On Mon, 05 Feb 2007 07:02:46 -0500, Nick Hull wrote:

In article 8Stxh.64371$h75.9365@trnddc01, "Mike"
wrote:
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.

I might suggest cutting 2" sheet styrofoam to fit against the floor
between the rafters. It will not interfere with subsequent wiring and
will make the floor a lot warmer. The gaps in the styrofoam are
insulated with wood 2x10s.

Check to see if code allows it.

Better to use a fire resistant material, like rock wool.

Joe Fischer