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-   -   Insulating a Floor From the Basement (http://www.diychatroom.com/f103/insulating-floor-basement-165014/)

JohnC20 11-28-2012 05:37 PM

Insulating a Floor From the Basement
 
Hi!
Going to help a friend with cold floors on the first floor of his home. We plan to insulate the floor from below by accessing the unfinished basement.
My question is what type of insulation? Foil or paper? Also, thinking r19. Any suggestions? His house is in upper Westchester NY.
Thanks!!

joecaption 11-28-2012 05:43 PM

http://www.energystar.gov/index.cfm?...sulation_table

Has it been air sealed?
Are all the foundation vents closed?
If this is a crawl space is there a vaper barrier on the ground?
You need to go back and add your location to your profile.

JohnC20 11-28-2012 05:47 PM

Quote:

Originally Posted by joecaption
http://www.energystar.gov/index.cfm?...sulation_table

Has it been air sealed?
Are all the foundation vents closed?
If this is a crawl space is there a vaper barrier on the ground?

No no and no! Lol. The home is about 80 y.o. And it leaks air like a flat tire. No vapor barrier. Which is why I asked about foil or paper backed. The basement is unfinished, cobble stone walls.

joecaption 11-28-2012 05:57 PM

Ballon wall constrution, old leaking windows, almost no insulation in the attic, may or may not even have insulation in the walls, non T X G 1 X6's or hardwood installed with no subflooring?
God I love an old house, ching, ching. All I see is dollar signs.

JohnC20 11-28-2012 06:54 PM

Quote:

Originally Posted by joecaption
Ballon wall constrution, old leaking windows, almost no insulation in the attic, may or may not even have insulation in the walls, non T X G 1 X6's or hardwood installed with no subflooring?
God I love an old house, ching, ching. All I see is dollar signs.

Glad it's my friends!!

Fix'n it 11-28-2012 09:29 PM

Quote:

Originally Posted by joecaption (Post 1062547)
Ballon wall constrution

not all old houses are balloon. mine isn't, and never has been. its at least 80 years old.

jklingel 11-29-2012 01:55 AM

if the basement is conditioned (heated), fiberglass is ok, but roxul is better. if the basement is not conditioned and you can get to flat floor joists, fill them w/ batting if you want to and then cover them w/ rigid foam and tape/goo the edges. any batting in between joists leaves their edges cold, and you could get condensation on them. the rigid foam prevents that.

JohnC20 11-29-2012 07:06 AM

Quote:

Originally Posted by jklingel
if the basement is conditioned (heated), fiberglass is ok, but roxul is better. if the basement is not conditioned and you can get to flat floor joists, fill them w/ batting if you want to and then cover them w/ rigid foam and tape/goo the edges. any batting in between joists leaves their edges cold, and you could get condensation on them. the rigid foam prevents that.

Wow.. Ok. Not sure if he wants to spend the money on the foam... Thanks!


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