Originally Posted by garandman
This is again - this is the second van I've done and a buddy did his as well. It makes a huge difference.
I want to an outfit that makes sound deadening material for the marine industry. It's really expensive (about $12 per running foot, 54" wide) but they had "reel ends" - 5' to 10' sections that I was able to buy for less. This stuff is 2" thick self-adhesive flame-retardant foam with Mylar covering.
Many of the other van insulation setups I saw didn't dampen sound, absorbed moisture, weren't flame-retardant or all of the above.
On the wheel wells I put some of their multi-layer damping material. You can buy stuff like that at auto sound shops also - lining the wheel wells makes a huge difference. The noise in an unlined cargo van on the highway in the rain is something else.
The vast majority of cargo vans sold are the 250/2500 grade. The 350/3500's are usually either passenger models or for very heavy equipment. The 150/1500's are for - florists? Most of the local dealers don't stock more than one or two of those. They're no bargain.
Interesting to see that you have such a negative opinion on the 1/2 ton vans. I have an '06 Chevy with the 4.3. It runs like new with 120K on it, it gets 17ish in rural driving, and it's stupid cheap to operate. I know plenty of painters, trim carpenters and others who have gotten excellent service from 1/2 ton GM and Ford vans, including several that have ten years and well over 200K of service so far. Better mileage, cheaper parts, doesn't ride like a brick, I'm happy.