The Roofing Book

Materials / Modified Bitumen

Modified Bitumen

asphaltic

Asphalt-based low-slope membrane reinforced and modified with polymers (SBS or APP), installed in rolls by torch, hot mop, cold adhesive, or self-adhered.

Category family
asphaltic
Typical lifespan
15–25 years
Typical wind resistance
FM-rated assemblies vary by attachment
Typical fire rating
Class A
Weight per square
100–150 lbs
Cost band
$$
Slope suitability
low
Typical warranty
10–20 years
Pros
  • multi-ply redundancy
  • good puncture and tear resistance
  • several installation methods
  • proven asphaltic chemistry
Cons
  • torch-applied methods carry fire risk
  • more labor-intensive than single-ply
  • seams require care

Manufacturers

CertainTeed Johns Manville SOPREMA GAF IKO Malarkey Roofing Products Mule-Hide Products Polyglass USA

Named products

CertainTeed Flintlastic FR-PCertainTeed CertainTeed Flintlastic SACertainTeed DynaLastic 250 FR CR GJohns Manville ELASTOPHENE FlamSOPREMA GAF LIBERTY SBS Self-Adhering Roofing SystemGAF GAF RUBEROID 20 Smooth MembraneGAF GAF RUBEROID HW Granule MembraneGAF GAF RUBEROID HW Smooth MembraneGAF GAF RUBEROID MOP Smooth MembraneGAF GlasKap PlusJohns Manville IKO ArmourCool Granular TP-HD-CapIKO IKO ArmourStick HD-CapIKO IKO Modiflex MP-250-CapIKO IKO PrevENt MP-HD-CapIKO IKO PrevENt TP-HD-CapIKO IKO Torchflex TP-250-CapIKO IKO Torchflex TP-HD-CapIKO Malarkey 430 OmniSeal CapMalarkey Roofing Products Malarkey 601 Paragon MOD CapMalarkey Roofing Products Mule-Hide SA-SBS Cap SheetMule-Hide Products Polyglass Elastoflex SA VPolyglass USA SOPRALENE 250 FR+ GRSOPREMA SOPRALENE Flam 180SOPREMA

Related guides

Commercial Flat-Roof Options Asphalt vs. Metal vs. Tile Wind & Fire Ratings New Roof Cost

Sources