Depending on your roofing material, minimum slope should be 3 in 12.
This is for shingles and a lot of metal profiles. If you go to a 1 1/2"
tall rib on a metal profile with sealant tape on top of the lapping
ribs, I think you can go down to a 1 1 /2" in 12", but that makes me
nervous. Of course, I've always lived in rainier climates.


--
Gary Brady
Austin, TX
www.powdercoatoven.4t.com

Gunner wrote:
Im at the point where Im getting ready to put a roof on my "awning" in
the back yard. Its a 16' x 16' freestandinging gizmo that will cover
my welding Stuff, a place to work on vehicles, and so forth. Lots of
similar units around here are flat roofed, but as it appears that we
may be getting some rain for the next couple years, Id like to put a
small slope on it. How much slope should I put in a 8' span, just to
get rid of rain water? 4" 3"?

Gunner

"At the core of liberalism is the spoiled child -
miserable, as all spoiled children are, unsatisfied,
demanding, ill-disciplined, despotic and useless.
Liberalism is a philosphy of sniveling brats." -- P.J. O'Rourke