Old shingle roof with low slope roof leaking Table of contents Leaking low slope roof addition Shingles are not acceptable On low slope Show Table of ContentsHide121Leaking low slope roof additionThis photo shows attempted repairs in problem areas like the porch roof tying into the main roof. Go To Pin2Shingles are not acceptable On low slopeHere, you can see that one course of shingles has been lifted and damaged during the back porch installation. Under shingle, the membrane should have been applied underneath 2 to 3 courses minimum, even when the proper membrane roof is applied. Go To Pin