Framing New Roof Over Existing Roof

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.

Framing new roof over existing roof.

Sounds simple enough right. Fold new shingles over the new valley onto the old roof overlapping by at least a foot. The old shingles are visible inside the framing of the new roof. The roof is erected over a deck that will be screened as an outdoor living area.

Then nail shingles on the new roof and exposed areas of the old roof. There are a few situations where roofing over an existing roof just isn t possible. This new roof with a higher pitch can be accomplished with premade roof trusses and typical asphalt shingles. Unfortunately it s not an option for everyone.

How to tie a additions roof to existing roof roof additions to existing roofs how to construct a roof from an exsisting shead how to change a roof line how to attach a deck roof to existing roof how to add a roof over porch attache porch roof on house attach shed roof to house adding a roof to screened in porch adding a roof to existing. The roof sheathing on the old roof is not rotten just not up to the standards my dh thinks it should be. Finish the new roof by nailing on osb sheathing covering it with roofing paper and nailing in metal flashing along the valleys and metal drip edge at the eaves. Roofs are framed out of lumber and pieced together in a series of triangles designed to bear the load.

We aren t planning on going up a floor so the roof would only be marginally higher than it is now. 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. Shown is the new rafter system of the porch. When you recover your old roof stays and the new roof gets installed on top.

Dh is a very skilled carpenter and is confident that he can do this work. The new ridge will tie into the existing roof as a hip and valley offshoot. Metal roofing materials are available in several styles that require different fastening applications but are most commonly screwed to the roof framing or sheathing material. The exposed edges of the 3 layers of rigid insulation are no longer exposed.

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. We are planning to frame the new roof over the existing roof.