How To Install Tin Roofing Over Shingles. By removing the old roof before the new roof’s installation, you are able to give the underlayment a thorough inspection to ensure there are no damages that could cause leaks or other issues with your new roof. Would it make sense to add foam insulation between old roof and new metal shingles to keep house cooler in a summer.
I have a roofing problem similar to one described by jim (message from 04/09). The metal roofing is then secured to these slats of wood on the roof. For ideal results you should ensure that the boards are 24″ apart.
Asphalt roofs typically last 20 to 30 years, depending on the installation and shingle quality.
Venting—the eaves to vent the roof, holes are cut in the old roof above the soffit, which pulls air through the soffit vents underneath. How much does a metal roof cost? These slats of wood run perpendicular to the metal roofing itself. Can you install metal roof over shingles?