My insulation theory, take a look.

myredracer wrote:
Talk to a company or individual that has done Class B van conversions or search the internet. For example, here's a guy who did a conversion and used spray foam insulation and sounds like he did a bunch of research first. Build a green RV

Thanks for the info, I have already red his article, but the big difference is the van model, he has a ProMaster, and he has access to all the outer panels from the inside, just like my ceiling and higher walls, but this thread is about insulating the lower walls which have an inner panel that would block the spray from getting to the outer panel, so the only solution I came up with (if you absolutely want to use polyurethane foam) is to pour it through the openings, but nobody seems to have tried it...

Like I mentioned earlier I hired a professional company to shoot the ceiling and higher walls and they wouldn't touch the lower walls for that reason :-(

I also thought of buying that kit and doing it myself but the commercial company I hired use much higher density foam and I needed that to stiffen the whole van up, If you noticed the way they added that High top on my van is very different vs the standard 24" or 30" high fiberglass tub on a roof opening. The van was kind of wobbly when I first drove it, but after having the foam done the difference was amazing and it also blocked the sound very good, that's a big part of the reason I went with polyurethane foam.

I haven't driven it in a while now, I've added a lot of interior panels, walls and roof rack, I think that will also help to stiffen the whole thing up.