"Eagle" wrote in
:

Ralph Mowery explained :
"Boris" wrote in message
09.88...
I live in an elevated rancher built in 1978. I just removed
carpeting
and linoleum from my breakfast room, kitchen, dining room, and
living room, all of which are open to each other. I had 3/4" red
oak planking installed over the existing plywood subfloor.

Winter season has come, and it has been unseasonalbly cold, and I
really notice it in the rooms mentioned above. I don't know if it's
because the wood transfers hot/cold more than what was on the
floors, or because of the really cold weather. I'm in the S.F. Bay
area, where winters are normally mild (40 - 50), and my furnace
usually heats the house fine, but now it takes an hour or so to heat
the house (20 year old gas heater, forced air, below in the garage).
When I wake in the morning, the house is 56 - 60, and overnight
temps were mid-30's to low 40's.

I'm considering insulating the crawlspace under the house, under the
new wood flooring. I have good access to all areas under the new
wood flooring, and to all exterior walls. I can walk under the
entire area. The floor joists are 2 x 10 (1 3/4 x 9), and the wall
studs are 2 x 4 (1 3/4 x 3 1/2). I've been reading a lot about
insulating crawlspaces, and some say just need to insulate between
all the joists, and others say best to insultate just betwee the
studs. Of course, doing just the studs would be much easier, since
it's doesn't have to be 'hung', and less expensive, since the
insulation wouldn't have to be as thick.

Any suggestions?

YOu did not mention the insulation over head. If it is less than
about 8 to 10 inches, start there. Then to the walls and last the
floors.. Do be sure that the vents under the house are closed so the
air does not just flow under it.

What if you don't have vents under the house, just a concrete slab?


Vents are to move air to control moisture in dirt crawlspaces. The
moisture comes from the ground. You shouldn't have any moisture issues.