Progressive Foam Technologies
The Fullback thermal support system is designed to eliminate problems associated with the void behind conventional vinyl siding. Made of expanded polystyrene, it's configured to fit the profile of any vinyl siding panel. Benefits include an R-value of up to 4.0 and resistance to insects, mold and impact, the company says. Fullback is available as ready-to-hang panels and as a contoured underlayment.
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