Q&A Forums
6.7 lb foam Post New Topic | Post Reply
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Posted: Oct 17, 2011 11:44 PM
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6.7 lb foam
Can someone tell me how many bd ft a 6.7 lb kit will cover?
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steven argus
Posted: Oct 18, 2011 10:28 PM
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where's dl123 when ya need him?? Just kidding BM... get yer question straight and we'll see if we can't help ya out. |
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Posted: Dec 04, 2011 10:51 PM
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You can't put a 6.7lb heavy density polyurethane in a kit. The chemistry won't support it. |
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angus mcdougald
Posted: Dec 05, 2011 02:54 PM
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I think they mean a set..... I don't use foam that dense, but I think you can figure out coverage based on math.... If its a 1000lb kit and you get a cubic foot every 6.7 lbs, you get about 149 cubic ft, or about 1800 bdft.... I think it works that way.... |
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Circle-D
Posted: Dec 07, 2011 08:43 PM
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Just sitting here contemplating that thought, I don't think it works quite that way. If it did a 1000 lb set of 2lb would yield us all 6000 bd.ft. I never get that, anyone else? The blowing agent has to weigh something and that is lost in the reaction. The mist and fumes in the air also come from the foam and must weigh something.I'm guessing there is a 15-20% loss of weight to volume here, foamdude, you must have a secret formula fer figuring this out? |
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John Shockney
Posted: Dec 08, 2011 09:41 PM
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The blowing agent is a liquidfied gas and some is lost in the spraying. Also 2# foam is only 2 pounds per cuft when hand mixed in a cup test in the lab of the foam manufacturer. Actual density and yield will very due to conditions during the spraying of the foam. Airpro |
