Over Framing An Existing Roof

The run or half the building span is the base of the triangle.

Over framing an existing roof.

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. One of the keys to over roofing is to tie the air control layer of the roof assembly to the air control layer of the wall assembly. And the line length measurement from the roof peak to the building wall is the hypotenuse. On the front of the roof edges the original roof deck sheathing was cut back flush with the wall and the fully adhered membrane folded down around the rafter tails to catch the.

On the gable ends this was pretty easy. The roof sheathing on the old roof is not rotten just not up to the standards my dh thinks it should be. Remove the top several levels to. Framing a roof is the last step in framing new construction.

The fully adhered membrane wrapped down over the cut back roof deck to tie into the wall water control layer and air control layer photograph 11. You ll need to remove the siding where it meets the roof. Dh is a very skilled carpenter and is confident that he can do this work. We are planning to frame the new roof over the existing roof.

The rise or height of the roof at its peak is the altitude of the triangle. Patio cover plans building. Premade roofing trusses will be easier and take less time than installing a stick built roof. A properly installed layover roof can look and function as well.

Butt the first new truss against the old one. Installing a new roof over an existing one also called a layover or nailover is often possible although not always the best option. While most home builders will outsource the construction of roofing trusses the rafter supports of the roof itself learning to frame a roof yourself is one of the true arts of carpentry and a basic primer is covered below. Below is a link to a roof plan with a section that is over framed see note 3.

Tie into the end of an existing gable roof by removing existing facing boards wall siding and any other obstructions back to the first truss of the old roof. Then mount new trusses on the new addition walls. Also a link to elevations of house. We aren t planning on going up a floor so the roof would only be marginally higher than it is now.

Tying in to an existing gable roof. The existing slab can vary considerably throwing off crucial measurements.