I am re-roofing my porch. 1.5mtr x 1.5mtr with a felted flat roof.
The original builder (rot him) put a 30cm parapit around it with one brick removed to allow the water to escape.
So I have 4 inturnal corners and a chute to felt. How do you make a corner without cutting the felt and weakening the proofing or folding it and making a total bodge.
all help welcome