Closed Cell Spray Foam Insulation And Hiring A Contractor. - Building & Construction - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Building & Construction


Thread Tools Search this Thread
Display Modes
Old 10-12-2009, 07:29 PM   #1
Join Date: Apr 2008
Location: S.E. Wisconsin
Posts: 38
Rewards Points: 25

Closed Cell Spray Foam insulation and hiring a contractor.

Who makes the highest R-Value per inch of closed cell Spray Foam . What is the highest per inch that can be had?

Dow Corning Styrofoam SPF spray foam is R-6.6 per inch. Gaco Western has their spray foam at R-7 per inch.

Anyone know of a spray foam with higher than R-7?

Code in my area is R-38 for vaulted ceiling. If I hired a contractor to spray foam, can he spray my desired inches even if the R-38 code isn't met?

Is he bound by law to only spray code required values or higher?

Spud is offline   Reply With Quote
Sponsored Links
Old 10-13-2009, 09:12 PM   #2
Join Date: Apr 2008
Location: Massachusetts
Posts: 59
Rewards Points: 75

The R value of all closed cell foams as far as I can tell is the same. I wouldn't worry about 10% differences in reported value. Supposedly the R value decreases with time. Perhaps that is the reason for differences.

I would strongly suggest sticking with code to prevent ice dams in your area.
PerpetuallyRepairing is offline   Reply With Quote
Sponsored Links
Old 10-14-2009, 09:03 AM   #3
ccarlisle's Avatar
Join Date: Jul 2008
Location: Montreal, Quebec, Canada
Posts: 1,889
Rewards Points: 1,000

No, foamers aren't like, say plumbers or electricians. I am not sure of your codes where you are but up here some code violations have to be corrected where they impact on safety for example, an electrician has to rewire a plug if that plug is not currently up to code and regardless if the HO asked him to or not (I mean he couldn't just put a plug on bad wiring). But in the case of a foamer, I say that the code is a minimum guideline and not considered violated if not met. The foamer will spray whatever you want so if R38 can't be met in the space provided, he'll do what he can.

Inspectors have enough to do without being a Big Brother. "Live in ND and want R12 in your ceiling, do ya?"
“The average American woman is about 25 pounds heavier than she was in 1960...Recognizing obesity as a disease will help change the way the medical community tackles this complex issue that affects approximately 1 in 3 Americans,”
ccarlisle is offline   Reply With Quote
Sponsored Links

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Top of Page | View New Posts