Over Framing An Existing Roof

Installing a new roof over an existing one also called a layover or nailover is often possible although not always the best option.

Over framing an existing roof.

The rise or height of the roof at its peak is the altitude of the triangle. Premade roofing trusses will be easier and take less time than installing a stick built roof. When you are building a patio cover off of an existing roof or wall you must take all of your measurements from the point at which the patio roof will attach to the existing structure not the outside of the slab. Remove the top several levels to.

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. Then mount new trusses on the new addition walls. The roof sheathing on the old roof is not rotten just not up to the standards my dh thinks it should be. Below is a link to a roof plan with a section that is over framed see note 3.

Also a link to elevations of house. On the gable ends this was pretty easy. And the line length measurement from the roof peak to the building wall is the hypotenuse. You ll need to remove the siding where it meets the roof.

We are planning to frame the new roof over the existing roof. Over framing is when you frame a roof section on top of another roof section such as when joining a l shaped roof with each section at right angles to each other etc. 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. 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.

Butt the first new truss against the old one. We aren t planning on going up a floor so the roof would only be marginally higher than it is now. A properly installed layover roof can look and function as well. 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.

The existing slab can vary considerably throwing off crucial measurements. The run or half the building span is the base of the triangle. How to increase the pitch by building a roof over an existing roof use premade roof trusses. Patio cover plans building.

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. Tying in to an existing gable roof.