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Johns Manville
Commerical Industrial Roofing Systems\Roof Insulations
Roof Insulations - Page 7
Commerical Industrial Roofing Systems\Roof Insulations
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Roof Insulations |
| Fiber Glass™ Roof Insulation |
JM Fiber Glass Roof Insulation is composed of inorganic glass fibers
which are bound by a resinous binder and manufactured in rigid board form. The boards are top surfaced with asphalt, a fiber glass scrim reinforcement and kraft paper to provide a tough, impact-resistant surface to support the roof membrane. ApplicationFiber Glass Roof Insulation is used as a mid-thermal insulation on metal,
nailable and non-nailable roof decks. It is also particularly suited for use in reroof conditions where an existing roof, or a portion of an existing roof, is left in place. It can be applied using hot asphalt or mechanical fasteners and is compatible with many built-up and modified bitumen roofing systems. It is not recommended for use with single ply systems without an approved cover board. SizesFiber Glass Roof Insulation is available in 4' x 4' (1.22 m x 1.22 m) and
4' x 8' (1.22 m x 2.44 m) boards. Thicknesses range from ¾" (19 mm) to 3" (76 mm). AdvantagesStrength and Durability. When applied over rigid decks, Fiber Glass Roof
Insulation resists damage from on-the-job and maintenance traffic. It offers an excellent substrate for many built-up and modified bitumen membranes, and effectively bridges flute openings in metal decks.Dimensional Stability. Because of its inorganic fiber glass composition,
Fiber Glass Roof Insulation is dimensionally stable over a wide range of weather conditions.Fire Resistance. Fiber Glass Roof Insulation has excellent fire resistance
and is approved for use in numerous FM and UL approved constructions.Mopping Surface. Fiber Glass Roof Insulation provides an excellent base
to receive a built-up or SBS modified bitumen membrane. It has excellent compatibility with hot asphalt.Stable R-Value. Fiber Glass Roof Insulation has a stable R-value because
it is composed of inorganic fiber glass materials. Tapered Fiber Glass Roof InsulationTapered Fiber Glass Roof Insulation is available on request. Contact your
JM Sales Representative for details. Thermal Values| Thickness (nom.) | C-Value (Conductance) | R-Value (Resistance) | Nominal Weight | ||||
| in | mm | BTU/(hr - ft2 - °F) | W/m2 - °C | (hr - ft2 - °F)/BTU | m2 - °C/W | lb/ft2 | kg/m2 |
| 3/4 15/16 1 1/16 1 5/8 2 2 1/4 3 |
19 24 27 41 51 57 76 |
0.36 0.27 0.24 0.15 0.125 0.11 0.08 |
2.04 1.53 1.36 0.85 0.71 0.62 0.45 |
2.78 3.70 4.17 6.67 8.00 9.09 12.50 |
0.49 0.65 0.74 1.18 1.41 1.61 2.22 |
0.78 0.94 0.91 1.32 1.59 1.71 2.26 |
3.81 4.60 4.44 6.44 7.76 8.34 11.03 |
Fiber Glass Roof Insulation complies with the requirements of
ASTM C 726 (except for compressive strengths on products with 1" [25 mm] or greater thickness). Factory MutualFiber Glass Roof Insulation has been rated in Factory Mutual fire and
wind-resistant systems for BUR and modified bitumen constructions. This testing is specific to the roof deck, insulation, fastener, fastener pattern and the membrane. For current information on JM FM approved systems, contact a JM Technical Service Specialist, JM Sales Representative or consult the current FM Approval Guide. Underwriters LaboratoriesFiber Glass Roof Insulation is classified by Underwriters Laboratories, Inc.
and is approved insulation for numerous Class A roof constructions. Contact a JM Technical Service Specialist for details regarding specific approvals.Fiber Glass Roof Insulation is also listed by Underwriters Laboratories,
Inc. for use in Construction Numbers 1, 2, 14, 120, 123, 156, and 374. See the current UL Roofing Materials and Systems Directory.