Built-Up Roofing (BUR) - GAFGLAS Ply 4



GAFGLAS® Ply 4 Ply Sheet roofing felt is constructed with a strong glass fiber mat that is coated with the finest quality asphalt, and is designed with optimum porosity to assure a sound, watertight membrane.


GAFGLAS® Ply 4 Ply Sheet is used as a ply felt in the construction of built-up roofs. It is designed for use in all climate zones and is appropriate for use as a base sheet, as a ply felt, and in the construction of flashing membranes.


  • High tensile strength and a high degree of dimensional stability, resulting in a roof system with greater resistance to splitting and cracking

  • Optimum porosity of the felt provides ready escape of air while allowing proper asphalt penetration at the time of mopping

  • Asphalt coating provides high degree of moisture resistance

  • Fire resistant — for use in UL Class A rated assemblies

  • Wind uplift resistance — selected roofing assemblies with GAFGLAS® Ply 4 felts meet FMRC Class 1-180 when installed over concrete decks

  • Meets ASTM D-2178, Type IV specifications

  • Can be used in all climate zones

  • Rolls out flat for easy installation

  • Typical system guarantees available for up to 15 years, select system constructions available with up to 20 year guarantee coverage.

Applicable Standards
Meets ASTM D2178, Type IV
FM Approved
ICC ESR # 1274
Miami-Dade County Product Control Approval
UL/ULc Listed

Product Specifications (Nominal)
Roll Size 5 squares (531 gross sq. ft.) (49.3 m2)
Roll Length 161.8' (49.3 m)
Roll Width 39.375' (1.0 m)
Approx. Roll Weight 34.9 lbs (20.0 kg)


All documents are U.S. English unless otherwise noted

Commercial Roofing EagleView Commercial Property Owners Portal Architects And Specifiers Green Roof Central


Product Princing and Where to Buy