Built-Up Roofing (BUR) - GAFGLAS FlexPly 6

GAFGLAS® FlexPly™ 6 Ply Sheet


GAFGLAS® FlexPly™ 6 Ply Sheet premium-performing fiberglass Type VI roofing felt. Its revolutionary flexible design provides:

  • Maximum strength and stability

  • Improved conformance to underlying substrates

  • Ease of installation compared to typical Type VI felts

  • Long-term performance for peace of mind


GAFGLAS® FlexPIy™ 6 Ply Sheet felt should be specified as a ply felt in the construction of all premium quality built-up roofs, including:

  • System guarantees are available for up to 20 years

  • Most GAF Composite Roof systems

  • Also appropriate for use as a base sheet and in the construction of flashing membranes


  • Revolutionary flexible design...
    Rolls out easier and lays flatter, minimizing the danger of air pockets and trapped moisture during installation

  • Saves labor...
    Open pore design actively absorbs asphalt, installs faster than other Type VI felts

  • Quality installation...
    Enhanced porosity encourages proper absorption of asphalt for long lasting system performance up to 20 years

  • Proprietary Micro Weave Core...
    Provides superior tensile strength and dimensional stability, for greater resistance to splitting and cracking

  • Superior wind resistance...
    Selected systems have FMRC Class 1-180 rating

  • Highest fire rating...
    For use in UL, ULC Class A rated assemblies

  • Can be used in all climate zones

Applicable Standards
Meets ASTM D2178, Type VI
FM Approved
ICC ESR # 1274
Miami-Dade County Product Control Approval
State of Florida Product Approval
Texas Department of Insurance
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 44 lbs (20.0 kg)


All documents are U.S. English unless otherwise noted

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