This kind of depends what kind of roofing you are planning to use. The
cheapest way is with tin but that tends to leak over time. The next
cheapest is roll roofing where you need to torch down the seams. Then you
can use comp shingles.

As far as the slope goes, the tin you can get by with a 1:12 pitch The roll
roofing with a torch don edge you can go 2:12 or 3:12 for comp shingles give
yourself at least a 4:12.

I think I would go with the comp and a 4:12 pitch. Be sure to consider wind
load as you have a big sail catching the wind. bolt the sucker down.

--

Roger Shoaf

About the time I had mastered getting the toothpaste back in the tube, then
they come up with this striped stuff.
"Gunner" wrote in message
news
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