
Foam-Control Plus+ carries a warranty for 100 percent of R-value for a full 20 years, compared with XPS, which warrants 90 percent of its R-value. Regardless of thickness, density or application, the warranty for Foam-Control Plus+ is the same. ACH Foam provides Foam-Control Plus+ in 2- by 8-foot and 4- by 8-foot sheets in standardized units.