My husband and I have received two estimates to replace our flat roofs(lower roof 14’x17 1/2’ upper roof 34 1/2 x 17’). We are now trying to decide which roofing co. we should hire to replace our two flat roofs on our 1890 brownstone.
The first estimate proposes to install the following for $11,960.00 (Firestone 60 mil EPDM membrane):
-Install 1/4" Dens deck Prime roof insulation mechanically fastened to the roof deck.
-Install Firestone 60 mil EPDM membrane, fully adhered to insulation in accordance with the manufacturers 20 year specifications.
-Install new flashing at all perimeters, curbs, and all roof penetrations.
-Install shop fabricated .032 brown aluminum coping, drip edge, and counter flashings and terminations.
-Install 6" ogee brown aluminum gutter and 4" aluminum downspout to replace existing at rear.
0Workmanship guranteed against leakage for two years.
The second estimate proposes the following for $16,491.00 (3 ply modified
bitumen roof system):
-Provide and install new perimeter edge metal.
-Provide and install 3 squares of fiberglass base sheet.
-Provide and install 3 squares of SBS modified bitumen smooth surface modified bitumen roofing installed in a cold applied fashion.
-provide and install 3 squares of SBS granular surface modified bitumen roofing installed in a cold applied fashion.
-Provide and install 14 feet new SBS modified bitumen granular sufaced wall flashing.
-Provide and install all new base flashings to the roof curbs and chimneys.
-Provide and install .032 aluminum counter flashing where needed.
-Provide and install new pitch pocket flashing to the conduit lines.
-Provide and install loose granules to the bleed out of all seams.
-Provide an exclusive lifetime guarantee/warranty for manufacturing defects and misapplication.
I’m not sure if one product is superior to the other (3 ply modified bitumen vs/ 60 mil EPDM membrane) to justify the difference in price or if one company’s proposal is superior to the other? We live in D.C. so the weather is not too extreme. We do have a large tree in the rear of our yard but it doesn’t hang directly over the roof so it really shouldn’t be a problem (unless lightening strikes it or some other act of nature). -Are there any other questions I might want to ask either company when comparing their bids? Each company has a very good reputation and have both been around for a long time. -Any advice or insight is greatly appreciated since I’ve never owned a house with a flat roof before.