Insulating The Floor Of An Open Porch

Large foam insulation sheets can be nailed directly against the floor above or held in place by chicken wire or other metal elements with the facing against the underfloor.

Insulating the floor of an open porch.

This can be stapled up between the floor joists. The friction between the sides of the batting and the studs will hold the insulation in place. Screw sheets of plywood to the underside of the joists to keep the insulation clean and protect it from wildlife. Roll out the fiberglass insulation sheets between the joists facing side up making sure it is snugly in place.

Crawl under your porch and install strips of batting between the floor joists the same way this time with the facing side upward. If you can crawl under your porch insulate from below by nailing plywood boards to cover any openings. My only worry is how best to go about doing this there are a couple of cables in the floor which go to outside lights. Sometime in the 1940s the previous owners had crudely enclosed this second floor porch with nine simple casement windows that open inward but there is no insulation nor any hvac in the enclosed porch.

Use a vapor barrier to keep your floor above free from condensation caused by the new insulated area. The room over the porch has always been quite cold and i was looking at insulating the floor of it using rockwool or similar. The job of insulating the floor is easier if there is room to crawl underneath but if there isn t it can still be done. The insulation should fit snugly to prevent air from getting through.

We are in the process of building a 4 season porch from the original open porch that came with our 1917 home in ne ohio. Make sure that you wear gloves and a mask for protection.