TU35 Layfast SBS Modified Reinf. 30# Underlayment, 33 Rolls - MB Tech. TU35 30# Layfast SBS-Modified-Asphalt Fiberglass-Mat Reinforced Underlayment/Base Sheet. Use under tile/shingle roofs. Lays flat. Mechanically Fastened. 3.3x64.75 ft Rolls (2-Sq). 33 Rolls/Pallet. Price/Pallet. (see detail view notes)
TU35 Layfast SBS Modified Reinf. 30# Underlayment, 33 Rolls
$2,030.00 SALE $1,302.95
(Savings: $727.05)
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PRODUCT: MB Technology TU35 30# Layfast SBS Modified Asphalt Fiberglass Mat Reinforced Underlayment / Base Sheet. Mechanically Fastened. 3.31' x 64.75' rolls (2 Square). 33 Rolls/Pallet. Price/Pallet. (shipping leadtime 2-4 days)

DESCRIPTION: Ideal for use under tile, shingle roofs. Lays flat during application. Higher tensile, tear and weight compared to 30 and 40# felt. The open mesh construction of the asphalt coated fabric allows the surface coatings to penetrate through and interlock, thereby providing a firm mechanical bond between coatings, and insuring long life of the application. This strong elastic interlocking system is very pliable and prevents rupture due to expansion and contraction of the applied surfaces.

APPLICATIONS: SBS modified underlayment for use under tile, shingle roofs. Lays flat during application. Higher tensile, tear and weight compared to 30 and 40# felt.

FEATURES: SBS modified asphalt underlayment/base. Reinforced with fiberglass mat.
  • Much higher tensile strength than standard asphalt cotton.
  • 20 x 10 thread count provides larger mesh openings, improving bitumen saturation and penetration.
  • Suitable for Hot or Cold applications.
  • High Tensile strength yet very lightweight.
  • Will not rot, mold or mildew. 
  • Meets ASTM D1668, Type I & Fed. Spec. HH-C-466b
  • Dimensionally stable and free of defects.
  • Will unroll and handle easily in normal installation.
  • The asphalt saturated fabric unrolls easily, without distortion.
  • The treated fabric can be applied smoothly and without wrinkles.   
  • Higher tear resistance
  • Increased longevity
  • More protection
  • More water resistant
Weight: 78 lbs./roll
Width/Length: 39-3/4" / 64' 4"
Reinforcement: Fiberglass
Application: Mechanically fastened
Coverage: 2 squares/roll
Rolls Per Pallet: 33
Hot Asphalt Application Information
Heat Welded Applications

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similar product terms: SBS modified asphalt underlayment, shingle roofs, layfast underlayment, layfast SBS, mb technology, roof underlayment, steep roofing, valleys, eaves, tile roofs, metal roofs, high pitched roofs

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MB TU70 Layfast SBS Modified Asphalt Reinf. 70# Underlayment, 36 Rolls
MB Technology TU70, 70# Layfast SBS Modified Asphalt Underlayment w/ Fiberglass Mat. Use under Tile/Metal Roofs where two layers of 30# is specified. Mechanically fastened. 3.3x32.5 ft/Roll. 36 Rolls/Pallet. Price/Pallet. (ship leadtime 2-4 business days)
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