In process of renovating and trying to do some of the work myself.
Insulating under bay window forum.
Insulating cantilever floor in a bump out bay window i bay window bump out with a 2 foot exterior cantilever subfloor extending over the basement foundation wall.
I would like the underside of the bay to look nice.
Buy this item from amazon uk.
The plaster was loose underneath the bay window in my 1940s semi.
Insulating a bay window.
Basically the bottom of the bay window is un insulated and is causing condensation to form on the wood as its warm inside and cold outside.
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.
6 march 2010 at 9 35am edited 30 november 1 at 1 00am in in my home includes diy moneysaving.
5 replies 7 4k views dander forumite.
50 mm celotex bonded to plaster board.
I have removed the plasterboard and there is a 75mm airspace then roofing felt and the back of the external render.
I have a bay window in my kitchen facing south that gets very cold on the floor during the winter months.
I need to insulate the wall under a bay window.
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.
Always remember anyone can post on the mse forums so it can be very different from our opinion.
The sketch above shows one method for insulating the deck overhang at a bay window or cantilever that encloses a bump out.
Side walls also need insulating if no cavity exists.
Found that my bay window is completely uninsulated so want to get this sorted whilst i have all the plaster off.
New construction bay window floor overhang insulation detail.
Outside under the bay is open.
Most people only insulate under the bay window.
So once i d ripped out the lath and plaster i wanted to the opportunity to insulate the bay before it is replastered.
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.
My first post here.
So it would be great to get some advice on how to do this.
The area in the basement is finished but i can access the subfloor from inside the basement and i also am able to remove the soffit from the outside.
There appears to some kind of felt exposed now see pics below.
I have only just found this forum so have already done quite a bit but want to check i have done it right before i finish the job.
