Hey guys, not sure if this belongs in here or on this forum at all. But since you're in and out of many crawlspaces I figured I'd give it a shot. The portion of my split level house over the crawlspace has floors that get cold as hell in the winter. Ive read 2 schools of thought on crawlspace insulation and wanted to hear your takes.
1. Treat the crawl like a small basement and insulate the walls with r13 batts hanging from the sill plate with a 8 mil vapor barrier on the floor. This to me looks like asking for trouble with moisture if the vapor barrier isnt perfect and possible attraction of termites. I would think that the rigid foam board would be slightly more suitable but don't know.
2. insulate between the floor joists with the paper side up and those spring loaded insulation rods. This would keep the floor warmer I think but would use a ton more insulation. You still have the critter issue to deal with. And your Vapor barrier to the living space is broken every 16 inches by the floor joist.
There doesnt seem to be any consensus on how to go about it and I was wondering what you guys see out there that is the best. Or what the latest school of thought was in new construction.
I should mention that I am in NJ near Philly, hot humid summers, cold but not Buffalo like - winters. Probably averages 28 or so.