Why not remove batt insulation from basement ceiling joist bays?
August 13, 2012 1:19 PM Subscribe
I live in a 1993-construction modified cape-style house, in New England. Three floors, ~1900 square feet. The rim joists in the (unfinished, unheated) basement have been air-sealed with Great Stuff expanding foam. Do I really want or need fiberglass batting in the basement ceiling joist bays?
posted by ellF to home & garden (4 answers total)
This weekend, I discovered that the fiberglass batt insulation in the ceiling joist bays in the basement have a significant amount of rat/mouse dropping detritus in them. This, I assume, predates our ownership of the home, as well as the air sealing. There are no signs of rodents in the basement now, and we have cats.
Is there any reason to not simply remove the batt insulation and leave the joists exposed? Putting more fiberglass up seems like it would add minimal R-value to the house, and I suspect it actually makes it harder for the boiler and hot water system to do their job in the winter, as it effectively cuts the basement out of the thermal envelope. Am I missing anything, aside from the minimal soundproofing the insulation adds?