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Old 01-26-2017, 12:31 PM   #1
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Heat Reflective Roof Paint

Has anyone nailed down a roof paint that seems to be the best ?
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Old 01-26-2017, 12:33 PM   #2
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Plain old flat white paint is the most reflective.
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Old 01-26-2017, 12:37 PM   #3
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Plain old flat white paint is the most reflective.
So it doesn't have to be any kind of special UV reflective of some special coating. Just a good flat white?
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Old 01-26-2017, 12:59 PM   #4
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All white paint is basically 90% reflective. Flat white has less chance of hot spots because it reflects it more uniformly.
https://www.thcfarmer.com/community/...ve-paint.4901/

96% Reflective Paint $32/ Gal. At Home Depot - General Growing Information - Michigan Medical Marijuana Association
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Old 01-26-2017, 01:59 PM   #5
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Those reflectivity numbers (given with paint codes usually and named LRV) are architechtural guide lines and are used to measure how bright surfaces will be once illuminated by a light source.

It doesn't pass judgement on the radiant heat being reflected which is what is interesting for roofing materials.

Just my 2 cents... ;)
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Old 01-26-2017, 02:08 PM   #6
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I used Rustoleum Professional 242256 gloss white oil-based enamel with Hy-Tech Thermacels ceramic insulation powder mixed into it, rolled on with a 4" short-nap roller. So far, so good. I don't know how much difference the pixie dust makes, but it can't hurt it, and any slight benefit is worthwhile.

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Old 01-26-2017, 02:42 PM   #7
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Quote:
Originally Posted by mrblah View Post
Those reflectivity numbers (given with paint codes usually and named LRV) are architechtural guide lines and are used to measure how bright surfaces will be once illuminated by a light source.

It doesn't pass judgement on the radiant heat being reflected which is what is interesting for roofing materials.

Just my 2 cents... ;)
There's a reason that southern regions have buses with white roofs and most of the ones from cold areas don't.

This is a pretty basic question/subject. It isn't rocket science.

https://www.scientificamerican.com/a...se-color-heat/
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Old 01-26-2017, 02:48 PM   #8
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Someone did an experiment on it. There is a thread somewhere.
Basically "white elasomatric white roof sealant paint" from Lowes or home depot was the best result for the money.

Search my profile, I can't get link from phone.

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Old 01-26-2017, 02:50 PM   #9
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Right. White elastomeric roof paint. Kool Seal is one brand but there are a ton of different brands. All pretty much the same.
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Old 01-26-2017, 04:38 PM   #10
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Smile Nice!

Quote:
Originally Posted by EastCoastCB View Post
Right. White elastomeric roof paint. Kool Seal is one brand but there are a ton of different brands. All pretty much the same.
Nice Information
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