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ROXUL PLUS® MB

ROXUL PLUS® MB is a is a lightweight, non-combustible, semi-rigid mineral wool blanket insulation, designed for pre-engineered metal building construction where an hourly fire rating is not required. Insulating buildings with ROXUL PLUS MB will help increase energy efficiency, improve thermal stability, and enhance fire protection for the overall comfort and safety of occupants.

  • Lightweight, fire resistant, and sound absorbent
  • Strong – well suited for site durability
  • Easy to install, easy to cut
  • Water and moisture resistant – maintains R-value even when wet
  • Does not rot or promote mildew, fungi, or bacteria
  • Sag resistant for tight fits; high density never loses shape
  • Consistent thermal performances with high R-values
  • ROXUL can contribute to earning LEED® points
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ROXUL PLUS® MB

Technical Information

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Property Test Standard Performance
Compliance ASTM C553 Mineral Fiber Blanket Thermal Insulation, Type I, II and III
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 S114 Determination of Non Combustibility of Building Materials - Non Combustible
Reaction to Fire ASTM E136 Behaviour of materials at 750°C - Non Combustible
Density ASTM C303 Actual Density - 2 lbs/ft³ (32 kgs/m³)
Thermal Resistance ASTM C518 (C177) R-Value / inch @ 75oF 4.0 hr.ft2.F/Btu
Thermal Resistance ASTM C518 (C177) RSI value / 25.4mm @ 24oC 0.70 m2K/W
Corrosion Resistance ASTM C795 Stress Corrosion Cracking Tendency of Austenitic Stainless Steel - Passed
Corrosion Resistance ASTM C665 Corrosion of Steel - Passed
Reaction to Moisture ASTM C1104 Moisture Sorption - 0.03%
Reaction to Moisture ASTM C1338 Determination of Fungi Resistance - Passed
Thickness 2” through 4” (50.8mm - 101.6mm) in 1/2" increments as well as 5" (127mm) and 6" (152.4mm)
Dimensions 24" x 48" (610mm x 1219mm)
Acoustical Performance ASTM C423
Thickness 125 Hz 250 Hz 500 Hz 1000 Hz 2000Hz 4000 Hz NRC
2.5" 0.34 0.76 1.12 1.05 1.04 1.04 1
3.5" 0.56 0.99 1.17 1.04 1.05 1.05 1.05
6" 1.17 1.2 1.16 1.08 1.08 1.07 1.15
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