The roof should be in sound.
Roof framing over existing roof.
How to increase the pitch by building a roof over an existing roof use premade roof trusses.
Position the square at the end of the rafter board with the tongue on your left and facing away from you.
How to install a roof over an existing roof determine the feasibility.
You ll need to remove the siding where it meets the roof.
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On the gable ends this was pretty easy.
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.
Multiple layers of shingles can make it difficult or impossible for the nails to penetrate.
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.
Inspect the condition of your current roof.
Add the length of the overhang beyond this mark and.
The condition of the existing roof is critical.
Remove the top several levels to.