On Feb 4, 6:22 pm, "Mike" wrote:
"Mike" wrote in message

news:8Stxh.64371$h75.9365@trnddc01...

Hi, I want to insulate the ceilimg in the basement of my house. The
ceilings are about 7' high or a little lower.
It consist of exposed rafters 10" high 2" thick and spaced 12" apart above
that is wood subflooring the finished flooring.
This summer I'll be installing some wiring below the floor so whatever I
install now I'll have to remove some of it for the wiring installation
this summer.

Thanks,

Mike

I neglected to state I live in the mid atlantic region, Baltimore, and there
is no furnace in the basement only a gas fired water heater for a heat
source. Earlier today the temp was 48 degrees in the basement. It's got
electric baseboard heat
but I only use it when the outside temp is below 20 degreee F for extended
periods.



Typically, if you will be heating all the spaces in your house there
is no reason to insulate between heated spaces.

Unless, of course, you want to have a different heating/cooling zone
for each or if it is for sound proofing.

But if your joist are really 12 inches apart (that is a bit unusual
they are normally 16 inches apart) I suppose buying an R30 unfaced
fiberglass insulation for ceiling joist that are set 24 inches apart
and cut it in half long ways.

You should have little waste that way.

If you feel you don't need that much insulation you can save a ton of
money going with R19 or R13.