Every hot tub cover Spa Guy builds is upgraded to 2 pound high density inserts. 2 Pound density inserts are stronger, have a higher R Value, and absorb less water than covers built out of 1 or 1.5 pound density foam.
Foam density refers to the weight per cubic foot of the insulation material. Our expanded polystyrene foam cores are made out of 100% virgin beads and heat sealed in a 4 mill plastic vapor barrier. Since the beads that make up the foam core are packed closer together their is less space for water to be be absorberd. The high quality materials we start with guarantee the cover you order from us will last.