Insulation Suggestions?

Got some new conversion van side windows last weekend and started the fun process of pulling out the panels the last owner made. I just wanted to see what’s behind them to avoid cutting something I shouldn’t. I’m actually pretty impressed with the old panels. Ugly as sin grey vinyl but done with only 3 pieces from floor, across ceiling, and down to other side floor. The plywood will be a great template for our wood paneling.

Anyways, behind the ply is standard pink housing fiberglass insulation. ...should I keep that or do you guys (and gals) prefer another material?


Some people bash it, when I bought my van it was 18 years old, had 190k on it, and had pink insulation in the doors and walls since new (conversion van). The insulation was a little flattened and dirty, but zero evidence of moisture or mold. I put it back and don't worry about it.
Need to did into the photo's at home and find some, have had 6 vans , 1965 Chev, 1976 Chev, 1986 Chev, ? Dodge, 1998 Ford, and 2005 GMC
Did some wild things with the old ones, chopped the roof off of the "76"chev and molded a Old's Vista station wagon roof with glass, we used a lot of carpet back then, "O" the time spent inside a van !!!!
thinsulate or primaloft. lookup Hein on the sprinter forum.
Thanks for the mention. (our contact info is at One issue we've seen with fiberglass is if it's not well contained then you'll be breathing it. Small fibers tend to shake loose from vibration and air currents (opening/closing doors) can blow/suck them out of the wall cavity and into the living space. @OP Look in the bottom of the wall cavities. That's were the loose fibers will collect. If they build up then can block drain holes. One of the main benefits of Thinsulate is that it elminates the need for other noise control products. It's will eliminate panel resonance and also absorb ambient noise. Please contact us for a sample. We also carry Low-E (known also as EZ-cool)

All the best,