01-06-2021, 08:48 AM
(01-06-2021, 08:31 AM)crokett™ Wrote: This must be location dependent. Here, you either insulated between the joists, or you insulate the foundation perimeter and line the floor with plastic, but you don't do both. My county at least prefers that the foundation perimeter is lined rather than insulation in the crawl space. Also, cold floors IMO the insulation won't do much. Heat rises. You're not losing a ton of heat through the floor. A much more effective solution is to figure out how to heat your floors. I've no idea what kind of flooring you have and if there are any products that could go in the crawlspace between joists. In-floor heat is usually done on top of the subfloor and under the flooring.
Good points on the heat rising. There's 4 main rooms (living room, 2 bedrooms, kitchen... plus the bathroom). The bathroom is ceramic tile and the kitchen is several layers of vinyl flooring. The other 3 rooms and hallway are red oak flooring. This house was built before they used osb/plywood as the flooring, so it's essentially 1x4's, then the oak flooring. Since it's a vented crawlspace, my thought was there is air creeping between the cracks of the boards. I feel like the 2 bedrooms were warmer when they had carpet and padding down. (of course they look a LOT nicer now!)
Coliin