Would it be beneficial/adviseable to have insulation installed, such as sprayed in foam, in a crawl space? (open cell or closed cell?) Any
-home built in 1975 in Juneau, Alaska (1492 sf) -electric baseboard heating throughout the house -1 backup oil burning heater -I would also like to "firm up" the wood flooring and understand foaming has this residual benefit. -We intend to stay in this home.
First off the only foam that has a residual structural benefit is closed cell - with that I would firm up your floor properly with wood. In general: for the crawl - is it vented or sealed. If vented I would seal it up, & use closed cell around it & the rim joists. You will be able to add more there for less cost than doing the flooring & generally have better results. If it is sealed, take a good look at the job done & consider bumping the insulation up - it should also be closed cell (any place moisture could be an issue - closed cell) Your best bet - get a qualified independent energy auditor in there to take a look at the whole picture & make recommendations.