Insulate Under Bay Window

I recently found the styrofoam under the bay was only press fit in some areas no fasteners held up by a friction fit on the back side of the lap siding.

Insulate under bay window.

This high performance thermal insulation board has 50mm of pir insulation. I ve written quite a few articles on how to insulate basement walls and floors but one more specific topic related to this subject keeps coming up and that s how to insulate a bay window floor or cantilever floor framing. Bay window and floor deck cantilever insulation details. I want to insulate outside under the bay but fiberglass insulation is too thick as i only have 1 1 2 between the bay ceiling to the bottom of the siding.

Side walls also need insulating if no cavity exists. Outside under the bay is open. The rim joist under the window appears to have only the 1 8 green foam vinyl and lap siding covering it no other insulation. Most people only insulate under the bay window.

Because it is difficult to properly insulate and air seal these areas without filling the cavity getting sufficient heated air in to warm these areas during the winter months can be tricky. Buy this item from amazon uk. And the farther a bay window protrudes from the house the more dramatic the effect and the more it opens a room. I have a bay window in my kitchen facing south that gets very cold on the floor during the winter months.

Celotex pl4050 is a thermal insulated plaster board. No vapour barrier is required and the foam blocks a considerable amount of sound transmission from the outdoors too. Either way filling the floor cavity with spray foam delivers excellent thermal insulation while also keeping drafts out of your bay window area. 50 mm celotex bonded to plaster board.

The problem of having cool floors under bay or bow windows and alcoves is a very common one. To be used under bay window.