Insulation

Flashing: Sheet metal or other material used to seal around penetrations to resist moisture intrusion.

Skirting: Weather-resistant framing and sheeting used to enclose the crawl space of a manufactured home.

Vapor retarder: A material having a permeance rating of 1.0 or less when tested in accordance with ASTM E 96.

Super thin, super high R value insulation could be used for flooring – yellowbluetech.com

Composite foam

 

Teresa Baker