It took a while to decide on how to sound deaden the van and I finally decided to purchase some Stinger Roadkill Expert mat and some 80 mil Noico foil backed butyl material on Amazon. I visited one of the local auto sound/accessory stores and the Roadkill was $249.00. I like to purchase locally but on Amazon the Roadkill was about $95.00 for 36 square feet and Noico $65.00 for the same amount. I can’t justify paying over 2 and 1/2 times the price just to purchase locally. The Roadkill seems heavier but I haven’t weighed them yet. I’ll put the material on the floor then build a 1 inch framework to add some polyiso insulation and a vapor barrier then reinstall the factory floor panels.