Poll: elastomeric vs. white paint on roof

[USMCRockinRV]

They use Ceramic on Bike Exhaust to not burn you... I could only imagine how suspending ceramic in paint also provides a superior heat barrier~

 

[jazty]

They use Ceramic on Bike Exhaust to not burn you... I could only imagine how suspending ceramic in paint also provides a superior heat barrier~

If you had 95% ceramic in the paint like those exhaust coatings then, yes, it could plausibly make an improvement. Note that they don't use ceramic beads, though. From my understanding, they are typically made from ceramic dust + binding agents, etc.. Lizardskin makes a ceramic coating that goes on thick. Thickness is probably the biggest player in this insulated paint debate. Of course, real insulation always wins out.

I have no experience with that type of coating, though. I've only tested HyTech's product and it was lackluster. If you've read the thread I posted earlier you will see that the results were disappointing.

 

[milkmania]

all this debate on painting the roof... and it's only going to serve one purpose

personally, I'd lean toward putting up an almuminuminumnumum framed deck floating 2 inches above the highest part of the roof, insulate it with layers of 1/2" plywood*, 1" double foiled insulated foam board, refletix, with a 3/4" layer of plywood on top, with aluminum cross bracing, weld stake pockets on the main aluminum frame, with stakes for a removable canopy with sun shade fabric... or make a screened porch for catching the breezes, when the weather is nice.

and turn that deck into dual purpose, like the upper deck of houseboats, with airflow under the deck.

Start the aluminum frame just behind the driver's cabin, and put solar panels above the driver's cabin, on tilting frames you can tilt them from the upper deck. Lay flat during transport, and tilt when you're on location.

a short 3' - 4' rear deck mounted to back of bus for a staircase /or\ ladder on one side, and opposite side of deck for the lower part of a mini-split A/C unit with dual zones for the back half and front half of bus.

paint it all you want, but you're not going to be walking around on top of it much!

*you could even use expanded steel for the underside of deck, if you prepare it for electrolysis because of differing metals.


edit:
as soon as I posted this comment... the images that refresh at the top of the page showed this?

 

[Stu & Filo. T]

Since we're on the subject of elastomeric paint has anyone applied it right over metal that was treated with ospho with out primer afterwards?

 

[USMCRockinRV]

That's cool... I think the best practice and I saw this when I drove onto the Branch Davidian Property (true story)... Is to bury the Bus 5' underground - it blocks out most of the sun... [emoji15]

 

[EastCoastCB]

Was that before or after the weenie roast??

 

[Timelord-SKO]

Since we're on the subject of elastomeric paint has anyone applied it right over metal that was treated with ospho with out primer afterwards?

If I recall correctly, Ospho specifically warns it is not primer.

 

[Stu & Filo. T]

If I recall correctly, Ospho specifically warns it is not primer.

It just says treat, let dry overnight then paint, no mention of priming.

 

[Timelord-SKO]

I just went out to the shop to read the bottle. What I was recalling was that it warns it is not a *paint*. So... I have no idea on if primer is required or not. I put on a primer coat when I did my floor.

 

[onenationundergoat]

That deck would be nice, but with a lil' 360 engine we're already gonna have enough weight to pull up a hill. Plus paint is cheaper. Plus I've heard roof decks make it waaaay harder to insure.

 

[Stu & Filo. T]

I just went out to the shop to read the bottle. What I was recalling was that it warns it is not a *paint*. So... I have no idea on if primer is required or not. I put on a primer coat when I did my floor.

But it also says paint will adhere far better

 

[nat_ster]

personally, I'd lean toward putting up an almuminuminumnumum framed deck floating 2 inches above the highest part of the roof, insulate it with layers of 1/2" plywood*, 1" double foiled insulated foam board, refletix, with a 3/4" layer of plywood on top, with aluminum cross bracing, weld stake pockets on the main aluminum frame, with stakes for a removable canopy with sun shade fabric... or make a screened porch for catching the breezes, when the weather is nice.

No thanks, way too much plywood.

White painted aluminum expanded metal would make a far better deck serface, than a bunch of water logged plywood that high up.

I feel the insulation is not necessary in the roof deck. The only purpose is to block sunlight, and allow air to travel between the bus and the deck for natural cooling.

Aluminum is the best metal to disperse the heat absorbed from the direct sunlight.

Insulation should be inside the metal bus shell for maximum performance.

Other than that I like the idea's you mentioned.

Nat

 

[milkmania]

No thanks, way too much plywood.

White painted aluminum expanded metal would make a far better deck serface, than a bunch of water logged plywood that high up.

I feel the insulation is not necessary in the roof deck. The only purpose is to block sunlight, and allow air to travel between the bus and the deck for natural cooling.

Aluminum is the best metal to disperse the heat absorbed from the direct sunlight.

Insulation should be inside the metal bus shell for maximum performance.

Other than that I like the idea's you mentioned.

Nat

quite true regarding the plywood, after I typed it all out... I found that red bus with "deck boards" that would be a better option, and I wouldn't think anything less that insulating inside the bus, and using a deck over that. I'll agree that aluminum makes great heat sink material, but expanded aluminum with allow light to pass through.

I saw a deck display a while back at my local Home Depot that had a very thick textured material covering it.... I believe it was a Rustoleum 4x Restore deck product, and I learned they have it in white

edit: disregard the bold part... I'm reading about a class action lawsuit now

 

[USMCRockinRV]

Was that before or after the weenie roast??

Hahahaha After...Weird place

And you could still see the holes in the slab that went into the underground buses.

Over in Europe I saw the boats that had Sod Roofs - LOL
Not sure that would work for the Rockin RV~

 

[EastCoastCB]

My aunt lived near Waco back in those days. I think I was 14. I'd imagine it is a bit weird. But I'm the guy who wants to travel to Guyana.

 

[USMCRockinRV]

Hahahahaha.... I think wanting to travel is a healthy thing - wanting to let 'everyone' know the world is ending while blaming 'everyone' in the world... Not so much!!!! LOL

 

[Stu & Filo. T]

But it also says paint will adhere far better

Just called the company & their tech services said no primer necessary as long it hasn't been exposed to moister

 

[milkmania]

someone is utilizing the wasted space the way I'm talking about....
the metal roof is in the shade 24/7, 365

 

[onenationundergoat]

I ended up going to an auto paint store. They set me up with two gallons for the body (pale green), one gallon for the roof (white), with hardener, for $177. I'll be spraying it on. It's acrylic enamel with add-in hardener, so it should last pretty decently and look somewhat glossy.

 

[Tango-SKO]

Good call...the hardener makes a HUGE difference in durability.
Makes for nice shiny too.