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MONOBOARD® Tapered

ROXUL MONOBOARD® Tapered products are high-density, stone wool insulation boards for low slope roof applications. These tapered boards are available as uncoated or bitumen-coated for tapered roofing packages. Uncoated boards are ideal for mechanically attached membrane systems or when used underneath the thermal insulation layer(s) to provide the drainage for the roof system. The bitumen-coated boards are suitable for torch, hot-mopped and self-adhered membrane or thermal insulation layers. They are used to create drainage on a low-slope roof to prevent the ponding of water which can lead to water issues.

These MONOBOARD® Tapered products are available in a variety of sizes to meet your design needs for tapered roof systems. Contact your local roofing sales representative to help design the tapered package and ensure the correct products will be ordered for your system.

  • Non-combustible, meeting FM 4470 NCC (Non-Combustible Core) rating
  • Provide positive drainage to a low-slope roof system
  • Dimensionally stable providing a long term, consistent thermal performance
  • High impact resistance
  • Excellent acoustic reduction, absorption and impact (rain noise) performance
  • Made from natural & recycled materials, ROXUL can contribute to earning LEED® points
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MONOBOARD® Tapered

Technical Information

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Property Test Standard Performance
Compliance ASTM C726 Standard Specification for Mineral Fiber Roof Insulation Boards
Compliance FM 4470 Approval Standard for Single Ply, Polymer Modified Bitumen Sheet, Built-Up Roof and Liquid Applied Roof Assemblies for use in Class 1 and Noncombustible Roof Deck Construction
Compliance FM 4470 NCC (Non Combustible Core) Rated Roof Insulation
Reaction to Fire CAN/ULC S126-06 Fire Spread under Roof Deck Assemblies - See ULC Directory
Reaction to Fire ASTM E84 (UL 723) Flame spread index = 0 ; Smoke developed index = 0
Reaction to Fire CAN/ULC S102 Flame spread index = 0 ; Smoke developed index = 0
Reaction to Fire CAN/ULC S107-03 Fire Tests of Roof Coverings - Class A
Reaction to Fire UL 790 (ASTM E108) Standard Test Methods for Fire Tests of Roof Coverings - Class A
Reaction to Fire NFPA 276 Standard Method of Fire Tests for Determining Heat Release Rate of Roofing Assemblies with Combustible Above Deck Roofing Components - Class 1
Reaction to Fire UL 263 (ASTM E119) Fire Tests of Building Construction and Materials - See UL Directory
Reaction to Fire CAN/ULC S114 Determination of Non Combustibility of Building Materials - Non Combustible
Density ASTM C303 Actual Density - 12.5 lb/ft³ (200 kg/m³)
Dimensional Stability ASTM D2126 Linear Change 7 days @ 158°F (70°C), 97% RH - 0.1%
Dimensional Stability ASTM D2126 Linear Change 7 days @ 200°F (93°C), ambient RH - 0.1%
Dimensional Stability ASTM D2126 Linear Change 7 days @ 40°F (-40°C), ambient RH - 0.0%
Dimensional Stability ASTM C356 Linear Shrinkage - 1.1% @ 1200°F (650°C)
Hail Performance FM 4470 Test Standard for Susceptibility to Hail Damage - Class 1 - SH (Severe Hail)
Hail Performance FM 4473 Impact Resistance by Impacting with Freezer Ice Balls - Class 4
Hail Performance UL 2218 Impact Resistance of Prepared Roof Covering Materials - Class 4
Thermal Resistance ASTM C518 (C177)
Mean Temperature R-Value RSI Value
75°F (24°C) 4.0 hr.ft2.F/Btu 0.70 m2K/W
25°F (-4°C) 4.4 hr.ft2.F/Btu 0.77 m2K/W
40°F (4°C) 4.3 hr.ft2.F/Btu 0.75 m2K/W
110°F (43°C) 3.7 hr.ft2.F/Btu 0.66 m2K/W
Reaction to Moisture Moisture Sorption - 0.29% ASTM C1104
Reaction to Moisture ASTM C209 Water Absorption - <1.0%>
Reaction to Moisture ASTM E96 Water Vapor Transmission, Desiccant Method - 2360 ng/Pa.s.m2 (41 perm)
Compressive Strength ASTC C165 11psi (75kPa) @ 10% compression
Compressive Strength ASTC C165 28psf (190kPa) @ 25% compression
Corrosion Resistance ASTM C795 Cracking Tendency of Austenitic Stainless Corrosion Resistance Steel - Passed
Corrosion Resistance ASTM C665 Corrosion of Steel - Passed
Thickness Nominal - 1" (25.4mm) Actual - 1.04" (26.4mm)
Dimensions 48"x48" (1219mm x 1219mm)
Acoustical Performance ASTM C423
Thickness 125 Hz 250 Hz 500 Hz 1000 Hz 2000Hz 4000 Hz NRC
1" 0.13 0.49 0.85 0.89 0.89 0.97 0.8
Acoustical Performance ASTM C423 1" 0.13 0.49 0.85 0.89 0.89 0.97 0.8
Acoustical Performance ASTM E90 Contact ROXUL for STC rated assemblies
FM APPROVED
ULC LISTED
CLASSIFIED UL
MIAMI-DADE COUNTY APPROVED
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