I’m looking to add a patio roof and would like to get some thoughts on how to tie it into the existing roof. The problem is that it needs to fit within an “inside L”. To make matters more difficult, the existing roof is only 3/12 on the two sides where it will meet the cover. Below is my attempt at a drawing (new roof in blue). I’m open to virtually any design–shed, gable, etc. However, I want to tie the eaves and cornices of the new structure into the existing ones, so I can’t just continue the 3/12 slope further down.
There is only about 7’ of run on the side with the upper wall (light gray roof behind the new cover). By the way, neighborhood covenants limit us to using architectural asphalt shingles.
The longest side (width) of the cover will be approx 31’. Short side (depth) is approx. 13’.
By the way, during heavy rains, a LOT of water runs into the existing valley where the two 3/12 roofs meet–one-fourth of the upper roof and the area to the left. (The upper roof is actually hipped, not gabled as drawn).
This has me stumped, so I’d be really grateful for any suggestions.