Products / Base Sheet NB 120

Base Sheet NB 120 is a 120 mil (3.1 mm) SBS modified, fiberglass-reinforced venting base sheet for Sarnafil hybrid roofing systems. It has a sanded topside that accepts hot asphalt for attaching Sika's ply sheet and a granular underside embossed with a venting pattern, and is mechanically fastened over lightweight insulating concrete on metal deck or over cementitious wood fiber decks. Rolls are 39.4 in by 32.8 ft (about 107 ft2), and the data sheet lists ASTM D4897 Type II, Underwriters Laboratories and the Florida Building Code.