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Old 07-17-2014, 10:32 PM   #51
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Re: Insulating paint beads: Feedback from REAL people please

That's so surprising and SO helpful. Thank you.
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Old 07-18-2014, 08:10 AM   #52
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Re: Insulating paint beads: Feedback from REAL people please

thank you jatsy for taking the time to experiment. its folks like you prove there are still great people left in the world. most are too busy, too big a hurry or wouldnt give someone else the time of day. thanks again for sharing time and expense so we can save same!
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Old 07-18-2014, 10:33 AM   #53
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Re: Insulating paint beads: Feedback from REAL people please

Jazty, hats-off to you for the thorough experiment. I am a little surprised at the sawdust result. Leads me to believe that just about any material that creates additional surface area would help. Looks like there is an opportunity here to find something cheaper than the beads that works better, more like the sawdust. The counter is additional cost, weight, potential degradation of paint life/performance, and possibly increased drag over-the-road. Maybe a business opportunity....
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Old 07-18-2014, 01:09 PM   #54
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Re: Insulating paint beads: Feedback from REAL people please

Thanks for the kind words everyone!

It's a bit warmer today. 24.5C

- Off-white paint: 43.3C
- Black paint: 57.1C
- 4 coats Solarflex roof paint: 34.7C
- 2 coats Solarflex roof paint: 36.9C
- 2 coats Solarflex roof paint + Hytech beads: 35.5C
- 2 coats Solarflex roof paint + sawdust: 32.4C

Sawdust is still kickin' ass
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Old 07-18-2014, 03:46 PM   #55
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Re: Insulating paint beads: Feedback from REAL people please

Jazty, one question: I noticed that the sawdust panel appears to be the closet to the ground in one of the photos (the one where your assembly is vertical). Are your panels all horizontal while you are measuring? Thanks!
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Old 07-18-2014, 04:38 PM   #56
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Re: Insulating paint beads: Feedback from REAL people please

Yes. The rig is place across two saw-horses. I'll post a picture in a bit.
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Old 07-18-2014, 04:45 PM   #57
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Re: Insulating paint beads: Feedback from REAL people please


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Old 07-19-2014, 11:41 PM   #58
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Re: Insulating paint beads: Feedback from REAL people please

Awesome, thanks for clarifying. I presume the test rig is in 100% sun when you are testing? Looks like you have some spotty shadows over the rig in your latest pics. Just trying to think of anything at all that might impact you results. Are your sample pieces physically touching each other? That would also be a no-no.
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Old 07-20-2014, 09:52 AM   #59
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Re: Insulating paint beads: Feedback from REAL people please

Quote:
Originally Posted by IronChariot
Are your sample pieces physically touching each other?
If you look closely at the last pic of the test pieces, you will there is a gap between the pieces. All in all, I think this was a very enlightening test. For starters, there was really very little difference between the various reflective paints although a pretty good difference between reflective paints and a white roof. That said, I think that no one should expect to only use reflective paint alone to reduce heat. I still think that Super Insulating the Roof is the best way to go as you would not only get maximum insulation added but also creat much needed interior/exterior thermal breaks and then use the reflective paint on top of all that. I'm still not sure I can get David to go that route... yet. We only have three coats (one 5 gallon bucket) of Henry's SolarFlex on our bus and really need another 5 gallon bucket spread around. Yesterday we were checking it out and touched up a couple of places where it had been scratched thru to the metal. I'm guessing from one of the tree limbs that we are parked under. It did scrub back white in the places I needed to patch up (also recoated part of a seam as it had a crack in it... not leaking, the coating had a 6" long hair line crack and I was up on the ladder anyway with the bucket of goo). Boy, the roof is filthy! All the birds roost in the trees and poop all over the bus, then add in the debris and dirt from the trees and the dust from the dust storms and it's a filthy mess. I wonder if we should run it thru a car wash at some point. But it's not going to reflect the heat back if it's so filthy. Hey! A NEW TEST!!!!! Now you can do a dirty roof test VS clean roof.
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Old 07-20-2014, 11:49 AM   #60
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Re: Insulating paint beads: Feedback from REAL people please

Quote:
Originally Posted by IronChariot
Awesome, thanks for clarifying. I presume the test rig is in 100% sun when you are testing? Looks like you have some spotty shadows over the rig in your latest pics. .
Yes, of course. Testing was done between 2-4. The picture I posted of the test rig was taken in the evening, hence the shadows.
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