First time here I am a refugee from Knots Forum with a roof question. Some of those guys over there holler at you if you ask a construction question. I am building an utility building on the back of my garage and not having built a building in some time I have forgotten the least pitch drop on a roof. I think it is 1/2 inch per foot. Am I right?
Thanks
les
Replies
Depends totally on what your roofing material is going to be.
Four pitch and under I recommend EPDM, although I believe some shingle manufacturers will let you do a 4 pitch as long as you've got ice and water shield under the whole roof.
If you can squeeze a five pitch or higher in, you can use good ole' three tabs.
You did say it's a utility building, right? So we're looking for low cost solutions, right?
Half-inch per foot isn't much. Do you get much rain in your part of Texas? EDPM might work well, but it's not cheap and is not the easiest to install for a DIYer. There are newer self-stick materials that may do a good job and may cost less. Polyglass is one brand name. Old double-coverage rolled asphalt roofing is probably cheaper still.
Al Mollitor, Sharon MA
if you go with metal you can go around 2 1/2 pitch
Minimum piotch for most "Flat Roof" materials is a quarter inch per foot. If you are thinking of doing it yourself with double coverage selvedge, you better go to 1/2" or more. For metal, you can do it with 2/12 if you use bituthene under it. sphalt shingles can go to 3/12 pitch in the south. Cedar shingles - no less than 4/12
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Thanks for the fast response, I should have given you more details. The roof will be metal, the size 7' X 11'. The reason it is that size, my nephew gave me enough bricks for the floor to make it that size, I had one brick left over. I have a 6' cedar fence around my backyard and I have to keep the height of my "shed" below that because of deed restrictions.
I boxed in the area with 4" X 4"s, drilled 2 holes in each and drove 1/2" rebar to keep it from moving and leveled it with sand before laying my brick down. It turned out quite nice.
Someone ask if it rains much here, o yeah, we are on the gulf coast we get more than our share sometimes, however today it was a nice balmy 96 degrees with 79 percent humidity. I would welcome a little rain.
Gods Peace
les
Joe Fusco has a really good article on roof framing at his website http://www.josephfusco.org check it out he has charts instructions and everything you'll need at his site.
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