Exterior XPS upgrade on a manufactured home?
We are replacing the siding on a double-wide manufactured home, and so think it might be a good idea to add a layer of 1.5’ XPS to the exterior walls at the same time. However, we will not be changing the windows (recently installed, but lower quality double-pane gas-filed vinyl sliders), nor updating the floor or roofing assembly. (The installer sticker in the electrical box claims R-38 in the ceiling, R-36 in the floor, and R-21 in the walls–and the insulation seems pretty well installed.)
Can this home benefit from the added XPS on the exterior walls with the existing windows and flooring and roofing assemblies? Or, is this degree of insulation a waste if the windows and entire envelope are not upgraded? Thanks!
GBA Detail Library
A collection of one thousand construction details organized by climate and house part