Kneewall and radiant barrier?
I recently bought a house in Jacksonville, FL. Part of the attic is finished into a loft with a knee-wall construction. It got quite in the loft last summer relative to the rest of the house, and I’m looking at ways to cool it down a bit.
The existing knee wall is drywalled and filled with fiberglass batts, which are in good shape, but they do not have any additional barrier between the attic space. My research suggests one option I have is to install a radiant barrier overtop of the batts on the backside of the knee wall. I’m questioning the logic because ceilings typically only have insulation and no air or reflective barrier overtop.
Can someone please explain if the reflective barrier will work, and if so, why this isn’t done over ceilings as well?
GBA Detail Library
A collection of one thousand construction details organized by climate and house part