Waterproofing or Under-roofing a Back Deck

[ljh2]

I'd probably go with corregated steel or fiberglass under the deck at a slight slope. The steel tends to be a little more slippery so it will shed snow/ice better.

Larry

[Jeff396]

I actually got a mailer on a manufactured system similar to what you describe. They too a bunch of semi circle troughs (like a 1 foot diameter pipe cut in half lengthwise) and ran them from the house out pitched slightly down. At the end of all of them they fit into a gutter type device to take all of the water to one outer corner of the deck and another gutter to take it to the ground. It looked pretty nice from the bottom too. I guess you would also need some type of v shaped piece to put over the seams between the pipes to keep water from dripping through.

Jeff

[tpaulson]

These products allow you to create dry space under your deck.
http://www.dry-b-lo.com
http://www.dryspace.cc