Insulating A Bay Window Floor

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Insulating a bay window floor.

Consumes 2 to 3 times more energy than needed mainly because of insufficient insul. Then seal the perimeter gap around the rigid foam using a can of expanding polyurethane foam. Discussion starter 1 aug 23. Be sure to seal this piece to all the framing and foam.

Again seal this piece around the sides and bottom. That way the heat in that ceiling can keep the floor above warm er. The smooth surface between the floor joists is cardboard laying loose on top of the t g flooring. The windows during winter were always covered in water.

Now it has started getting colder some condensation is coming back on our bay window which is in our bedroom north facing. Two layers of 2 inch foam delivers r 20 which is a good minimum level for a floor like yours. Joined aug 23 2015 3 posts. Six mil polyethylene sheathing used for an air vapour barrier over the walls is extended up between the joists and normally caulked and stapled to the insides of the joists and underside of the.

Also added 2 pics under the bay window showing the white vinyl siding 1 8 green foam sheet insulation brown lap siding heavily weathered white trim board and 1 2 white styrofoam. Insulating cantilever floor in a bump out bay window. Install fiberglass or cellulose insulation in the joist bay. Use hot melt glue or construction adhesive to hold the foam to the underside of the subfloor.

Oct 14 2014 insulating a bay window floor cantilever floor can be challenging. We had them all changed to double glazing this year. After all those steps you can install the deck sheathing. Install a final piece of xps or polyiso on top of the fiberglass or cellulose.

Learn how to with new construction and renovating existing work. I bay window bump out with a 2 foot exterior cantilever subfloor extending over the basement foundation wall.