Roofing Installation Articles

Plywood Beneath Metal Roofing?

September 4, 2009

Q: We are getting estimates on replacing the tin roof on our house. One contractor has given us an estimate with a plywood sheathing base under the metal and another without. He said that adding the sheathing would enhance the wind resistance and leak resistance of the roof. (We live in southeast Louisiana.)Another contractor has… ( read more )

Install Over Old Shingles

September 1, 2009

Q: We’re looking to replace our asphalt shingle roof with a 26 gauge galvalume metal roof. In your opinion should we have the old shingles removed or just have the metal place over the shingles? Also, if leaving the shingles should we have anything between the shingles and the wood? We live in central Texas… ( read more )

Structural Insulated Panels

August 31, 2009

Q: We are building a home with 8″ structural insulated panels (SIPS) for the roof decking (9/12) and want to use a Fabral SSR roof on top. As an engineer, I know the value of ventilation, but when asked, the roof & SIP manufacturers point at each other and say, ‘whatever he says’. Do I… ( read more )

Hip Caps and Closure on a Metal Roof

August 14, 2009

Q: I am installing a metal hip roof and am concerned about the possibility of leakage around the hip caps seams. The ridge cap covers the seams but leaves gaps underneath due to the ridged profile of the roofing. What can I do to seal these gaps? A: The good thing about hips, in contrast… ( read more )

New Metal Roof

August 13, 2009

Q: I’ve got a few questions for you regarding metal roof installs. We’ve currently got a composition shingle roof that is 8 years old. I has some hail damage, but no leak problem at all. There is a local job we looked at that uses U panel on a new construction, and are giving some… ( read more )

Does Metal Roofing Require A Roof Deck?

Q. We just built a 16’x16′ shed, that will be converted into a guest house in a year or two. Our contractor installed a metal roof, but he put it directly on 2×4’s attached to the rafters, as opposed to installing on a roof deck. The 2×4’s are 3 1/2 feet apart in some places…. ( read more )