I’m building a woodshed that has a 8x12 ft single slope roof. I put on felt paper with 16" overlaps (snows and ice here) and flashing. so good so far.
Then i put on a few courses of 3 tab shingles but dark was closing in. Since there was rain and wind in the forecast for that nite I put 2x4’s over the felt paper edges and weights on the 2x4’s. idea was to prevent wind from grabbing the felt paper and shredding it. Next morning went out for a look see and found the felt paper bubbled up from the rain. I sure didn’t expect that because I believed that the felt paper was water proof.
So now what? do i lay the remaining courses over the wrinkled/bubbled up felt paper? or, do i rip it all off and start over?
Have mercy on me, I’m a software engineer and have never done a roof before.