re-roofing Articles

Can Metal Be Installed Over Two Layers?

June 9, 2009

Dean wrote and asked me: Q: My cottage has one layer of shingles. But my detached garage has two layers. They are getting very old with mold growing on them and are curling in spots. Is it advisable to install metal shingles over the existing layers of asphalt singles? I responded: A: The low weight… ( read more )