well - title pretty much lays down the question...
We have a 2-story house,
with the family room behind the attached garage,
and above a stone crawl space.
The other part of the house area has a full unfinished basement.
I've had extra insulation blown into the attic area above the family
but have done nothing in the crawl space under the family room.
This room seems to be a couple of degrees "different" from the rest of
Summer - it's not as cool with the A/C running.
Winter - it's not as warm with the furnance running.
Would laying some insulation in the crawl... help ?
along the sides - from foundation to where the floor meets the sides
under the floor - between the joists
If so - what kind of insulation and what kind of facing -
tnx for any comments - Phil -
You ask two questions.
Phil Schuman wrote:
Yes. More insulation always helps. I would start between the joists.
Use craft faced batts. Use the highest R value that will fit. You can
staple it up with a staple gun or they have metal wire about the
thickness of a coathanger that will "bow" between the joists using
tension to hold up the insulation. If you really want to go crazy you
could also screw up some foamboard insulation but I wouldn't. Also
insulate air ducts and pipe in the crawl space. Do this before
installing the batts for easy access.
Use the wire thingys. It's way easier and faster. Also, you can glue
to the concrete walls to assist with insulating. Additionally, cover the
the crawlspace with 6mil poly to cover the dampness issue.
I looked around at Home Depot today,
and they have the R-13 faced rolls -
It appears that the facing should be
facing the "warm floor",
with the bare fiberglass facing outside
toward the air -
Is this going to present an airborn problem
with the fiberglass particles wandering
thru the air in the crawl over to the basement area ?
hmmm - just read this article that basically says
the floor insulation is not worth the effort -
No you haven't been beat to it. This is about how to insult the
family room over the crawl space. Much like insulting the girl over
her boyfriend. Example: "of all the nice rooms in the house, you had
to pick a piece of dirt!"
Aside from an insulation issue, you may have an air infiltration issue. The
crawl space is probably vented to the outdoors and if there are large gaps
where the flooring meets the wall structures, you could have surprising
large air movement. On a really cold and windy days, you may feel drafts
down around the baseboards or anywhere there might be penetrations. If the
floor was old tongue & groove, there might even be air coming right through
the floor. If this is the case, insulation would help, but not eliminate
the infiltration, and something like Tyvek on the bottom of the floor joists
may also be needed. One of those energy consultant guys with the infrared
cameras could detail out the problems pretty fast.
Depending on where you are and your climate, you may want unfaced
insulation. With an air conditioned house in a humid climate, vapor
barriers are a bad and no longer needed acording to the new
International Residential Building Code. If you are up north, the
vapor barrier should be on the warm in winter side. Be careful with
adding foam insulation to fiberglass. You may create two vapor
barriers and trap moisture, creating a mold and wood rot problem.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.