We installed a large retractable awning over the patio a few years
ago. It works well except for one problem. If the awning is extended
when it rains, the canvas gets wet, sags, and a lot of rain
accumulates in the depression. So far, I have caught it before any
damage, but a couple of times a fairly large amount of water had
I am wondering if I should see about installing some kind of drain in
the canvas and, if so, what?
The awning is 20' wide and about 12' deep when fully extended. This is
the company that makes them and ours looks a lot like the ones on the
main page: time it rained pretty hard. I didn't notice that it was extendedfor awhile. When I did, the puddle was a long oval. The length wasabout 80% of the width of awning (so about 16'). The width was about2' at the widest. It was maybe 6-10" deep at the deepest point.
If I assume the volume to be roughly half of those dimensions on
average, I get something like 8' x 1' x .4 = 3.2 cu ft of water. At 62
lbs/cu ft, that about 200 lbs.
I would imagine that it can handle 200 lbs, but what if I am away? It
looked like it could have gotten a lot larger.
My first thought was to install a row of 3-5 small grommets about
6-12" from the end of the awning. I wouldn't think a very big hole
would be needed. I'm not sure how to install them. Aren't they usually
snapped together by a tool that needs access to both sides and a solid
- posted 11 years ago