EcoRenovator - View Single Post - Radiant barrier paint additive for exterior walls

gtojohn · 08-02-14, 10:36 PM

I ran few tests today. We had a lot of scattered clouds so conditions we less than optimal. However...Its not looking good. I have 4 equal sized pieces of ship lap. 1 original satin green, 2 green with ceramics, 3 aluminum radiant barrier base coat (somebody said this works) and 4 aluminum radiant barrier paint for proof of performance.
Siding was laid out together facing up in direct sun through out the day . There was an air gap underneath to simulate a hollow wall. I checked the temps off and on throughout the day with a IR thermometer with a fresh 9volt. Temps for 1-3 averaged within 1 degree of each other, 135f surface and 111f on the backside. 4 was up to 101f on the surface and a few degrees over ambient on the back. I might try the difference with the siding upright like its on the wall in case there's any difference. A gloss finish might help reflect more heat.

08-02-14, 10:36 PM	#10
gtojohn Journeyman EcoRenovator Join Date: Jul 2014 Location: Austin, TX Posts: 314 Thanks: 39 Thanked 50 Times in 45 Posts	I ran few tests today. We had a lot of scattered clouds so conditions we less than optimal. However...Its not looking good. I have 4 equal sized pieces of ship lap. 1 original satin green, 2 green with ceramics, 3 aluminum radiant barrier base coat (somebody said this works) and 4 aluminum radiant barrier paint for proof of performance. Siding was laid out together facing up in direct sun through out the day . There was an air gap underneath to simulate a hollow wall. I checked the temps off and on throughout the day with a IR thermometer with a fresh 9volt. Temps for 1-3 averaged within 1 degree of each other, 135f surface and 111f on the backside. 4 was up to 101f on the surface and a few degrees over ambient on the back. I might try the difference with the siding upright like its on the wall in case there's any difference. A gloss finish might help reflect more heat.