[Equest-users] Ceramic Insulating Paint Additives

[Roselin Osser]

Federico,

I thought I should share this article about ceramic "insulating" paints from
GreenBuildingAdvisor.com.  The author had done significant research pointing
to his conclusion that insulating paints are a scam.  Apparently they do not
qualify as low-e coatings either.  It's worth reading the comments at the
end as well, where various people likely to be associated with the product
attempt to argue with Holladay's points but provide no scientific evidence
of their claims.

http://www.greenbuildingadvisor.com/blogs/dept/musings/insulating-paint-merc
hants-dupe-gullible-homeowners

And this one:

http://www.greenbuildingadvisor.com/blogs/dept/musings/insulating-paint-sale
sman-tripped-his-own-product

Hope this helps.  

Rosie

Roselin Osser, BEMP, LEED AP
Building Science Corporation
30 Forest Street
Somerville, MA  02143
978-589-5100 x 5284
fax:  978-589-5103

Building Science Corporation
Somerville MA  |  Waterloo ON
www.buildingscience.com


-----Original Message-----
From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Bishop,
Bill
Sent: Tuesday, August 09, 2011 9:16 AM
To: Sami, Vikram; steinvor at msu.edu; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Ceramic Insulating Paint Additives

Federico,

I have no experience using ceramic paint additives. This document provides
some engineering background, and also concludes that, "the benefit of this
product over time on exterior walls... very likely may be small.":

http://www.energy.wsu.edu/documents/AHT_Insuladd%5B1%5D.pdf%20Ceramic-ba
sed%20paint%20additive.pdf

You can, however, try modeling this in eQUEST. Using the values discussed in
the link, adjust both the absorptance and emissivity of the walls.
ABSORPTANCE - CONSTRUCTION is a property of the exterior wall construction.
OUTSIDE-EMISS - EXTERIOR WALL is under the Daylighting - Shading - Other tab
of each wall surface.

You will probably find that the energy impact is minimal, and therefore not
cost-justified. Appendix G only allows for different absorptance
(1-reflectance) for white/cool roofs, and does not address emissivity.
Therefore, I think you would have to submit a CIR with good supporting
documentation to justify using different absorptance and emissivity values
for the Proposed and Baseline exterior walls.

Regards,
Bill


-----Original Message-----
From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Sami,
Vikram
Sent: Monday, August 08, 2011 9:56 PM
To: steinvor at msu.edu; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Ceramic Insulating Paint Additives

I'm pretty sure the ceramic additives do not really affect R-value. They
affect the emittance of the paint surface (low-e paints use this). As far as
I know you cannot account for surface emittance in eQUEST.

I'm not saying that it doesn't work or it doesn't have benefits - however
you need to be careful when you mix thermal metaphors. It may be ok to
assume an added R-value for this paint, but I doubt it. Its probablye more
effective in hot climates than in cool climates - but additional R-value
will have more effect in cold climates than in hotter ones. (this is a guess
- I haven't done any simulations to support this).

Other simulation programs like E+ or IESVE might be able to simulate
emittance better, but I can't speak to that.

Good luck.

-Vikram

________________________________________
From: equest-users-bounces at lists.onebuilding.org
[equest-users-bounces at lists.onebuilding.org] On Behalf Of steinvor at msu.edu
[steinvor at msu.edu]
Sent: Monday, August 08, 2011 7:58 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Ceramic Insulating Paint Additives

Hello:

Has anyone tried a simulation with insulating ceramic paint additive?
How does USGBC think about this for LEED? How is the R value defined?
I appreciate any comment or suggestion about this.

Thanks!

Federico

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