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About Tom Petrilli
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

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

Roofing - Roofing

Expert: Tom Petrilli - 11/11/2009

Question
I have two estimates for two flat roofs. one on extension to garage and one over car port. one said installing a GAF Timerline 30 roof with felt tar paper. the other says installing a GAF Liberty flat roof. what is the difference or are they both the same? Wood is rotten so both are putting 3/4" CDX exterior grade plywood. do not know which one to go with. can you help me??

Answer
Joseph,
Each material is meant for different situations, so Im a little confused.

Liberty is designed to be used in low slope applications or roofs that appear almost flat.
http://www.gaf.com/Content/GAF/RES1/ROOF/liberty.asp?viewer=1140&module=

Timberline shingles are for steeper slopes.
http://www.gaf.com/General/GAFmain.asp?silo=RES1&ws=GAF&APP=ROOF&Force=shingle-l...

As far as choosing a material or contractor; I think you should get another in-person opinion. These materials are for completely different uses; it would be like comparing a cars tires to its radio; they each belong on a car but they have completely different jobs and really aren't comparable.

Learn about flat roofs here: http://www.lyonscontracting.com/new-flat-roof.html

Learn about shingle roofs here: http://www.lyonscontracting.com/shingle-start-finish.html

Good luck,
Tom

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