jacobconroy
Hillbilly of Leisure
Jacob ,you may find if you want to follow the contours of the van walls . To use multiple layers of thin board . Were as a inch and a half board R 7.5 it won't bend much ,three half inch are easy to bend . PL 300 glue is made for foam and won't eat it like some glues . Also what I like to do is cut the board a half inch short all the way around ,and then spray foam around it . gives it a perfect seal and locks it in place. The build I am working on right now ,after the board is done I wrap the hole inside with Reflectic and tape all joints .The floors in your van are in great shape given the year of it .
I'm not opposed to layering sheet insulation. Wouldn't it take three times as long and be three times the cost though? 1/2 inch certainly sounds like it will be easier to work with.
If I go with PolyIso or XPS, I had planned to "glue" the outer layer to the metal with "Great Stuff" spray foam. If multiple layers are used (and they probably will need to be due to the curvy body), then PL 300 will be good for the subsequent layers. Any thoughts on if this is a good or bad idea? Also, will it be OK to glue the panels on between 40º - 50ºF? I haven't had much luck Googling info about Great Stuff & application temperature.
Also, am I to understand that XPS is preferable to PolyIso in the cold? In Montana I have no need to insulate specifically for hot weather. There isn't much hot weather here. And if it's nice outside, I won't be in the van.