson 
In Category  Roofing

SubjectDate Asked

biobased roof coatings10/8/2008
  Q: I am interested in learning more about the soybean based liquid roof coating that is applied over an ...
  A: I am not familiar with this product. We use a water based acrylic coating. It is an elastomeric ...
Caulking used to seal flashing around shingles9/28/2008
  Q: We have a 30-year roof shingle. It appears that water is getting behind some flashing around our ...
  A: Sorry for the delay but I am in Texas at my son's graduation. There is NO caulking that cost $30 ...
5-V ridge cap closure strips for ventilation + tolerances9/27/2008
  Q: will be installing wider (9in fr ctr) ridge cap on 3-1/2 in 12 as extra rain-blow guard on this ...
  A: Sorry I am in Texas for my son's graduation from Air Force basic training. I know of no ...
fireplace wall leak9/22/2008
  Q: We own a tudor home with a slate roof. We have plaster walls and about a year and a half ago, ...
  A: It is possible for the leak to appear just as it is. The water can enter and bypass the second floor ...
ice and water shield9/17/2008
  Q: I'm having my new roof torn off and replaced after a one week period because the sub-contractor ...
  A: Yes because during the removal process their tools will damage the membrane. You should make sure ...
Sealing valleys on barrel tile roof9/15/2008
  Q: I have a 2 year old barrel tile roof that meets Florida hurricane standards. Due to some recent ...
  A: In my opinion, no don't seal them. My reasoning is that when it is done after the roof is in place ...
Ice dams9/12/2008
  Q: I have a family room adition off my house. It has cathedral ceilings. I get ice buildup ever ...
  A: I believe that you are talking about an ice slide. It is a sheet metal perimeter that does not allow ...
proper ventilation9/9/2008
  Q: Shawn, I am the chair of the Buildings and Ground Committee for the First United Presbyterian ...
  A: First, I am sorry that you are replacing slate with shingles... I was on the road and was unabile ...
slate or asbestos tile roofing9/8/2008
  Q: I have had two insurance adjusters from the same company tell me two different things about my roof. ...
  A: Sorry somehow the system messed up. I am not sure if you received an answer or when you sent this. ...
Roof replaced/repaired9/5/2008
  Q: I have a flat patio roof that I've been told needs to be replaced. I have 2 leaks & got 3 bids from ...
  A: Yes. This is the right material and he is correct that you have to heat the flashing. The standard ...
Roof replaced/repaired9/4/2008
  Q: I have a flat patio roof that I've been told needs to be replaced. I have 2 leaks & got 3 bids from ...
  A: Torch down is a modified bitumen sheet (plasticized asphalt) that is fully adhered using a propane ...
Asbestos cement roof capping9/3/2008
  Q: I lost 5 or 6 caps from my roof in hurrican Gustaff. I have replacement caps, but do not know what ...
  A: You need a hook ladder or chicken ladder (same thing) so that you don't damage shingles. Holes ...
Solution for Restoring 2000m2 Copper Doom Roof9/2/2008
  Q: Sir, we would like to seek for your advise on how to restore the 70% black stained copper roof (over ...
  A: Your best choice would be Follansbee Rapidri with their primer first or Calbar water based paint. ...
Ridge Vent vs Whirly Bird vent8/25/2008
  Q: I'm having my roof redone and the contractor is wanting to use ridge venting.A friend of mine says ...
  A: Personally I like the ridgevent. Fewer working parts and requires no maintenance. The birds after a ...
Asbestos tile roofing8/21/2008
  Q: I work for a General contractor in Kansas City. I am a former adjuster and handle insurance claims ...
  A: I would agree that no synthetic materials are equivalent to slate. Since asbestos has been banned it ...
Cathedral church roof - reshingle8/14/2008
  Q: Church has cathedral arches; built 1970. Roof deck is 3.5 " thick toung and grooved lumber on top of ...
  A: I have never seen shingles nailed directly over insulation. We have fastened the insulation to the ...
Hip Roof, no overhang8/12/2008
  Q: Watson, I'm in central Mississippi. My house has a hip roof but no overhang. We are needing to ...
  A: I think your best option is to install a vent along the eave and low profile vents at the ridge or ...
log home roof8/11/2008
  Q: I need to change the roof of my 19 year old log home. There are many trees around and it always ...
  A: Yes the darker shingles will draw more heat and should dry quicker. I would suggest that you install ...
low pitched asphalt roof attatched to Cedar8/3/2008
  Q: I have a cedar siding home and I may have leaks where the previous owner connected a sunroom to the ...
  A: I would suggest that you get an elastomeric coating to seal the roof. You can get it at Home Depot. ...
Certainteed Shingles Scarce7/25/2008
  Q: We are replacing our 19 year-old cedar shake roof which is prematurely deteriorated and failing. We ...
  A: I try to stay away from asphalt products but I do know that there is a shortage of asphalt right ...
GAF Slateline shingle7/20/2008
  Q: Last year I spent $14,000 to replace my old tile-roof with 50 years warranty GAF Slateline shingle. ...
  A: I am sorry but they are a shadow line shingle with keyways that taper to form illusion of dimension. ...
insulating outside of the rafters7/15/2008
  Q: I'm adding a second floor to my house, which means an all-new roof. The attic will be used for ...
  A: Sorry for the delayed answer. On a slate project across the state. Venting all roofing is best in ...
Roofing7/15/2008
  Q: How much should a 30year shingle to remove old and to put new, on cost? 32 squares and ridge cap ...
  A: Sorry for the delay but I was on a slate project across the state. It will vary greatly from state ...
Corrugated Panels7/12/2008
  Q: Can any one out there can tell me or Digrams showing how to install corrugated Panels for the inside ...
  A: I am very sorry for the delayed response. I have been out of town on a project. This type of ...
Roofing/Framing6/15/2008
  Q: I just had my second roof put on my new house! The question is about leaking around the porches and ...
  A: Sorry for the delay but I was out for Father's Day with my family. Sounds like you need a cricket ...
Roofing/Framing6/15/2008
  Q: I just had my second roof put on my new house! The question is about leaking around the porches and ...
  A: 2 1/2" on both sides would be 5" total which is too great. As a rule it should be 1 1/2" for a ...
Cutting 'M' type truss5/16/2008
  Q: I have a 1 storey house , its about 2 yr old they used 'M' type struss , i was wondering if the 45 ...
  A: I have seen this done. It doesn't mean that it meets code, but the "M" portion is removed and as ...
Replacing a low pitch tiled roof on a 3 bed bungalow5/15/2008
  Q: Could u give me a ball park figure for replacing a tiled roof on a medium size bungalow with slates ...
  A: I am in the Washington, DC area and our cost would be approximately $1,600 a square (10'x10') to ...
drip edge over ice dam5/10/2008
  Q: I had a new roof installed 3 years ago and for the past 2 years have experienced water damage on all ...
  A: yes. Please send me pictures. I am sorry for the delay but it was my Sabbath. I can tell you ...
New Flat Roof4/29/2008
  Q: I have received 3 proposals for a new flat roof with a slate turret for a rowhouse in Washington, ...
  A: The slate turret prices seem high. We are replacing a turret with real slate on Kenyon St NW and the ...

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