Replies

1. 
   Frank_Therrien | Sep 18, 2000 02:33am | #1

   *
   As I understand it, Icynene is a open-cell foam whereas the polyurethane foams are closed-cell. Open-cell foams "breathe" a little bit (just the right amount, according to their manufacturers) but offer an average R-value per inch (about 3.6). I've seen many spray-in polyurethane foams that yield an R-value of about 7. Ostensibly, you can spray half as much and lower your costs (though not by half). Corbond is a name I've seen for polyurethane foams. They sign on contractors (which all of the foam manufacturers require, from what I've seen). I wouldn't worry about R-value so much with this type of product, because R-value in a lab and R-value in the field can be considerably different. Good luck.

1. 
   rick_romano | Oct 18, 2000 06:49pm | #2

   *frank, I'm trying to decide about which insulation to use:polyurethane vs icynene. I'm doing a major remodel on my 1970's cape home which is in a very wind exposed location on a mountaintop in Mass.. Which is the better to use? I'm planning to spray against the roof sheathing from the inside as well as the interior walls and crawlspace walls. what do you think? Thanks! rick

1. 
   Harry_Ludke | Oct 18, 2000 09:03pm | #3

   *I recently had my cellar ceiling sprayed with the Icynene foam. I had installed under floor radiant heating which was than covered with 1/2 inch foil faced insulating board. This was done to create a air channel and reflect the heat back up toward the floor.First observation, the foam is sprayed at about 1500psi. This created LOTS of splatter. Make sure the area is well covered or will be covered by some other material. This stuff is extremely sticky. Once it's on something it,El be there till it wears off.Second. In a confined space, coverage can be very inconsistent. The contractor is wearing a helmet for fresh air. He has a very difficult time seeing up close. Especially when the gun is shooting out at 1500psi. You need to inspect the work as they spray to make sure the provide adequate coverage.Would I do it again? It depends on the products performance this winter. The jury is still out.

1. 
   Crusty_ | Oct 19, 2000 05:12am | #4

   *Something to find out is whether or not the two types "off-gas." Icynene touts their's as not giving off any gases, and being essentially inert.

1. 
   Harry_Ludke | Oct 19, 2000 05:15pm | #5

   *With the Icynene foam there was a strong odor for about 5 days. This odor rapidly disappeared. Now after 1 month, there is no discernible residual odor.

2. 
   Sue_V. | Oct 25, 2000 03:32am | #6

   *I think the flexability of Icynene makes it a desirable choice. The ability to "move" with the building without cracking seems perfect for new construction.

2. 
   Loyd_Sims | Oct 25, 2000 03:32am | #7

   *
   Which is better, Icynene or spray poly.? Can you just buy them and the equipment and spray them in yourself or is a training program required? I would like to insulate an older home a section at a time. No one in my town sprays this type of insulation. Hot in West Texas.