Owens Corning, Mechanical Operations Div.
One Owens Corning Parkway
Toledo, OH 43659
Tel: (419) 248-8000
Web site: http://www.owenscorning.com

Description & Uses

• Fiberglas® All-Service Duct Wrap is a blanket of glass fiber insulation factory-laminated to FRK vapor retarder facing with a 2" (50mm) stapling and taping flange on one edge.
• Designed to meet existing performance standards such as NFPA 90A/90B and other model building and energy codes.
• Used for external insulation of commercial and residential heating, air conditioning and dual-temperature ducts operating at temperatures from 40°F (4°C) to 250°F (121°C).
• This insulation, when applied in accordance with installation instructions, will provide the “installed R-value” as published for the product and printed on the facing, assuring the specified in-place thermal performance and condensation control.

Recommended Thickness

• Owens Corning recommends a minimum of 2" (51mm) for protection against excessive heat loss or gain.
• Selection of insulation thickness and application of insulation are the responsibility of the engineer and contractor.
• Thickness also effects condensation as indicated on the Condensation Control Chart.

Limitations

• Fiberglas All-Service Duct Wrap is not recommended for use on duct systems subject to continuous service at temperatures in excess of 250°F (121°C).
• It should not be exposed to weathering or mechanical abuse without proper protection.
• It should not be used on the inside of ducts.
• Guide specification available.
• Avoid usage where surface condensation may be an issue.

Features & Benefits

• When installed in accordance with instructions so the compression is controlled, Fiberglas All-Service Duct Wrap provides specified thermal performance. Assured thermal performance controls operating costs due to reduction of heat loss or gain through duct walls.
• Helps control moisture condensation on the ductwork as well as on the outer vapor retarder jacket. This helps maintain insulation efficiency and reduces the likelihood of stained ceilings due to moisture damage.
• Contributes to the delivery of conditioned air to occupied spaces at or near design temperatures. By conserving heating and cooling energy, HVAC systems may operate under reduced load.
• When installed correctly, complies with model energy codes and standards including ASHRAE 90.1 and 90.2.  Architects, contractors, code officials and owners are assured of compliance and “no-problem” inspection.
• Easy to cut and fit to flat, curved and irregular duct surfaces for a neat, thermally effective insulation blanket. Because it’s easier to install than rigid boards, installation costs are lowered.

Application Recommendations

• Before applying Fiberglas® All-Service Duct Wrap, ducts should be clean, dry and tightly sealed at all joints and seams.
• It should be cut to “stretch-out” dimensions and a 2" (50mm) (approx.) piece of duct wrap removed from the facing at the end of the piece to form an overlapping staple and tape flap.
• Install duct wrap tightly butted with facing outside. Overlap the 2" (50mm) formed tape flap and facing at other end of the piece of duct wrap.
• If ducts are rectangular or square, install so insulation is not excessively compressed at corners.
• Seams should be stapled 6" (150mm) (approx.) on center with outward clinching staples.  Adjacent sections of duct wrap should be tightly butted with the 2" (50mm) tape flap overlapping.
• Seal all seams and joints with pressure-sensitive tape matching the facing (either  plain foil or FRK backing stock) or glass fabric and mastic. Cloth duct tape of any color and finish using reclaimed rubber adhesives is not recommended for use on Fiberglas All-Service Duct Wrap.
• Where rectangular ducts are 24" (600mm) in width or greater, duct wrap shall be additionally secured to the bottom of the duct with mechanical fasteners such as pins and speed clip washers, spaced on 18"(425mm) centers (maximum) to prevent sagging of insulation. It is neither necessary nor desirable to adhere duct wrap to duct surfaces.
• Where a vapor retarder is required, seal all tears, punctures and other penetrations of the duct wrap facing using one of the above methods to provide a vapor-tight system.
 
 

Specification Compliance

• ASTM C 1290, Flexible Fibrous Glass Blanket Insulation Used to Externally Insulate HVAC Ducts, Type III

• ASTM C 1136, Flexible Low Permeance Vapor Retarders for Thermal Insulation, Type II (facing only)

• ASTM C 553,‡ Mineral Fiber Thermal Insulation: Type I – Fiberglas All-Service Duct Wrap Type 75; Type II – Fiberglas All-Service Duct Wrap Types 100 and 150. (Operating temperatures to 250 °F (121 °C) and thermal values to 150 °F (66 °C) (mean).

‡ Preferred specification is ASTM C 1290. NOTE TO SPECIFIERS – Federal Specification HH-I-558B (Amendment 3), Form B (covering the duct wrap),  and Federal Specification HH-B-100B (covering the facing), are obsolete. These are replaced by the above referenced ASTM specifications.

 

Physical Property Data

Property	Test Method	Value
Operating temperature	ASTM C 411	250°F (121°C)
Insulation jacket temperature limit	ASTM C 1136	150°F (66°C)
Water vapor permeance	ASTM E 96	0.02 perms
Water vapor sorption	ASTM C 1104	<3% by weight at 120°F (49°C), 95% R.H
Fungi  resistance	ASTM C 1338	Meets requirements
Thermal conductivity k at 75°F mean,  Btu•in/hr•ft²•°F ( at 24°C mean, W/m•°C)	ASTM C 518	Type     Type     Type 75         100       150 0.30      0.27      0.25 (0.043)  (0.039)  (0.036)
Surface burning characteristics	ASTM E 84*	Flame spread:       25* Smoke developed:  50

*The surface burning characteristics of these products have been determined in accordance with ASTM E 84. This standard should be used to measure and describe the properties of materials, products or assemblies in response to heat and flame under controlled laboratory conditions and should not be used to describe or appraise the fire hazard or fire risk of materials, products or assemblies under actual fire conditions. However, results of this test may be used as elements of a fire risk assessment, which takes into account all of the factors which are pertinent to an assessment, of the fire hazard of a particular end use. Values are reported to the nearest 5 rating.