Alley Wrap™ B

Name: Alley Wrap™ B
Brand: Knauf Insulation

A fiberglass blanket providing both thermal and acoustical insulation, made from highly resilient inorganic glass fibers bonded by a thermosetting binder. It’s available unfaced, or with either and FSK or PSK jacket. Vapor retarders have a 2" (51 mm) stapling flange on one edge, and the factory-applied facing assures uniform quality.

Applications

Certifications

Product Features

Versatile

Alley Wrap B is available as an unfaced blanket, with a with a multi-purpose foil-scrim kraft (FSK) jacket, or with a white metalized polypropylene scrim-kraft (PSK) jacket.

Thermal & Acoustic

Alley Wrap B helps control both temperature and sound, is used as an external insulation on commercial or residential heating or air conditioning ducts.

Sustainable

Alley Wrap B is made with our bio-based ECOSE® binder and is formaldehyde-free. It’s also made with at least 50% recycled glass.

Product Details

Technical Data

TECHNICAL DATA
PROPERTY (UNIT)	TEST	PERFORMANCE
Corrosiveness	ASTM C665	Does not accelerate corrosion of steel
Corrosion	ASTM C1617	Pass
Water Vapor Permeance	ASTM E96, Procedure A	0.02 perms
Maximum Service Temperature	ASTM C411	Faced: 250° F (121° C), Unfaced: 350° F (177° C)
Mold Growth	ASTM C1338	Pass
Water Vapor Sorption (by weight)	ASTM C1104	5% or less
Surface Burning Characteristics (flame spread/ smoke developed)	ASTM E84, CAN/ULC S102, UL 723 STM E84	Unfaced, FSK: UL/ULC Classified FHC 25/50 PSK: 25/50

Thermal Performance

FORMS AVAILABLE
DENSITY	THICKNESS	WIDTH	LENGTH	FACING	R-VALUE (K VALUE) @ 75° F MEAN TEMPERATURE
DENSITY	THICKNESS	WIDTH	LENGTH	FACING	OUT-OF PACKAGE			INSTALLED [AT 25% COMPRESSION]
0.75 PCF (12 kg/m³) 1.0 PCF (16 kg/m³) 1.5 PCF (24 kg/m³	1½" (38 mm)	48" (1,219 mm)	100' (30.48 m)			R-5.1 (0.29)	R-4.2 (0.27)
	2" (51 mm)		75' (22.86 m)	FSK, PSK, Unfaced	R-6.8 (0.29)		R-5.6 (0.27)
	2 3⁄16" (56 mm)		75' (22.86 m)		R-7.4 (0.29)		R-6.0 (0.27)
	3" (76 mm)		50' (15.24 m)		R-10.2 (0.29)		R-8.4 (0.27)
	1½" (38 mm)		100' (30.48 m)		R-5.6 (0.27)		R-4.5 (0.25)
	2" (51 mm)		75' (22.86 m)		R-7.4 (0.27)		R-6.0 (0.25)
	1½" (38 mm)		75' (22.86 m)		R-6.1 (0.24)		R-4.8 (0.23)
	2" (51 mm)		50' (15.24 m)		R-8.2 (0.24)		R-6.4 (0.23)

¹ The lower the value, the better the performance.

2 The higher the value, the better the performance.

Acoustical Performance

ACOUSTICAL PERFORMANCE
DUCT WRAP				INSERTION LOSS (Hz)
DUCT DIMENSIONS	SHEET METAL	NOMINAL THICKNESS	NOMINAL DENSITY	63	125	250	500	1000	2000	4000
12" x 12" (305 mm x 305 mm)	24 GA	1^1/2" (38 mm)	0.75 PCF (12 kg/m3 )	0.6	0.6	0.6	0.7	7.4	14.2	20.9
24" x 12" (610 mm x 305 mm)	24 GA	1^1/2" (38 mm)		0.6	0.6	0.6	0.7	7.4	14.2	20.9
48" x 12" (1219 mm x 305mm)	22 GA	1^1/2" (38 mm)		0.6	0.5	0.5	0.6	7.4	14.1	20.9
24" x 24" (610 mm x 610 mm)	22 GA	1^1/2" (38 mm)		0.6	0.5	0.5	0.6	7.4	14.1	20.9
24" x 12" (610 mm x 305 mm)	26 GA	1^1/2" (38 mm)		0.8	0.8	0.8	0.8	7.5	14.2	21.0
24" x 8" (610 mm x 203 mm)	26 GA	2" (51 mm)		1.0	1.0	1.0	3.6	10.4	17.1	23.9

Insertion Loss: (Reduction of Sound Transmitted Through Duct Wrap) (Sound and Vibration Design and Analysis, National Environmental Balancing Bureau, 1944)

Friction Loss

LABELED THICKNESS	INSTALLED COMPRESSED THICKNESS	ROUND	SQUARE	RECTANGULAR
LABELED THICKNESS	INSTALLED COMPRESSED THICKNESS	P* +	P* +	P* +
1" (25 mm)	^3/4" (19 mm)	7" (128 mm)	6" (152 mm)	5" (127 mm)
1^1/2" (38 mm)	1 1⁄8" (29 mm)	9^1/2" (241 mm)	8" (203 mm)	7" (178 mm)
2" (51 mm)	1^1/2" (38 mm)	12" (305mm)	10" (254 mm)	8" (203 mm)
2 3⁄16" (56 mm)	1 5⁄8" (42 mm)	13" (330 mm)	11" (279 mm)	8^1/2" (216 mm
3" (76 mm)	2^1/4" (57 mm)	17" (432 mm)	141/2" (368 mm)	11^1/2" (292 mm)

All Product Resources

March 2021 (PDF / 515.92 KB)

Manson Insulation/Alley Wrap B/Literature/manson-alley-wrap-b-data-sheet

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October 2020 (PDF / 566.15 KB)

Safety Data Sheet - Alley Wrap B

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October 2020 (PDF / 674.41 KB)

Safety Data Sheet - Alley Wrap B - Spanish

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October 2020 (PDF / 566.26 KB)

Safety Data Sheet - Alley Wrap B - Canada - English

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October 2020 (PDF / 569.59 KB)

Safety Data Sheet - Alley Wrap B - Canada - French

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October 2022 (PDF / 538.02 KB)

UL Environmental Claim Validation - Formaldehyde Free - Alley Wrap B

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October 2022 (PDF / 666.10 KB)

GREENGUARD - Alley Wrap B

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October 2022 (PDF / 676.33 KB)

GREENGUARD Gold - Alley Wrap B

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October 2022 (PDF / 538.70 KB)

UL Environmental Claim Validation - Recycled Content - Alley Wrap B

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December 2022 (RVT / 1.50 MB)

Revit File- Alley Wrap™ B

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June 2024 (PDF / 372.22 KB)

Sell Sheet - Contract - Alley Wrap B

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June 2024 (PDF / 1.17 MB)

Sell Sheet - Contractor - Alley Wrap B - Spanish

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June 2024 (PDF / 372.82 KB)

Sell Sheet - Contract - Alley Wrap B - French

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PROJECT PROFILE

Northwell Surgical Pavilion in New York chose Manson fiberglass insulation products to control heat and humidity for their new state-of-the-art medical building.

Read About Northwell Surgical Pavilion

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