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Best Floor Insulation? RO 04-03-2008
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Posted by S. Barker on April 3, 2008, 9:29 am
WHY? Heat travels up. Are you trying to prevent ground heat from entering
the house?

s

> When I built my house I insulated the the floor with R19 fiberglass batts.
> Rodents have - over the years - torn must of it down. I want to insulate
> once more and never again after that. What would be a better way to go?
> My floor joists are 2x10's.
>
> Thanks,
> RO
>
> --
> Robert Olin
> Bob's Water & Septic LLC
> jolin@whidbey.net
>
>
>



Posted by RicodJour on April 3, 2008, 9:37 am
> WHY? Heat travels up. Are you trying to prevent ground heat from entering
> the house?

That is not true. Hot air rises due to convection but heat radiates
in all directions.

R

Posted by S. Barker on April 3, 2008, 10:10 am
Yes, but insulating a floor never pays back. It's a waste of time and
money.

s

>> WHY? Heat travels up. Are you trying to prevent ground heat from
>> entering
>> the house?
>
> That is not true. Hot air rises due to convection but heat radiates
> in all directions.
>
> R



Posted by dpb on April 3, 2008, 10:20 am
S. Barker wrote:
> Yes, but insulating a floor never pays back. It's a waste of time and
> money.


That's simply a false over-generalization.

hAdT knows no difference between down and up or sideways...

--

Posted by RicodJour on April 3, 2008, 11:10 am
> Yes, but insulating a floor never pays back. It's a waste of time and
> money.

Based on what time and energy cost assumptions are you basing that
particular gross generalization? I'd imagine that floor insulation
life would be on the order of several decades, and unless you've got a
Mr. Fusion cranking away to keep you warm, I doubt that energy costs
are going to go down in the foreseeable future. There's also the
issue of comfort. A warmer floor is more pleasant to walk, keeps your
whole body warmer, regardless of time and money invested, and cuts
down on drafts - a major source of heat loss and discomfort.

R

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