230713 - ductwork insulation.doc
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- Attached to
- Construct Addition/Fire Suppression B104
- Solicitation number
- FA6656-09-R-0005
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Specification Section 23 07 13 Ductwork Insulation
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SECTION 23 07 13
DUCTWORK INSULATION
PART 1 – GENERAL
1.01 Related Documents:
A.
Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.
1.02
SECTION INCLUDES:
A.
Ductwork insulation and jackets.
1.03
RELATED SECTIONS:
A.
Section 23 01 00 – HVAC Requirements.
B.
Section 23 31 13 – Ductwork and Accessories.
1.04
SUBMITTALS:
A.
Submit Product Data in accordance with Section 23 01 00.
B.
Include product description, list of materials and thickness for each service, and locations.
C.
Submit manufacturer's installation instructions.
1.05
QUALITY ASSURANCE:
A.
Installer shall be a company specializing in insulation application with three (3) years minimum experience.
B.
Materials shall have a flame spread/smoke developed rating of 25/50 in accordance with ASTM E‑84, NFPA 255 and UL 723.
PART 2 – PRODUCTS
2.01
MANUFACTURERS:
A.
Owens‑Corning.
B.
CertainTeed.
C.
Knauf.
2.02
MATERIALS:
A.
Type A: Flexible glass fiber all service duct wrap with a "K" value of 0.25 at 75 degrees F, foil scrim vapor barrier facing, and a density of 1.5 pcf.
B.
Type B: Rigid glass fiber duct board insulation with a "K" value of 0.24 at 75 degrees F, factory applied ASJ white vapor barrier jacket, and a density of 6.0 pcf.
C.
Type C: Flexible glass fiber duct liner with a "K" value of 0.24 at 75 degrees F, and a density of 1.5 pcf. Liner shall be coated air side for a maximum 6,000 ft./min. air velocity.
D.
Adhesives: Waterproof fire‑retardant type.
E.
Indoor Jacket: Factory‑applied.
F.
Outdoor Jacket: Coated glass fiber sheet, 30 lbs/sq. yd.
G.
Lagging Adhesive: Fire resistive to ASTM E‑84, NFPA 255 and UL 723.
H.
Impale Anchors: Galvanized steel, 12 gauge, self‑adhesive pad.
I.
Joint Tape: Glass fiber cloth, open mesh to match jacket.
PART 3 – EXECUTION
3.01
PREPARATION:
A.
Install materials after ductwork has been tested and approved.
B.
Clean surfaces for adhesives.
3.02
INSTALLATION:
A.
Install materials in accordance with manufacturer's instructions.
B.
Supply [and] return [and outdoor] airducts concealed above ceilings shall be insulated with 1‑1/2" thick Type A insulation as follows:
1.
Insulation shall be applied with edges tightly butted. Where duct width exceeds 18", bottom of the insulation shall be additionally held in place with a row of pins and clips down the center on 18" centers.
2.
All joints shall be sealed by taping with 3" wide vapor barrier tape. Patches of tape shall be applied where pins protrude through the facing.
C.
Supply, return and outside air ducts exposed in Mechanical Equipment Rooms and unconditioned spaces shall be insulated with 1" thick Type B insulation as follows:
1.
Insulation shall be fastened to duct with mechanical fasteners. Fasteners shall be spaced 12" to 8" on center with a minimum of two rows per side of duct. Secure insulation in place with washers firmly embedded in insulation.
2.
Seal all joints, breaks and punctures with fire retardant vapor barrier adhesive reinforced with a 3" wide vapor barrier strip similar to that of the facing.
D.
Supply and return ducts exposed in conditioned spaces shall not be insulated. See Architectural reflected ceiling plans for areas with finished ceilings.
E.
Exhaust ductwork shall not be insulated unless noted otherwise.
END OF SECTION 23 07 13
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23 07 13-4
DUCTWORK INSULATION
12910-330
Revised 3/2/09
12910-330
DUCTWORK INSULATION
23 07 13-3
Revised 3/2/09
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