|
|
01-26-2017, 12:31 PM
|
#1
|
Bus Nut
Join Date: Jan 2015
Location: Brazoria County, Texas
Posts: 819
Year: 1997
Coachwork: Carpenter
Chassis: International
Engine: T444E
Rated Cap: 32 Passenger
|
Heat Reflective Roof Paint
Has anyone nailed down a roof paint that seems to be the best ?
|
|
|
01-26-2017, 12:33 PM
|
#2
|
Bus Geek
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 23,764
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
|
Plain old flat white paint is the most reflective.
|
|
|
01-26-2017, 12:37 PM
|
#3
|
Bus Nut
Join Date: Jan 2015
Location: Brazoria County, Texas
Posts: 819
Year: 1997
Coachwork: Carpenter
Chassis: International
Engine: T444E
Rated Cap: 32 Passenger
|
Quote:
Originally Posted by EastCoastCB
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?
|
|
|
01-26-2017, 12:59 PM
|
#4
|
Bus Geek
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 23,764
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
|
|
|
|
01-26-2017, 01:59 PM
|
#5
|
Skoolie
Join Date: Jul 2015
Posts: 100
|
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... ;)
|
|
|
01-26-2017, 02:08 PM
|
#6
|
Bus Crazy
Join Date: Jun 2016
Location: Orange County, CA
Posts: 1,358
Year: 1990
Coachwork: Crown, integral. (With 2kW of tiltable solar)
Chassis: Crown Supercoach II (rear engine)
Engine: Detroit 6V92TAC, DDEC 2, Jake brake, Allison HT740
Rated Cap: 37,400 lbs GVWR
|
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.
John
|
|
|
01-26-2017, 02:42 PM
|
#7
|
Bus Geek
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 23,764
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
|
Quote:
Originally Posted by mrblah
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/
|
|
|
01-26-2017, 02:48 PM
|
#8
|
Bus Nut
Join Date: Jul 2016
Location: Central Florida
Posts: 938
Chassis: GMC or Chevrolet, I hope
Engine: gasser probably
|
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.
Sent from my BLU LIFE ONE X using Tapatalk
__________________
the more i learn, the less I know what to buy . . .
|
|
|
01-26-2017, 02:50 PM
|
#9
|
Bus Geek
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 23,764
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
|
Right. White elastomeric roof paint. Kool Seal is one brand but there are a ton of different brands. All pretty much the same.
|
|
|
01-26-2017, 04:38 PM
|
#10
|
Mini-Skoolie
Join Date: Jan 2017
Location: FL
Posts: 34
|
Nice!
Quote:
Originally Posted by EastCoastCB
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
|
|
|
01-26-2017, 05:10 PM
|
#11
|
Traveling
Join Date: Nov 2015
Location: Midwest
Posts: 2,573
Year: 2003
Coachwork: BlueBird
Chassis: TC2000
Engine: 5.9L Cummins
Rated Cap: '00
|
Quote:
Originally Posted by Iceni John
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.
John
|
Interesting. fillite?
It's be east to do a study on a couple small identical metal boxes and a pair of thermometers.
FILLITE Hollow Ceramic Microspheres - The Cary Company
Microspheres, ceramic, fillite | eBay
|
|
|
01-26-2017, 08:17 PM
|
#12
|
Bus Nut
Join Date: Mar 2015
Location: hills of sw virginia
Posts: 889
Year: 1996
Chassis: thomas
Engine: 8.3 cummins
Rated Cap: 11 window
|
only thing I don't like about the cool seal is it collects dirt. im going with the gloss oil base white.
|
|
|
01-26-2017, 08:25 PM
|
#13
|
Bus Geek
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 23,764
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
|
I'll be using satin white rustoleum on the roof.
|
|
|
01-26-2017, 09:19 PM
|
#14
|
Bus Geek
Join Date: Mar 2011
Location: Houston, Texas
Posts: 8,462
Year: 1946
Coachwork: Chevrolet/Wayne
Chassis: 1- 1/2 ton
Engine: Cummins 4BT
Rated Cap: 15
|
Not to start another fire storm of controversy, but...my personal experience with the HyTech beads left me quite impressed. Applied to the inside of a rusty 1920's, industrial corrugated tin roof it felt almost cool on a 100+ degree Houston day in August. Nothing but two coats of the "pixie dust" mixed with Home Depot latex "mistakes". Also..they make a clear finish coating that purportedly makes it much easier to keep clean out in this dirty world, but that I cannot comment on.
I'm using it all over my shorty.
|
|
|
01-26-2017, 10:42 PM
|
#15
|
Bus Nut
Join Date: Jul 2016
Location: Central Florida
Posts: 938
Chassis: GMC or Chevrolet, I hope
Engine: gasser probably
|
Check the links in this one. The experiment rocks.
http://www.skoolie.net/forums/showthread.php?t=15029
Sent from my BLU LIFE ONE X using Tapatalk
__________________
the more i learn, the less I know what to buy . . .
|
|
|
01-26-2017, 11:07 PM
|
#16
|
Bus Nut
Join Date: Jan 2015
Location: Brazoria County, Texas
Posts: 819
Year: 1997
Coachwork: Carpenter
Chassis: International
Engine: T444E
Rated Cap: 32 Passenger
|
Thanks guys. You gave me plenty of info to look at and decide.Mango is across town from me, so I totally understand the hot August days in Houston.
|
|
|
01-27-2017, 12:11 AM
|
#17
|
Skoolie
Join Date: Jul 2015
Posts: 100
|
Quote:
Originally Posted by EastCoastCB
|
I know it's not. But it still more complex than a simple reflective value given by the manufacturer. Yes southern region use white paint, but that doesn't tell us anything about the component in the paint.
All I'm saying is that the material of the dry paint (chemical composition) is as important as the color (which obviously should be white...).
Taking the value of the LRV at face value can be misleading since it doesn't measure heat, but luminance. Roofing compounds that offer up a r-value is more interesting since this means they tested the heat tranfert of the entire medium.
|
|
|
01-27-2017, 05:57 AM
|
#18
|
Bus Geek
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 23,764
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
|
|
|
|
01-27-2017, 06:22 AM
|
#19
|
Bus Nut
Join Date: Mar 2015
Location: hills of sw virginia
Posts: 889
Year: 1996
Chassis: thomas
Engine: 8.3 cummins
Rated Cap: 11 window
|
Quote:
Originally Posted by Tango
Not to start another fire storm of controversy, but...my personal experience with the HyTech beads left me quite impressed. Applied to the inside of a rusty 1920's, industrial corrugated tin roof it felt almost cool on a 100+ degree Houston day in August. Nothing but two coats of the "pixie dust" mixed with Home Depot latex "mistakes". Also..they make a clear finish coating that purportedly makes it much easier to keep clean out in this dirty world, but that I cannot comment on.
I'm using it all over my shorty.
|
on the underside of the roof? not on the outside?
|
|
|
01-27-2017, 07:11 AM
|
#20
|
Mini-Skoolie
Join Date: Jan 2017
Location: FL
Posts: 34
|
Nice!
Quote:
Originally Posted by Tango
Not to start another fire storm of controversy, but...my personal experience with the HyTech beads left me quite impressed. Applied to the inside of a rusty 1920's, industrial corrugated tin roof it felt almost cool on a 100+ degree Houston day in August. Nothing but two coats of the "pixie dust" mixed with Home Depot latex "mistakes". Also..they make a clear finish coating that purportedly makes it much easier to keep clean out in this dirty world, but that I cannot comment on.
I'm using it all over my shorty.
|
Thanks
|
|
|
|
|
Thread Tools |
|
Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Threads |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|