Three Layers Of Shingles On Roof

Unless the roof caves in.

Three layers of shingles on roof.

Layers of shingles on top of each other shorten the life of the roof due to the newest layer sitting on an uneven lower surfaces. You can either use special shingles called ridge shingles or cut a number of regular shingles into 3 tabbed equal pieces and bend each so they fit snugly on the roof peak and nail them into place. But contractors who spoke with angie s list say best practices call for stripping the roof down to the wood deck to inspect it before installing a new roof. According to the international existing building code homes can be re roofed one time by applying a second layer of roof shingles over the existing one but after that application begins to wear.

I haven t read a disclosure in a long time but if the previous owner had concealed anything it seems the new owner wouldn t yet know about the layers of roofing. Bring the ridge edges together with a ridge capping layer. Having multiple layers of shingles is going to make your roof hotter because the heat gets trapped between the layers which could mean premature aging of the shingles. If there are really three layers of shingles it probably is far from a hidden issue.

The best life will come from removing all the old layers down to roof boards or sheathing and then laying down the new roof on a well repaired flat surface. You ll need longer nails for this part as you re driving through more layers of shingles. Now you just have to decide whether to remove the existing roof shingles or recover the roof. Your three layer roof is definitely a potential structural concern and homeowners insurance companies might consider three layers of roof shingles.