Looking at adding a simple porch roof to an existing home. Two story brick (mostly), some lap siding on the back of the second floor. The area in question already has a concrete slab, and is enclosed on two sides by the house. The ridge would be attached to the house, no problems there. The question concerns the sidewall flashing to the brick, where the new roof slopes downward. The brick wall is solid…no windows, protrusions, etc. Would it work to saw cut a slot in the brick and silicone in a length of flashing? Length will be about 18 ft, slope about 3:12, three tab shingles.
Do it right, or do it twice.