Hi Mex,
It would be a lot of work--but the advantage is I could diy. I'm still concerned about it being fire proof.
The undercoating I suppose I could have done by a shop.
MEXICOWANDERER wrote:
I used rigid one inch foam panel and it was a pain to install. Spray foam as an adhesive. After the rigid foam had stuck good I sprayed over top with a non asphalt base undercoating from spray cans. As I sprayed, I cut sheets of extra heavy duty Reynold's Wrap aluminum foil and stuck it to the tacky undercoating. Dull side exposed. Later on, I found out the foam panels could be purchased with one side aluminized. Your underneath may look like a patchwork quilt after cutting jigsaw shaped pieces of foam board to fit, but after it is sprayed down with undercoating, it'll look much better. One stinking inch of closed cell foam board made all the difference in the world. I used a drywall saw when cutting out pieces. I slid them into place over top other accessories and doo dads.