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Old 07-15-2014, 10:31 PM   #41
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Re: Insulating paint beads: Feedback from REAL people please

Quote:
Originally Posted by jazty
The sawdust is pretty rough since I didn't bother sifting to get only the real fine dust. There are a couple of chunks stuck in it. It actually looks a bit like stucco. If I would have eliminated the bigger chunks it probably wouldn't be all that bad. It's not really practical at any rate, though, since wood absorbs water.
Try sand?
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Old 07-15-2014, 11:08 PM   #42
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Re: Insulating paint beads: Feedback from REAL people please

Quote:
Originally Posted by Das Mel
Quote:
Originally Posted by jazty
The sawdust is pretty rough since I didn't bother sifting to get only the real fine dust. There are a couple of chunks stuck in it. It actually looks a bit like stucco. If I would have eliminated the bigger chunks it probably wouldn't be all that bad. It's not really practical at any rate, though, since wood absorbs water.
Try sand?
Thought about it, but there was no source of decent, dry sand around the garage. Had plenty of sawdust, though!
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Old 07-15-2014, 11:36 PM   #43
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Re: Insulating paint beads: Feedback from REAL people please

Results?
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Old 07-16-2014, 08:57 AM   #44
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Re: Insulating paint beads: Feedback from REAL people please

The weather hasn't been working with me. The results will come when the sun is shining..
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Old 07-16-2014, 01:26 PM   #45
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Re: Insulating paint beads: Feedback from REAL people please

love the info on this site.....we the people by the people for the people !!! thanks for your test
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Old 07-16-2014, 03:50 PM   #46
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Re: Insulating paint beads: Feedback from REAL people please

It's no scorcher of a day, but the sun is shining brightly! That's all we need. I measured temperatures twice. Once at 2:10pm EST and again at 3:12pm EST.
I'll post the results textually at the bottom of the post for those who don't care to try to read the fuzzy thermometer display. Also, you can click on the image to go to Flickr, where you can view the image in it's original size.
Here's the data for the first batch:


Thermometer test.


Off-white paint: 41.2C
21.4C above ambient temperature


Black paint: 57.8C
38C above ambient temperature


4 coats of Solarflex roof paint: 33.7C
13.9C above ambient temperature


2 coats of Solarflex roof paint: 37.5C
17.7C above ambient temperature


2 coats of Solarflex roof paint + Hytech beads: 35.2C
15.4C above ambient temperature


2 coats of Solarflex roof paint + sawdust: 32.9C
13.1C above ambient temperature

I'll reiterate.
- Off-white paint: 41.2C
- Black paint: 57.8C
- 4 coats of Solarflex roof paint: 33.7C
- 2 coats of Solarflex roof paint: 37.5C
- 2 coats of Solarflex roof paint + Hytech beads: 35.2C
- 2 coats of Solarflex roof paint + sawdust: 32.9C
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Old 07-16-2014, 04:06 PM   #47
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Re: Insulating paint beads: Feedback from REAL people please

And now for the second batch @ 3:12pm EST


Temperature is the same, but the sun is in a different position.


Off-white paint: 40.9C
21C above ambient temperature


Black paint: 53.3C
33.4C above ambient temperature


4 coats Solarflex roof paint: 33.4C
13.5C above ambient temperature


2 coats Solarflex roof paint: 37.2C
17.3C above ambient temperature


2 coats Solarflex roof paint + Hytech beads: 34.2C
14.3C above ambient temperature


2 coats Solarflex roof paint + sawdust: 32.4C
12.5C above ambient temperature

To reiterate:
- Off-white paint: 40.9C
- Black paint: 53.3C
- 4 coats Solarflex roof paint: 33.4C
- 2 coats Solarflex roof paint: 37.2C
- 2 coats Solarflex roof paint + Hytech beads: 34.2C
- 2 coats Solarflex roof paint + sawdust: 32.4C

And the winner of both rounds! ...
...
...
SAWDUST AND ROOF PAINT!!!

I'm not all that surprised. It looks like it's all about being thick, white and reflective. Obviously, adding crap to the paint makes it a thicker product, whether it be Hytech NASA beads, sawdust, pixie dust, gravel, shredded tires, etc... A thicker product is more insulation. Now, for my uses, I'm just going to make a thick insulator of more paint layers. It looks nicer and - in the end - is cheaper. The Hytech Bus Kote is $197.50 + shipping for a 5 US gallon pail. Most white, elastomeric roof coatings I've seen (including Henry's Solarflex) hover around $80. I bought the Solarflex for $74 at Ace Hardware. To use twice as much paint on the roof is only $148. I'm going that route.
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Old 07-16-2014, 04:53 PM   #48
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Re: Insulating paint beads: Feedback from REAL people please

Jazty,we'll have to get you admitted to the "Myth Busters Hall Of Fame"! I expect that the rougher surface of the saw dust laden paint added to it's ability to shed heat due to it's greater exposed surface area--I guess that idea could be tested easily enough by using the same test panel in and out of the breeze. Thanks for going to all the bother. It was fun to see the results. Jack
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Old 07-16-2014, 05:01 PM   #49
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Re: Insulating paint beads: Feedback from REAL people please

Quote:
Originally Posted by ol trunt
I expect that the rougher surface of the saw dust laden paint added to it's ability to shed heat due to it's greater exposed surface area
That could very well be the case! I would guess that whatever the cause may be, the Hytech beads and sawdust share that characteristic. They both add more texture, thus more surface area, and they both thicken the paint.
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Old 07-16-2014, 05:43 PM   #50
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Re: Insulating paint beads: Feedback from REAL people please

I'm surprised. I thought the much hyped beads would have been much more insulating. Now I'm glad that I just went cheap and stuck with the SolarFlex.
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