Spray in foam?

T

Thudpucker

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"Touch n' Foam" is sorta what I'm asking about.

There are places where that might be handy. So buying part "A" and part "B" in 5 Gallon Buckets or etc might be handy to know about.

All kinds of stuff is "two part" and sprayed in for a permanent insulation and bug proofing.
I've seen it sprayed on 'TOP' the roof of buildings. If you don't paint it Silver or some anti-sunshine, it goes away about 1/4" per year.

What about spraying it under the roof? Would that work?
It'd make a good headliner for some boats, and also the liner under the Bow, over the bunks.

Where would I go to look up some info on this stuff?
 
in my limited experience it is impossible to get it smooth without some sort of machining.
B
 
From what I've seen, a professional can better control the amount of 'rise' but otherwise, like brucie said, it'll expand at it's own rate.
 
I'm pretty sure it's open-cell foam , so if the skin is breached you would want to be very careful to keep it from getting water logged & heavy (i.e. , from poorly sealed or loosened fasteners down into the overhead ?....) . Also the stuff tends to sputter when spraying and once cured the unwanted foam can be nearly impossible to remove completely. The canned stuff would never apply anything close to flat or smooth unless it was contained by something that would be permanant. "No solvent will remove dried(cured) foam." Even then it might buckle the containment during expansion. By directive we used it to insulate through holes drilled into the stress-skin walls of post & beam houses we built and there were some control issues. I don't recall the ratios, but that stuff really expands with a lot of force.

"No solvent will remove dried(cured) foam."
 
I've had some experience with the Open Cell stuff. We made the first "Bow Hunter" real target shoot with that stuff and the Forms from Jonas Brothers. "Lions n' Tigers n' Bears....Oh no!"

It was back in the 60's though. I was hoping the newer stuff would be better.
We had to throw away almost everything that stuff got onto.
We used a couple sets of 55 Gal Bbl's of the stuff to make 40, life sized Animals, including a HUGE Polar Bear and an Elephant. We had to slice 30" out of the middle of those animals so the shooters could get their arrows back out of the Target.
Anyway....back to the Future here n' now.

I was thinking of spraying the underside of the Barn roof for Water proofing and Heat Deflection.

What about Closed Cell? Or maybe something else all together?
 
Not sure if this helps but they do make a spray in foam that is designed to not expand as much as others and supposedly guarantees that it will not buckle the containment area. I picked up a couple of cans when I framed in new windows in my house to spray between the stud and sill extension and it worked well, expanded some and definitely did not exert pressure on the sill. It still, however, makes a nearly impossible to clean up mess if you drip any on hardwood floors.

It's sold right next to the other expanding foams in Home Depot.

--Rick
 
Just remembered some commercial about spray-on foam roof insulation on the outside. I thought it was a bunch of bunk then cuz their display roof was very evenly flat and from experience, I know it don't work like that.

...come to think of it, haven't seen the commercial 'cept that first one.
 
I have seen that in Alaska. It lays out evenly at Two inches.
If you don't spray over itself, the Roof will be all even over the complete roof.

Then you have to spray some kind of Sun Shield on it.
The Snow fall will set on the Roof all winter.
Lot's of covering get a little water frozen into the coating.
Then, the weight of the Snow Fall, like a Glacier, will slide down the roof, taking your coating with it.
 
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