ROCKWOOL Toprock® Tapered, Flute Filler and Cant Strips

Fabricated stone wool insulation products are engineered for compatibility with a variety of membranes and membrane types, air/vapor barriers, fasteners, and various adhesives, making them critical components for a durable roof assembly in new construction and re-roofing applications.

Incorporating fabricated stone wool components in addition to ROCKWOOL Toprock® DD, Toprock® DD Plus and ROCKWOOL Multifix™ board products as part of your full low slope roof can improve the overall performance of your building.

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Product Specifications

Compliance ASTM C726 - FM 4470 - Roofnav
ASTM C726 Standard Specification for Mineral Fiber Roof Insulation Boards
FM 4470 NCC - Non-Combustible Core Rated Roof Insulation
FM 4470 Class 1 approval for steel roof deck construction (refer to FM RoofNav for tested assemblies)
FM 4470 Approval Standard for Single-Ply, Polymer-Modified Bitumen Sheet, Built-Up Roof (BUR) and Liquid Applied Roof Assemblies for use in Class 1 and Non-Combustible Roof Deck Construction
Density 12.5 lb/ft³ (200 kg/m³)
ASTM C303 12.5 lb/ft³ (200 kg/m³)
Dimensions Tapered Panel Dimensions
Tapered Tapered Plus Panel ID Slope
in. (mm)
Panel Thickness Range
in. (mm)
Avg. Thickness
in. (mm)
Panel Dimension
in. (mm)
196465   AA 1/8 (3.175) 0.5 - 1.0 (12.7 - 25.4) 0.75 (19.05) 48 x 48 (1219 x 1219)
196466 196479 A 1/8 (3.175) 1.0 - 1.5 (25.4 - 38.1) 1.25 (31.75) 48 x 48 (1219 x 1219)
196467 196480 B 1/8 (3.175) 1.5 - 2.0 (38.1 - 50.8) 1.75 (44.45) 48 x 48 (1219 x 1219)
262482   C 1/8 (3.175) 2.0 - 2.5 (50.8 - 63.5) 2.25 (57.15) 48 x 48 (1219 x 1219)
196473 196486 X 1/4 (6.35) 0.5 - 1.5 (12.7 - 38.1) 1 (25.4) 48 x 48 (1219 x 1219)
196474 196487 Y 1/4 (6.35) 1.5 - 2.5 (38.1 - 63.5) 2 (50.8) 48 x 48 (1219 x 1219)
196464 196488 Q 1/2 (12.7) 0.5 - 2.5 (12.7 - 63.5) 1.5 (38.1) 48 x 48 (1219 x 1219)
196475 196489 R 1/2 (12.7)

   0.0 - 2.0    (0 - 50.8)

1 (25.4) 48 x 48 (1219 x 1219)
Format Length and Width Dimensions
Tapered and Tapered Plus 48" x 48" (1219 mm x 1219 mm)
Flute Filler 48" (1219 mm) Length
CANT Strip 48" (1219 mm) Length
Reaction to fire ASTM E84, CAN/ULC S102 - Flame Spread Index, Smoke Developed Index CAN/ULC S114 - Noncombustibility
ASTM E84 (UL 723) Flame spread index = 0 ; Smoke developed index = 0
CAN/ULC S102 Flame spread index = 0 ; Smoke developed index = 0
CAN/ULC S114 Determination of Non-Combustibility of Building Materials - Non-Combustible
Temperature resistance R-Value / inch @ 75°F 3.8 hr.ft2 .F/Btu

 

Mean Temperature R-Value / inch RSI Value / inch ASTM C518 (C177)
75°F (24°C) 3.8 hr.ft2.F/Btu 0.68 m2K/W
25°F (-4°C) 4.3 hr.ft2.F/Btu 0.74 m2K/W
40°F (4°C) 4.2 hr.ft2.F/Btu 0.72 m2K/W
110°F (43°C) 3.6 hr.ft2.F/Btu 0.64 m2K/W
Reaction to moisture Vapor Permeable, Water Absorption - <5.0%vol
ASTM C209 Water Absorption - <5.0%
ASTM E96 Water Vapor Transmission, Desiccant Method - 2360 ng/Pa.s.m2 (41 perm)
Compressive strength ASTM C165
ASTM C165

12.3 psi (85 kPa) @ 10%, 27.6 psi (190 kPa) @ 25%

Corrosion Resistance Corrosion of Steel - Passed
ASTM C665 Corrosion of Steel - Passed
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ASTM C726 Standard Specification for Mineral Fiber Roof Insulation Boards
FM 4470 NCC - Non-Combustible Core Rated Roof Insulation
FM 4470 Class 1 approval for steel roof deck construction (refer to FM RoofNav for tested assemblies)
FM 4470 Approval Standard for Single-Ply, Polymer-Modified Bitumen Sheet, Built-Up Roof (BUR) and Liquid Applied Roof Assemblies for use in Class 1 and Non-Combustible Roof Deck Construction
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ASTM C303 12.5 lb/ft³ (200 kg/m³)
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Tapered Tapered Plus Panel ID Slope
in. (mm)
Panel Thickness Range
in. (mm)
Avg. Thickness
in. (mm)
Panel Dimension
in. (mm)
196465   AA 1/8 (3.175) 0.5 - 1.0 (12.7 - 25.4) 0.75 (19.05) 48 x 48 (1219 x 1219)
196466 196479 A 1/8 (3.175) 1.0 - 1.5 (25.4 - 38.1) 1.25 (31.75) 48 x 48 (1219 x 1219)
196467 196480 B 1/8 (3.175) 1.5 - 2.0 (38.1 - 50.8) 1.75 (44.45) 48 x 48 (1219 x 1219)
262482   C 1/8 (3.175) 2.0 - 2.5 (50.8 - 63.5) 2.25 (57.15) 48 x 48 (1219 x 1219)
196473 196486 X 1/4 (6.35) 0.5 - 1.5 (12.7 - 38.1) 1 (25.4) 48 x 48 (1219 x 1219)
196474 196487 Y 1/4 (6.35) 1.5 - 2.5 (38.1 - 63.5) 2 (50.8) 48 x 48 (1219 x 1219)
196464 196488 Q 1/2 (12.7) 0.5 - 2.5 (12.7 - 63.5) 1.5 (38.1) 48 x 48 (1219 x 1219)
196475 196489 R 1/2 (12.7)

   0.0 - 2.0    (0 - 50.8)

1 (25.4) 48 x 48 (1219 x 1219)
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Tapered and Tapered Plus 48" x 48" (1219 mm x 1219 mm)
Flute Filler 48" (1219 mm) Length
CANT Strip 48" (1219 mm) Length
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ASTM E84 (UL 723) Flame spread index = 0 ; Smoke developed index = 0
CAN/ULC S102 Flame spread index = 0 ; Smoke developed index = 0
CAN/ULC S114 Determination of Non-Combustibility of Building Materials - Non-Combustible
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Mean Temperature R-Value / inch RSI Value / inch ASTM C518 (C177)
75°F (24°C) 3.8 hr.ft2.F/Btu 0.68 m2K/W
25°F (-4°C) 4.3 hr.ft2.F/Btu 0.74 m2K/W
40°F (4°C) 4.2 hr.ft2.F/Btu 0.72 m2K/W
110°F (43°C) 3.6 hr.ft2.F/Btu 0.64 m2K/W
Back
ASTM C209 Water Absorption - <5.0%
ASTM E96 Water Vapor Transmission, Desiccant Method - 2360 ng/Pa.s.m2 (41 perm)
Back
ASTM C165

12.3 psi (85 kPa) @ 10%, 27.6 psi (190 kPa) @ 25%

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ASTM C665 Corrosion of Steel - Passed
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