I want to insulate the bottom of this bay window after i repair the sill.
Insulate below bay window.
The panes of glass used to create such windows as.
And the farther a bay window protrudes from the house the more dramatic the effect and the more it opens a room.
A bay window juts out and away from the house usually in a semicircular form much like an observatory window.
Never having done this i want to make sure what i plan to do makes sense and there are no gotchas.
Either way filling the floor cavity with spray foam delivers excellent thermal insulation while also keeping drafts out of your bay window area.
New construction bay window floor overhang insulation detail.
The sketch above shows one method for insulating the deck overhang at a bay window or cantilever that encloses a bump out.
The problem of having cool floors under bay or bow windows and alcoves is a very common one.
Consumes 2 to 3 times more energy than needed mainly because of insufficient insu.
No vapour barrier is required and the foam blocks a considerable amount of sound transmission from the outdoors too.
How to seal a leaky bay window.
This is a great example of how to insulate a bay window.
Bay windows are one of the more complicated window styles to install but their impact is well worth the effort.
This type of window protrudes from the house while also letting in lots of light.
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.
Quite often the insulation in this area is dealt with long after the framing is finished and results in a very cold drafty spot in the house.
The bay window below needed 8 panels cut 600mm wide then 2 smaller width ones at the ends.