12 psi

Fanfold DWB Damproofing Waterproofing Board is an extruded polystyrene foam layer sandwiched between two tough, non-perforated, impact resistant plastic facers.

Fanfold DWB is used to protect and cushion the basement wall membrane during backfilling. The product can be used in both residential and commercial below grade applications.

Owens Corning’s FOAMULAR® extruded polystyrene insulation is an ENERGY STAR® qualified product.

Foamular Fanfold DWB