02:16PM | 03/03/03
Member Since: 03/02/03
1 lifetime posts
HELP! We had a porch abutted up to our home. We had a tin roof on. It leaked at the junction of the house and the porch. We are closing in the porch, ripped off the tin roof and put a plywood roof up, and covered it with tar paper. We were going to shingle the roof but it started raining. Now the entire roof is leaking, especially at the junction of the house and the porch. The porch roof is about 6 inches lower than the
house roof, with very little overhang from the house to the roof (less than 3-4 inches).
Why is the roof leaking all over with the tar paper nailed on? I thought this was supposed to stop the rain! How can we join the house and the porch roof so it won't leak. All our panelling and insulation is getting wet. I am very upset over this whole project. HELP!


05:41PM | 03/03/03
Member Since: 11/06/02
1280 lifetime posts
There is no reason that I know of why a porch roof should cause your entire roof to leak. How old is your roof? The standard is fifteen to twenty years.

My theory is that the existing house roof has expired, being already beyond it's prime. The foot raffic of having folks walk around up there took an already aged and brittle roof over the edge.

The tarpaper won't do much to stop roof leaks in a nearly flat roof such as you describe but I would caution you to make sure that it does pitch away from the house at 1/4" in every foot at the least.

For the junction between roofs, and probably for the whole situation, you need an experienced roofer to build the flashing for you.

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