Insulate Below Bay Window

This is a great example of how to insulate a bay window.

Insulate below bay window.

Bay windows are one of the more complicated window styles to install but their impact is well worth the effort. 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. I am thinking of putting 4 thick foam insulation under it cover that with plywood and finishing off with trim boards around the bottom to hide it.

The bay window below needed 8 panels cut 600mm wide then 2 smaller width ones at the ends. The problem of having cool floors under bay or bow windows and alcoves is a very common one. I want to insulate the bottom of this bay window after i repair the sill. The rim joist under the window appears to have only the 1 8 green foam vinyl and lap siding covering it no other insulation.

The panes of glass used to create such windows as. A bay window juts out and away from the house usually in a semicircular form much like an observatory 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. Never having done this i want to make sure what i plan to do makes sense and there are no gotchas.

New construction bay window floor overhang insulation detail. How to seal a leaky bay window. This type of window protrudes from the house while also letting in lots of light. The sketch above shows one method for insulating the deck overhang at a bay window or cantilever that encloses a bump out.

Consumes 2 to 3 times more energy than needed mainly because of insufficient insu.