Wall insulation recommendation

[MAragorn]

You know, it is best to be careful what you wish for.

After all my years of bitching about architects, the shoe is on the other foot.

I have a client who has a metal building, currently only ventilated. He wants to air condition it, not heat it. He wants to use a spray on insulation.

My inclination is to go for R-20 or better. I have started to do research for this and haven't found one that seems to completely fill the bill:

1. Reasonable cost
2. Helps seal the building against air leaks
3. Moisture resistant, helping to provide a moisture barrier
4. Fire and smoke resistant
5. Pest resistant.


Polyurethane seems to be pretty good, except it has poor smoke spread characteristics and from what I see needs to be enclosed in gypboard or some such.

Anybody have a recommendation for a spray on insulation?

 

[MintJulep]

The ASHRAE Journal, last month, or possibly two month's ago, had a good article on insulation and vapor barrior design. It might offer some insight.

 

[AbbyNormal]

http://www.icynene.com/assets/documents/Icynene Spray Formula.pdf

looks a bit smoky though

I looked at the knauf koolduct system some time ago. I was concerned initially as they were quoting a price with and without a UL sticker.

I actually watched them burn a sample of the foam ducting with a torch, and compared it to code compliant ductboard. Seemed less 'smokey' than duct board in my opinion. Just a casual observation nothing scientific.Was a phenolic foam, maybe look at that type of insulation.

http://koolduct.knaufusa.com/