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Forums > Green Building Technologies > Radiant Heating > Subject: Looking for a lightweight concrete mix

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jasahlUser is Offline
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Posts:3
01/27/2006 4:18 PM  
My wife & I were building our own house - and doing just about all the labor ourselves.

Anyway, we were looking for a recipe for a lightweight concrete mix that works well w/ RFH. Most of the lightweight mixes I've found touted their INSULATING value - even mixes containing pumice.

I would think pumice would be good for RFH since it is often used in grills to retain & radiate heat.
UnregisteredUser is Offline
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Posts:2321
01/27/2006 6:22 PM  
Why worry about lightweight . If it is a grade floor use regular concrete & get the benefit of a heat sink. Check out Legalett
http://www.legalett.ca/Index.htm A lot of the installation work can be done by yourself but you have a professional system with drawings for building inspector
jasahlUser is Offline
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01/27/2006 6:48 PM  
It's not an on grade project, otherwise I would go w/ regular concrete. This would be a first & second floor project.

My floor system is 2x12 hem fir 16" OC w/ 3/4" ply subfloor. The span is just under 14'.

I'd be fine w/ regular concrete on the first floor, but the second floor concerns me because I have a couple of large rough openings (one patio door & one large window) each w/ triple 2x10 headers. I'd feel more comfortable using something closer to 120pcf than 150 pcf.
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02/01/2006 10:15 PM  
We use aerated cellular gigacrete. It can be stamped, textured, troweled---otherwise, left as the finish floor---thus making it cheaper than some that need covered with carpet or what have you. It takes stain well.
At 75% debsity it weighs 90 lbs per cu. ft.
Jonathan Hampton
www.gigacrete.com
702-643-6363
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Forums > Green Building Technologies > Radiant Heating > Looking for a lightweight concrete mix


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