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Arthur Gillis Posted: Feb 12, 2007 06:22 AM	0.5 & 2 lb SPF yields I am told by manufacturers that you can expect around 16000 bdft per set of 1/2 lb foam and around 4000 bdft for 2 lb foam. This has to be theoretical yield with a controled environment, i.e. perfect temp. ambient, substrate and chemical, humidity, etc. What is the typical actual yields you are getting for both the 1/2 lb and 2 lb foam. Is it unrealistic to figure on 25% less for actual yield v.s. theoretical. Also what do you use for figuring waste when you price a job. I am thinking around 25% for 1/2 lb and around 10% for 2 lb.
Gerry Wagoner Posted: Feb 12, 2007 04:22 PM	4000 ft² sounds accurate for 2-pound. 16,000 ft² for open cell sounds good, but it may be a bit optimistic. We get 13500 more commonly. Keep the trigger pulled, olger

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Comments

Arthur Gillis

Posted: Feb 12, 2007 06:22 AM

0.5 & 2 lb SPF yields

I am told by manufacturers that you can expect around 16000 bdft per set of 1/2 lb foam and around 4000 bdft for 2 lb foam. This has to be theoretical yield with a controled environment, i.e. perfect temp. ambient, substrate and chemical, humidity, etc.

What is the typical actual yields you are getting for both the 1/2 lb and 2 lb foam. Is it unrealistic to figure on 25% less for actual yield v.s. theoretical. Also what do you use for figuring waste when you price a job. I am thinking around 25% for 1/2 lb and around 10% for 2 lb.

Gerry Wagoner

Posted: Feb 12, 2007 04:22 PM

4000 ft² sounds accurate for 2-pound.

16,000 ft² for open cell sounds good, but it may be a bit optimistic. We get 13500 more commonly.

Keep the trigger pulled,

olger

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