Adding Rigid Foam To Existing Interior Walls. Foam insulation is probably the best retrofit choice in terms of avoiding wall damage. The crew uses utility knives with extendable segmented blades to cut full depth on short cuts and when cutting sheets in place.
We understand our walls will get thicker by almost 4. If youd like to read about that experience you can do so in these three posts. This created a small air gap just in case any moisture like rain somehow manages to get into the wall assembly in the future.
I screwed the foam right up against everything and when I was done with that I taped all the seams.
Insulate the walls of an existing home by removing the existing cladding and installing rigid foam insulating sheathing to upgrade the major building enclosure. You can install rigid foam on the inside of a wall as well but adding exterior foam increases the R-value of a wall or roof without eating up interior living space. Rigid Foam Insulation Not only does it provide high R-values but foam board insulation is also easy to install lightweight and can be used in any room of your home. Install the rigid foam panels around all flood vents and seal the perimeter of the vents with expansion foam sealer or caulking to prevent air leakage.