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#6298617 - 08/10/18 11:31 AM Insulation Experts ??
bass10 Offline
trapper

Registered: 03/17/09
Posts: 609
Loc: Akron, Ohio
Guys I am not a builder and learning as I go on my cabin build. I have started a cabin with a small foundation crawl space. I took some of the left over morter and filled in some of the blocks down to the footer and some were already filled with the bolts. I am putting green board styrofoam on the outside down to the footer as well as the inside before I vapor barrier it and scratch coat. A buddy stopped by and said if I wanted to further insulate the foundation theres a product out made of plastic resin that I could pour down the cavity. So this got me thinking could I fill each remaining block with Styrofoam packing peanuts? Would this help any at all or hurt any at all or a total waste of time?


Edited by bass10 (08/10/18 11:31 AM)
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#6298631 - 08/10/18 11:54 AM Re: Insulation Experts ?? [Re: bass10]
white17 Offline

"General (Mr.Sunshine) Washington"

Registered: 03/17/07
Posts: 25014
Loc: McGrath, AK
It MIGHT help but may be so slight that it isn't measurable. I suspect that if you have foam board inside and out..that the dead air space inside the blocks is just as good as filling them with peanuts or ghost poo.
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#6298637 - 08/10/18 12:13 PM Re: Insulation Experts ?? [Re: bass10]
hippie Offline
trapper

Registered: 02/22/10
Posts: 5568
Loc: pa
I'm not a builder either, but am thinking like White17.

I built my own garage and on the front wall i filled the blocks with concrete incase someone bumped into it with a car.

That wall is alot colder to touch than the side walls that are without anything in them.
A dead-air space is pretty good, under a vaccume is even better.

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#6298648 - 08/10/18 12:21 PM Re: Insulation Experts ?? [Re: bass10]
NEYotetrapper Offline
trapper

Registered: 12/10/16
Posts: 383
Loc: NE
Peanuts will provide little benefit.

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#6298684 - 08/10/18 01:51 PM Re: Insulation Experts ?? [Re: NEYotetrapper]
bass10 Offline
trapper

Registered: 03/17/09
Posts: 609
Loc: Akron, Ohio
Thanks guys I was thinking the same as the air may actually be a better insulator?
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#6298712 - 08/10/18 03:16 PM Re: Insulation Experts ?? [Re: bass10]
cotton Offline



Registered: 12/22/06
Posts: 5167
Loc: Piney va. soon be 19
what white17 said wink
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#6298772 - 08/10/18 05:08 PM Re: Insulation Experts ?? [Re: bass10]
Lugnut Offline
trapper

Registered: 12/23/06
Posts: 7069
Loc: SEPA
Korfil makes polystyrene inserts for standard size CMU's that offer about R5 per inch . You buy the insulated CMU's with the inserts already installed. I have laid them occasionally. That doesn't help you since your block are already laid.

I have more often have filled cores with perlite which is commonly used as insulation in CMU's. With an 8" standard block you can bump your R value from 1.96 to 3.26, R2.08 to R3.82 with 10" block and R2.14 to R4.32 with 12".

It costs about $5.00 per 4 cu. ft. bag.

I agree with White, I don't think packing peanuts would make very good insulation. Some of the newer ones are even biodegradable. The polystyrene boards are a good choice for your application.



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