Fanfold foam residing board is a thin perforated, extruded polystyrene foam board faced on one side with a plastic film facer and combines proven xps foam technology with a unique design to enhance the application of new or replacement siding. Webnorandex 1/4” insulation is an extruded polystyrene (xps) foam insulation board fanfolded for easy installation over existing exterior surfaces. It is used as a rigid foam. Some versions can also serve as a vapor barrier, which is vitally important where moisture is prevalent. Foam board insulation provides quality thermal resistance and support.
