How To Keep Bugs From Coming Up Through Deck Floor

The crawlspace beneath is open as it is a post on pad foundation.

How to keep bugs from coming up through deck floor.

In order to effectively protect against bugs a screen porch must be completely enclosed but if your porch wasn t well built from the start it is often the deck floorboards that were overlooked. We have a porch that was built around an original deck. What kind of bugs and how high is the deck from the ground. My first thought was to lay marine grade plywood over the decking but given the potential for water to enter through the screen and lay on the floor i m a bit leery.

So it has the basic kind of 2 4 style decking on the floor. The underside of a deck can provide a nice shady area for a variety of crawling creatures to make their home. If you re concerned about bugs coming up from the gaps between floorboards you may want to place a screen under the deck floor. But there are little gaps in that floor and so even though the screens have been replaced around the walls of the screened porch and that s all tight i think maybe bugs are still coming in through the cracks.

This stops bugs from coming up through the floorboards of the deck. It seems screening the underside of the joists has the potential to trap debris that falls through the cracks.