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Built-up Roofing Systems

Johns Manville Roofing

Four Ply Fiber Glass Cold Application Built-Up Roof Gravel or Mineral Surfaced for use over wood or other nailable decks on inclines of up to 3 in. per foot

ebuild Ref. No. 4GNG-CA
Retail Price Information
List Price Notice

Where prices are shown, they are based on the best information available to ebuild and generally refer to manufacturer's suggested retail prices. They should be used for reference only. In some instances, the list price refers to the lowest-cost version of an item that may be available in a variety of colors, finishes, sizes -- or upgraded features. Check with local distributors for actual prices.

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Product Specifications

Manufacturer Model No. 4GNG-CA
Number of Plies 4
Application Method Cold-adhesive application
Membrane Type Fiberglass
Required Substrate/Deck Type Nailable
Type of Intermediate Felts Fiber glass
Required Surfacing Gravel
Composition JM Base Sheet, 3 plies JM Base Sheets, JM BUR Cold Apllication Adhesive, JM Surfacing
Recommended Roof Slope per Foot
  • 1/4 in.
  • 3 in.
Approximate Installed Weight per 100 sq ft
  • 204 lb
  • 639 lb
Additional Parts Required/Recommended
  • Sheathing Paper 1 layer: (Wood board decks only) per 100 sq ft of roof area
  • Felts (Base): 1 layer (Ventsulation, GB #605 or GB #607) per 100 sq ft of roof area
  • Felts (Base): 3 layers (GlasBase Plus, GB #605, GB #607 or GlasTite Flexible) per 100 sq ft of roof area
  • Interply (Up to 3 in.): 4 - 6 gal. (JM BUR Adhesive) per 100 sq ft of roof area
  • Surfacing (Gravel): 400 lb per 100 sq. ft per 100 sq ft of roof area
  • Surfacing (Slag): 300 lb per 100 sq ft of roof area
  • Surfacing: 4 - 5 gal. (JM BUR Adhesive) per 100 sq ft of roof area
  • Surfacing (Granules): 60 - 100 lb per 100 sq ft of roof area

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