Product Data Sheet Safety Data Sheet Show all documents
Base Sheet NB 48

Base Sheet NB 48

Base Sheet NB 48 is a SBS modified fiberglass base sheet

Base Sheet NB 48 is a 48 mil (1.2 mm) thick SBS modified fiberglass base sheet for use within Sarnafil® hybrid roofing systems.

  • Fiberglass reinforced for strength and dimensional stability
  • Sanded surface accepts hot asphalt for Sika’s ply sheet attachment
Product Data Sheet Safety Data Sheet Show all documents

Usage

Base sheet within Sarnafil® hybrid roofing systems
  Areas of Application
  • Over light weight insulating concrete (LWIC) on metal deck
  • Over cementitious wood fiber decks
 

Advantages

  • Fiberglass reinforced for strength and dimensional stability
  • Sanded surface accepts hot asphalt for Sika’s ply sheet attachment

Packaging

36" (0.9 m) x 108 ft (33 m) roll, 92 lbs (41.7 kg) per roll, 20 rolls per pallet

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • Underwriters Laboratories
  • Florida Building Code
  • Meets ASTM D4601, Type II
  • Tested according to ASTM E108
  • Tested according to ANSI/FM 4474 for wind uplift
  • Tested according to Miami-Dade TAS 114 for wind uplift
 
Product Information

Chemical Base

SBS modified fiberglass base sheet with sanded topside and sanded underside

Shelf Life

N/A

Storage Conditions

N/A

Thickness

48 mil (1.2 mm)

Mass per Unit Area

28.4 lb/100 ft2 (1391 g/m2)

Felt Weight

1.7 lb/100 ft2 (83 g/m2)  mass of desaturated glass mat

Solid Content

10 lb/100 ft2 ( 488 g/m2) Asphalt, minimum
Technical Information

Tensile Strength

Load strain properties at 77°F (25°C)

 60 & 44 lbf (267 & 196 N) MD & CMD1

(ASTM D-4601)

1MD = Machine Direction, CMD = Cross Machine Direction

Application

Application steps

SUBSTRATE PREPARATION

Surface must be clean, smooth, sound, dry, and free of loose materials, debris or contaminants.  Light weight insulated concrete shall conform to the manufacturer’s and building code requirements for suitability of the deck and for the climatic zone location of the installation.

APPLICATION

Unroll Base Sheet NB 48 and allow it to relax.  Mechanically fasten Base Sheet NB 48 to the deck with approved fasteners and plates at a rate according to Sika's recommendations for fastening rates and patterns.

Apply uniform tension to Base Sheet NB 48 and begin fastening at the center of the sheet.  Work toward the end laps pushing out all wrinkles and buckles.

Install fasteners in accordance with fastener manufacturer's recommendations.

Overlap side laps 3" (76 mm) and end laps 6" (152 mm).

Coverage

324 ft2 (30.1 m2) per roll

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