Insulation board washers.
Insulation board washers, which prevent the screws penetrating into the extruded polystyrene (XPS) foam.
Fixing discs are galvanized or stainless steel.
N13/375 Shower units
N13/40 Shower units
wedi Tools Insulation Board Washers, Galvanized 35 mm Diameter
wedi Tools Insulation Board Washers, Stainless Steel 35 mm Diameter