Insulating Window Frame
I'm in the process of replacing my 22yr old wood windows. I have a few companies come out to present what vinyl windows they have. Some companies have hollow chambers in the frame, and others fill the chambers with foam insulation.
One company told me the reason why some companies fill their chambers with the foam is because the pvc strength is low and filling the chamber will compensate for this. Is there any truth to this?
Insulated window frames
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