Why, I don't think you are going to gain anything and its going to cost a
ton of money over just using rigid or just more fiberglass.

It may have a higher r value but overall its not going to make much of a
difference.



"JIMMIE" wrote in message
...
I started replacing the siding on a pickup bed camper and when I got
the siding stripped down I found the fiberglass insulation was not in
the best shape. I was thinking of trying one of the DIY kits of
polyurethane spray in insulation instead of putting back more
fiberglass batting. Ive read the brochures but I wondered if anyone
has had any first hand experience using it. It looks to me like you
just keep spraying in thin layers , let them expand and set then do it
again to you get the thickness you want. I was looking for the
gotchas. My plan is to set the tanks up on a work table with casters
and have the wife push it around the camper following me. Hopefully
once we start we can just keep going until its done. Since the
framing is 2 X2 I figure two passes should be enough.

Jimmie