Insulating Floor Joists Of Sunroom

Once your old floor is ripped out install a layer of polyethylene over the exposed dirt.

Insulating floor joists of sunroom.

Cut styrofoam insulation to the correct size and layer it. How to insulate a porch floor to make a sunroom step 1. Roll out the fiberglass insulation sheets between the joists facing side up making sure it is snugly in place. Keep this polyethylene in.

Secure this ply with screws driven down so they extend one inch into the deck floor. Install a vapor barrier to keep moisture and condensation off your insulation floor joists and the bottom of your. On top of the plywood or osb. Seal up the under side of your floor from the outside with some wire mesh to contain the insulation and keep.

Here are some steps you can take to insulate the floor of your sunroom. Use a vapor barrier to keep your floor above free from condensation caused by the new insulated area. The easiest neatest and least expensive option is to apply 2 inches of extruded polystyrene foam on top of the deck that forms the floor of the sunroom with a layer of 5 8 inch plywood installed over the foam to act as a subfloor. Score a line on the metal backing with a utility knife then cut along the line with a drywall saw to make.

You don t need housewrap above the joists but you do need to start with a layer of plywood or osb above the joists.