Why do you use Gemini Tweed over other products for your upholstery?
Gemini Tweed is rated as outdoor fabric. It will hold up to UV rays, moisture and temperatures changes, everything your van will go through!
Why do you use 1/8" foam underneath your upholstery?
Using foam under the upholstery fabric leaves a nice padded feel and smooths out any imperfections in the underlying surface. It also adds insulating properties.
What kind of adhesive should I use to glue the foam to the sub surface?
You can use 3M74, 3M90 or any uphosltery foam adhesive.