Spray Foam Insulation in the Band Board – Rim Joist pt1

Spray Foam Insulation in the Band Board – Rim Joist pt1


Today’s Professionals brought to you by
The Basement Doctor. Good morning everyone welcome to today’s professional
today a treat, The Basement Doctor with John Clements. John how are you? A treat I don’t know treat? Sure it’s always good to see you. People usually aren’t happy to
have me out to their house though. Well oh yeah unless you got good news.
Exactly and sometimes I do have good news sometimes. People always ask, they stop me on the street , they want to know if you’re good guy, I say yea. Well thank you I appreciate
that. I say the same about you. Well thank you very much. Let’s talk about
wintertime. Ok. It’s cold it’s nasty outside we just had the storms this past
week and a lot of people forget that their house gets cold or they walk into
the bathroom with the tile floor or the kitchen and it’s got the real floor yeah
and there barefoot and you know all sudden they start tap dance a little bit
because you get these cold floors. Yeah. One of the most neglected places of
insulation in a house is what’s called the band board or the rim joist and I
brought in a little sample of a portable one that we built to take to home shows.
Mm-hmm. What the rim joist is is the spot in your basement or your crawlspace
that’s on top of the block walls where your floor joists sit. Right. So for
example each one of these boards would represent a floor joist in the house. Yea
okay. And the area right along the backside that’s in between these joists
is called the rim joist. Okay. Twenty percent of the air loss in a house comes
from that area. Really? A house breathes and what’s called the stack effect and
the simple explanation if you take a balloon and you blow it up you’re
holding the holding it tight down here when you open it up all the air gets out
and the balloon collapses. Right. Your house doesn’t collapse when it loses air
that air has to replace itself somewhere and where a lot of that comes
in at is right through this area when it’s not insulated. It draws the air in yeah. So a
lot of people will have this wonderful fiberglass insulation. Right. It is not an
airtight seal it can sometimes absorb moisture and promote mold growth like
you see the dark spots over here. Yeah. What I recommend is this here it is a
two-part close cells polyurethane spray foam and
it actually creates an airtight seal so that there is no air penetration through
the rim joist and it seals everything real solid for you. We did an energy audit on a house that was built in nineteen sixty-two and all we did in the entire
house was treat the rim joists we’re averaging a 16 point nine percent
savings on the annual heating and cooling bill. That’s substantial, that’s very good.
You’re gonna talk about this next week too? Yeah. Okay.

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