Framing New Roof Over Existing Roof

When you recover your old roof stays and the new roof gets installed on top.

Framing new roof over existing roof.

Lay a metal roofing panel over the existing roof material in the bottom corner of the roof surface and fasten to the roof according to the metal panel instructions. The new ridge will tie into the existing roof as a hip and valley offshoot. The roof is erected over a deck that will be screened as an outdoor living area. 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. Dh is a very skilled carpenter and is confident that he can do this work. 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. 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.

There are a few situations where roofing over an existing roof just isn t possible. Roofing over your existing roof is not always possible. Roofs are framed out of lumber and pieced together in a series of triangles designed to bear the load. 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.

We aren t planning on going up a floor so the roof would only be marginally higher than it is now. We are planning to frame the new roof over the existing roof. If you are building a new home putting an addition on an existing home or replacing your roof down to the rafters you will need a new roof frame. The exposed edges of the 3 layers of rigid insulation are no longer exposed.

Then nail shingles on the new roof and exposed areas of the old roof. Sounds simple enough right. 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. 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.

Unfortunately it s not an option for everyone. Shown is the new rafter system of the porch.