"Hoosierpopi" wrote in message
We have a one-story house with a full basement. The main floor is
built on 2x10 floor joists withthree-quarter plywood sub-flooring.
The basement "ceiling" is simply the underside of the main flooring -
exposed 2x10's about 7 ft ten inches above the concrete floor. I have
a fire place down there that houses a fire-box insert/stove wich I
used to generate a portion of the heat used in the colder months.
THere is also an oil-fired furnace at least 40 years old with metal
ductwork hanging beneath and (where running parallel with) between the
I've been thinking of installing insulation between the joists. My
first thought was to simply buy the 15" wide six-inch thick rolls and
staple the paper to the underside of the joists much like I've done on
the verticle walls we've insulated over the years. This would leave a
"ceiling," six inches of fiberglass, four inches of air
space and, finally the sub-flooring.
Then I recalled that the paper/moisture barrier was to face the heated
side of the structure (when doing 3.5" rolls in the walls) - our wall
studs are two by fours - not six inches!
Do any of you know 1. If insulation here Under the flooring) is a good
idea, and 2. if stapling batts or roll insulation as described is
"the" or "a" right way to go about it?
The next step would be to install drywall or similar paintable
material to achieve a white ceiling down there.
Thanks for the (anticipated) helpful feedback.
You wouldn't, typically insulate between two heated areas, unless for sound
I agree with FN's posts. Stud the basement wall and insulate the perimeter
of the house. You will gain valuable warmer basement space.