No Insulation Under Bay Window

I could lie under the bay and see the subfloor in the diagonal portions of the bay.

No insulation under bay window.

For this particular project dr. The house was built in 1943 and had no insulation under the bay. Energy saver chose to insulate the bay window sill with silverglo rigid foam board insulation. This could be either polyurethane which i have lots of good personal experience with or icynene which i m still learning about.

Tack insulation under the window. Silverglo is a graphite infused insulation board. Set your store to see local availability compare. Attach the framing to the underside of the window using screws.

This high performance thermal insulation board has 50mm of pir insulation bonded to 12 5mm tapered edge plasterboard. Bore holes in the plywood so you can tighten the cable nuts later if needed. V 4500 series tan vinyl bay window model thdjw139600067 1 401. The rim joist under the window appears to have only the 1 8 green foam vinyl and lap siding covering it no other insulation.

V 4500 series black finishield vinyl bay window model thdjw139600071 1 401 20 1 401 20. 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. A cold window in a warm room creates a convective loop which in turn contributes to even greater discomfort. My wife and i recently bought a rental property with a cantilevered bay window.

Cut a piece of plywood to cover the bottom. What walls needs insulation. Consumes 2 to 3 times more energy than needed mainly because of insufficient insu. I was able to put at least 4 inches of xps and sometimes 6 inches under each section of the bay.

Side walls also need insulating if no cavity exists. 50 mm celotex bonded to plaster board. To be used under bay window. Either way filling the floor cavity with spray foam delivers excellent thermal insulation while also keeping drafts out of your bay window area.

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