I have a 1950s bungalow that sits on a crawl space. The crawl space is vented and has moisture problems (which I should/will fix, but that's not the main point of this question). R19 insulation is installed between the floor rafters. Some of the floors sit on OSB, while the older/non renovated parts sit on slat subfloor.
The floors are extremely cold and drafty. What are my options to keep the floors warmer and less drafty in the winter?
Will crawlspace encapsulation help? What would be the most effective solution to fixing the cold/drafty floors?
Best Answer
Cap the floor joists with rigid insulation. I'd first make sure the existing insulation is completely filling each joist bay and as expanded as possible (no edge curls, gaps nor compressed sections). Remember, the paper vapor barrier should be facing the living space you are heating or cooling. For a truly draft-free seal there is now a spray foam kit sold for the DIY home owner. Same 2 part spray foam that is used by commercial insulation installers, but in smaller amounts.