Foam Insulation

[Marcel R. Cyr]

Larry, what we have done in the past on that thought for fire rating is install 2" of Corbond SPF in the walls which is an r-factor of 13 and then add a 3-1/2" r-13 on top for a total of 26.

It does two things;
Keeps the cost of the SPF down
Adds the needed r-factor requirement
And acts as a fire retardant to protect the SPF

Corbon Spray insulation does not sustain a flame but the gas would be poisonous.
The batt insulation meets the Flame Spread of <25 and Smoke Developed of < 450.

[Larry D. Kage]

Originally Posted by mcyr

Larry, what we have done in the past on that thought for fire rating is install 2" of Corbond SPF in the walls which is an r-factor of 13 and then add a 3-1/2" r-13 on top for a total of 26.

It does two things;
Keeps the cost of the SPF down
Adds the needed r-factor requirement
And acts as a fire retardant to protect the SPF

Corbon Spray insulation does not sustain a flame but the gas would be poisonous.
The batt insulation meets the Flame Spread of <25 and Smoke Developed of < 450.

That sounds good, Marcel.

I have no doubt your planning, in the construction realm, is stellar. Good job!

[Marcel R. Cyr]

Thanks Larry, but it all boils down to the fact that there are a lot of Pros and Cons about any product that you may use.

The key is to agree on one that is consensus of everyone involved.