We are first time home owners and we bought a ranch style home that was built in 1963. Our problem is that the bathroom and kitchen floor is VERY cold. If the floor isn't carpeted, then it is cold! The openings to our crawlspace are not open. Is it possible to insulate and how do you do it? Any advice is greatly appreciated!
If your crawlspace is accessable, 1/place a vapor barrier over as much of the ground as you can(a 6-mil poly works fine); 2/ Seal the vents air-tight; 3/ Insulate the foundation walls (Foam board insulation works good); 4/ make sure the box-sill (ends of the floor joists) are insulated (R-19 fiberglass is fine); 5/ include the crawlspace in your heating (your floor will only be as warm as your crawlspace is).
If you're not sure what to look for, ask someone you know to look in the crawl space and see if there is any insulation under the floor. If there is none, that's a good place to start. Rolled fiberglass insulation is not too expensive, but can be an effort to install - dirty overhead work. It's worth it, however.