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ROCKWOOL Comfortboard® 80

Name: Comfortboard 80
Brand: Rockwool

ROCKWOOL Comfortboard® 80 is a rigid stone wool board designed for continuous insulation applications. A non-structural sheathing product, Comfortboard 80 provides increased thermal performance to the building envelope.

Comfortboard 80 is now available in 4” and 5” thicknesses, providing thermal performance up to R21 for building envelopes.

Where to buy

Download datasheet

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ROCKWOOL Comfortboard® 80 Thermal Insulated Sheathing

ROCKWOOL Comfortboard® 80 is a rigid stone wool insulation board designed for use as an exterior continuous insulation in residential and commercial construction.

Comfortboard 80 does not produce smoke or propagate flames, providing a critical line of defense that keeps occupants safe and reduces property damage in the event of a fire.

This stone wool product has been certified by the California State Fire Marshall's Building Materials Listing Program (BML). Vapor permeable, Comfortboard 80 has the added benefit of allowing fast outward drying. The insulation also reduces thermal loss resulting in improved long-term thermal performance.

Properties:

Can be easily cut with a bread knife
Non-combustible with a melting point of approximately 1177°C (2150°F)
Excellent sound absorbency
Vapor permeable
Does not rot or promote the growth of fungi or mildew
Low moisture sorption
Chemically inert; non-corrosive
Water-repellent
CFC- and HCFC-free product and process
Made from natural & recycled materials
ROCKWOOL^® can contribute to earning LEED^® points

Applications

Non-structural thermal insulation
One-coat and three-coat insulated stucco cladding
Basement continuous insulation
Exterior perimeter insulation around foundation
Under flat concrete slab
Residential wood-framed cathedral ceilings

Benefits

	Stone wool provides excellent noise reduction and sound absorption to help you create quieter, more productive environments.		Vapor permeable enabling wall systems to have superior drying potential, minimizing the risk of condensation and water accumulation.
	Fire resistant stone wool can withstand temperatures of approximately 2,150°F (1177°C).		Reduces thermal bridging through wood framing, leading to a higher-performing building envelope.

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Compliance

Mineral Fiber Block and Board Thermal Insulation - Type IVB Compliant

Density

Actual Density - 8 lb/ft³ (128 kg/m³)

Dimensions

1” to 5”: 24" x 48" (610 mm x 1219 mm)

1.5”, 2.5”: 48" x 72" (1219 mm x 1829 mm)

1.25”, 1.5”, 2”, 2.5”, 3”: 48" x 96" (1219 mm x 2438 mm)

Thickness

1“ (25.4 mm)

1.25" (31.8 mm)

1.5" (38.1 mm)

2" (50.8 mm)

2.5“ (63.5 mm)

3" (76.2 mm)

3.5" (88.9 mm)

4“ (101.6 mm)

5“ (127 mm)

Reaction to fire

Flame spread index = 0 ; Smoke developed index = 0

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

Thermal resistance

R-value / inch @ 75ºF - 4.2 hr.ft2.F/Btu

ASTM C518 (C177)

R-value / inch @ 75ºF - 4.2 hr.ft².F/Btu

RSI value / 25.4 mm @ 24ºC - 0.70 m²K/W

Acoustical Performance

ASTM C423: NRC = 0.9

Reaction to moisture

ASTM C1104 - ASTM E96 - ASTM C1338

ASTM C1104	Moisture Sorption - 0.05%
ASTM E96	Water Vapor Transmission, Desiccant Method - 1768 ng/Pa.s.m² (31 perm)
ASTM C1338	Determination of Fungi Resistance - Passed

Compressive strength

ASTM C165

ASTM C165	439 psf (21 kPa) @ 10% compression
	1065 psf (50 kPa) @ 25% compression

Corrosion Resistance

ASTM C795 - ASTM C665

ASTM C795	Stress Corrosion Cracking Tendency of Austenitic Stainless Steel - Passed
ASTM - C665	Corrosion of Steel - Passed

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1” to 5”: 24" x 48" (610 mm x 1219 mm)

1.5”, 2.5”: 48" x 72" (1219 mm x 1829 mm)

1.25”, 1.5”, 2”, 2.5”, 3”: 48" x 96" (1219 mm x 2438 mm)

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1“ (25.4 mm)

1.25" (31.8 mm)

1.5" (38.1 mm)

2" (50.8 mm)

2.5“ (63.5 mm)

3" (76.2 mm)

3.5" (88.9 mm)

4“ (101.6 mm)

5“ (127 mm)

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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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ASTM C518 (C177)

R-value / inch @ 75ºF - 4.2 hr.ft².F/Btu

RSI value / 25.4 mm @ 24ºC - 0.70 m²K/W

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ASTM C1104	Moisture Sorption - 0.05%
ASTM E96	Water Vapor Transmission, Desiccant Method - 1768 ng/Pa.s.m² (31 perm)
ASTM C1338	Determination of Fungi Resistance - Passed

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ASTM C165	439 psf (21 kPa) @ 10% compression
	1065 psf (50 kPa) @ 25% compression

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ASTM C795	Stress Corrosion Cracking Tendency of Austenitic Stainless Steel - Passed
ASTM - C665	Corrosion of Steel - Passed

R-value

Thickness (inch)

Width (inch)

Length (inch)

Item number	R-value	Thickness (inch)	Width (inch)	Length (inch)	Pieces Per Pack	Packs Per Pallet	Pieces / pallet	Square Feet Per Pack	Square Feet Per Pallet

307667	4.2	1	24	48	10	18	180	80	1440
169063	5.25	1.25	24	48	7	22	154	56	1232
168605	5.25	1.25	48	96			32		1024
169065	6.3	1.5	24	48	6	20	120	48	960
168604	6.3	1.5	48	72			28		672
168606	6.3	1.5	48	96			28		896
169067	8.4	2	24	48	5	18	90	40	720
168607	8.4	2	48	96			20		640
290750	10.5	2.5	24	48	4	20	80	32	640
246702	10.5	2.5	48	72			16		384
290807	10.5	2.5	48	96			18		576
169069	12.6	3	24	48	3	22	66	24	528
168608	12.6	3	48	96			15		480
329356	14.7	3.5	24	48	4	14	56	32	448
307670	16.8	4	24	48	2	24	48	16	384
307679	21	5	24	48	2	18	36	16	288