I'm not sure what you mean by "there is a deck below this one." You mean there are two decks, one deck up top and the other down below? In that case, all you can do is sweep it. :-)

If there's no deck below (and thus you don't need constant access), lattice is the most common thing to use. It's cheap, easy to install, and you can even remove it if you're careful.

I am getting the feeling I don't understand your problem though. Are you looking for something permanent or just a cover of some kind?

Yes there is a deck above and a deck below. I would like to cover the underneath part of the above deck. I do sweep, constantly, and have to sweep the underneath part of the above deck, thus getting spiders and webs and debris from the above deck all over myself. I was hoping that there was some solution to this nasty problem.

Thanks.

You would need to look at Under-the-Deck Drainage Systems there are a few to look at on the decks-ca site link page. http://decks-ca.com/Deck_Links.html

http://www.altereagle.com/

http://decks-ca.com/

http://kingofcrown.com/

http://installcrown.com/

Alter Eagle Construction & Design