Framing A New Roof Over An Old Roof

If your existing roof is fairly old there s a good chance the shingles are damaged.

Framing a new roof over an old roof.

While it might look possible to use the old ceiling joists they would need to be grade checked to make sure they meet the present code. You re better off removing the old roof. This new roof with a higher pitch can be accomplished with premade roof trusses and typical asphalt shingles. However building the roof will be easier if there are two people working on the roof together.

Installing a new roof over an existing one also called a layover or nailover is often possible although not always the best option a properly installed layover roof can look and function as well. Shingles that are raised or misshapen make it hard to lay a smooth flat layer of new shingles on top. A roof over a mobile home can also help prevent damage from falling tree limbs as well as cut down on the annoying noise of hearing heavy raindrops falling on the roof. When necessary to tie the new rafters into the house framing the workers cut into the old roof to make the secure connections.

A layer of old deteriorating shingles can make your new roof look bad. The exposed edges of the 3 layers of rigid insulation are no longer exposed. Replacing a roof can be expensive but if a roof contains only a small slope it s possible to raise the roof pitch of a house by building a roof over the old one. Putting a new roof over a leaking roof won t remove the leaks.

You can frame a new roof over the old but it will need to be designed for the span and pitch. Box beam gable framing new gable overhang is framed in the form of a box beam hanging off of a new layer of roof plywood roof sheathing cantilevered over the top of the 3 layers of rigid insulation. That s also why building codes commonly limit re roofing to no more than two layers. But if the current roof is curling this isn t possible.

Anyone with basic carpentry skills can build a roof over a mobile home. The sheathing must be stripped from the old roof for a couple feet along the bottom to get the new ceiling joists in.