[Greenbuilding] Passive solar home--concrete overlay re thermal mass

[KTOT (g)]

If you can figure out where you saw that table—or multiple possibilities that I could research to find it—this would help me tremendously. I really, really need that table. So if anyone has ideas where I might find this or who might know about it, please let me know. Thank you.

From: Vadurro, Rob, EMNRD 
Sent: Monday, May 13, 2013 9:06 AM
To: topher at greenfret.com ; Green Building 
Subject: Re: [Greenbuilding] Passive solar home--concrete overlay re thermal mass

I believe the concern is the transfer of heat between different materials. I can’t remember where I saw it, but there was a table showing the transferring heat between base and finish materials, say tile to concrete slab below in passive solar conditions and the rate of transfer was much less than one might think. The joint between the two impeded the heat transfer, in other words. I would think an acrylic additive may impede the transfer even more. The best is always to not cover the slab, only color it, if heat retention in the slab is the goal.

 

Rob Vadurro, AIA

Park Architect

New Mexico State Parks

1220 South Saint Francis Drive

Santa Fe, NM 87505

505-476-3383

505-476-3361 fax

 

From: Greenbuilding [mailto:greenbuilding-bounces at lists.bioenergylists.org] On Behalf Of Topher
Sent: Monday, May 13, 2013 8:39 AM
To: Green Building
Subject: Re: [Greenbuilding] Passive solar home--concrete overlay re thermal mass

 

On 5/13/2013 1:07 AM, KTOT (g) wrote:

  Does anyone have experience or knowledge about this? Using or not using a concrete overlay product for the top layer of a floor for thermal mass, vs. a plain darkly stained concrete slab 


A concrete overlay product is likely to be roughly similar in thermal characteristics to a concrete slab.  Meaning that you will just have a thicker thermal mass.  It seems unlikely that you should be worried about too much thermal mass in a passive solar house.  The overlay product might have a lower specific heat, or conductivity, wither of which will reduce it's effectiveness somewhat.  Remember to stick with a dark color.

Thank You Kindly,

Corwyn



-- Topher BelknapGreen Fret ConsultingKermit didn't know the half of it...http://www.GreenFret.com/topher@greenfret.com

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