Converting deck into screened porch

IF it ever stops raining up here in Maine, and I manage to get the lawn mowed (now waist high). I'm hoping to start a deck/screen porch project. My plan was to frame and deck with plywood and drop a full sheet of linoleum over it before the walls went up. A neighbor gave me a pair of sash that are 5 ft wide ea so framed openings for windows would be screened but able to be closed tight to the weather with the sash. Hopefully the enclosure can double as a small greenhouse in early spring.

Some does depend on the nature of your bugs. Many folks around here have screened in porches with regular deck boards, and no bug problems. Our mosquitoes are the ankle biter types, so they don't fly up high enough. The flys and such fly to sun warmed surfaces, and the underside of a deck is not sunwarmed. So you get flies landing on the wall screens, but hardly ever flying up from the underside.

Lot of heat loss through those open slat floors. If you're considering storm windows for the future to make it a year round room, then sealing (and insulating) the floor becomes much more important.