Another Spray foam question

[BTI]

I already have bubble wrap vapor barrier on the roof of my pole barn.
It is sandwiched between the steel and the trusses.
Can I have this spray foamed with no problem???
Has anyone here had this done??
If it makes any diff the trusses are on 8ft centers with the 2x4's stood on edge and run on 24" centers.

BTI

 

[Az Scooter]

Foam will stick to anything. What would probably happen is the foam contractor would spray the foam on think enough to cover the trusses. Around here, they spray it on the roof, instead of on the ceiling. Then they put a coating on it to make it weatherproof.

 

[BTI]

When I built it a few years ago I never even considered spray foam....
My foresight was off a touch LOL

BTI

 

[Oldtymeflyr]

We had to have a ceiling insulated with spray foam due the design of the ceiling, there was not enough space to get the required R rating with any other type of insulation.

I would presume that the bubble wrap will be a problem due to the weight of the foam causing the bubble wrap to tear.

Spray foam sticks to about everything(mask what do do not want it to stick too), It costs several times more than any other form of insulation. It does work.

Good Luck!

Rick

 

[BTI]

I have a quote of $3700 for 3" of closed cell foam sprayed on the peak, gables and 1' band around the top of the structure.

BTI

 

[muddhunter]

You wont have a problem. They should seal right over purlins. That stuff is rigid as all get out, and as long as the span between is not too great you will have no problems. If it is too much span you may have some sagging but still no problems.

 

[Weedwaka]

Foam away !! We have 4" in our carriage house roof and LOVE it. Its always warm... even in -20c . Adds an *** pile of structural rigidity to that roof too. It will be like a giant cooler lid

 

[BTI]

Ok so I got 2 quotes 1 for 3in of closed cell for 3700.
I have a second for 1.5" of closed for 5000.
The same guy gave a quote for 5" of open cell for $2800.
One thing that makes me wonder.....the second guy said you can't really do 3" of closed easily because it needs to cool for awhile.
Is this true?

BTI

 

[kbkna]

Not an expert, But I do know the open cell will ansorb water. I would recommend closed cell for this reason and if you want to paint it white, although it will still absorb paint, it won't take as much. Not sure if you want to put it over the bubble wrap. Might put it on the top of the roof and seal it. The quote for my 50x100x16 closed cell with 2 inches on interior ceiling and 1 inch on walls is 14,200. I am in Alabama.

 

[Weedwaka]

Open cell foam allows vapor to pass and condensation to form. I would rather have 2 full inches of closed cell. Thats really all you need. You will be amazed what it can do.

There is a guy on here that does this professionally. You should search him out and ask his opinion. He helped us quite a bit.

 

[BTI]

I was pretty sure I wanted closed, but he priced the open anyway.
The same guy that gave the $3700 quote for 3" closed said he could do 2" of closed for $2800

BTI

 

[HeyNow^]

I got a quote from a guy for my walls in my 30X40X12 pole building. I asked for closed cell foam and he starting talking about closed cell is over rated and he would recommend open cell. I have been doing a lot of research and had pretty much decided I wanted closed cell for moisture and ridgidity benefits. He quoted me $3700 for 4 inches of the open cell for my walls. Over the phone without looking at my space. When talking with this guy I just felt a bit uncomfortable with his attitude. So I'm still looking....

 

[BTI]

Even the second guy said open cell is not good always good for the walls on a PB.
Mainly because they always tend to seep a little thru the overlaps etc.
I figure it depends alot on how it was built.

Heynow^ Where you at in WV?

BTI

 

[Randy in Maine]

As far as I am aware, the closed cell foam is usually applied about 2" thick to provide for a vapor and infiltration barrier to the exterior side of the interior. Other insulation (foam of fiberglass) can be applied on the interior side of that closed cell foam. It really does stick to about everything.

It is usually pretty dense at about 2-3 pounds per cubic foot vs 0.5-0.75 pounds per cubic foot of open cell foam.

My case was sort of the exception to the rule (2" x 6" roof rafters for my vaulted living room ceiling) and they applied it to fully fill the 2"x 6" cavities with the closed cell foam. It costs more and uses more material, but it was the only way to maximize the R-value of the ceiling using the existing roof rafters. I could not use 2" think sheets of foam board on the interior side in this case or I would have.

If I had 2" x 12" rafters up there, I would have done it differently. I am pleased with the result though. Very tight with greatly reduced infiltration and now I cannot even hear it raining.

 

[HeyNow^]

Martinsburg- Eastern Panhandle

 

[creativecars]

I got a quote yesterday from a local guy, when I asked about open cell. He said the open cell is ½ the price and ½ as effective, so he will only do closed cell. His price without seeing the building is $1.00 per sq. ft. at 1” thick. That is about what it cost for a DIY kit for 605 sq. ft.-$600.00. I was hoping it was going to be cheaper knowing he buys it in 55 gal. drums.

 

[BTI]

I was hoping it was going to be cheaper knowing he buys it in 55 gal. drums.

But he has the labor, the right equipment to do it with and he needs to make a little.

DIY vs Me doing it.....all costs being equal I'd definitely let someone else do it.

This is also what I have found mostly just bouncing around sites and such.
DIY vs having someone do it are right in line with each other if you are getting a good deal on someone spraying it.


BTI

 

[Weedwaka]

I looked into DIY and it was more expensive plus a huge PITA. Thats with buying in large *** tanks of the stuff. Its fussy too. When you have the part a/b tanks and have to get the pressures just right and the temps. A nice heated spray rig showing up and doing the job for less is as cadillac as it gets.

Funny story. When I was calling around for prices on dow 60 gallon tanks of a/b foam and accessories for my job, one company got confused between stores ( one getting the quote and one that handles the foam supply). Instead of quoting me shipping on (4) units, they actually shipped them to me from somewhere in mid america. Delivery guy said shipping costs from the border alone were 800.00. Probably 1500 - 2000 freight costs. I wonder if someone got fired over that one.

 

[DustynF]

I just got a quote from Superior Insulation here in Southern IN for 1.80 a sq ft at 2inches thick. Closed Cell of course.. I am thinking it would be worth it to go that route because after paying shipping and everything else it would be cheaper to have someone come in and spray it.

 

[creativecars]

1.80 for 2" sounds pretty good. I don't mind the DIY work and I have several irons in the fire (who doesn't). I have 1 attached wall to the house that I would like to spray, old basement rock foundation and rim joist, roof in shop and hand made carriage doors. I can do it a little at a time if I do it. Otherwise I have to have everything cleaned out and ready at one time for someone else to do it.

 

[DustynF]

1.80 for 2" sounds pretty good. I don't mind the DIY work and I have several irons in the fire (who doesn't). I have 1 attached wall to the house that I would like to spray, old basement rock foundation and rim joist, roof in shop and hand made carriage doors. I can do it a little at a time if I do it. Otherwise I have to have everything cleaned out and ready at one time for someone else to do it.

I have the same exact problem. I would like to do a wall at a time so I can shuffle my junk from one side to the other.

 

[BTI]

Another quote to add...
$2400 for garanteed 1 inch but will probably be a little more.

BTI