Division 22 23 Ebook Page 250 Section 23 07 13 Duct Insulation-SOFTR Duct Wrap FRK Guide Spec

DUCT INSULATION 23 07 13 - 4 Duct Insulation - SOFTR Duct Wrap FRK C. Cut SoftR Duct Wrap to stretch - out dimensions per APPENDIX Table 2. Then cut 2 (50mm) of insulation from the cut end and remove from the facing to form an overlapping staple / tape flap. D. Install duct wrap with the facing toward the outside. Tightly butt the insulation seams together. The 2 (50mm) formed tape flap must completely overlap the facing and insulation at other end of the piece of duct wrap. Rectangular or square ducts are to be installed so that the insulation is not excessively compressed at duct corners. The side seams shall be stapled approximately 6 (150mm) on center with outward clinching staples, or held in place with three or four evenly spaced 8 long tape tabs. E. Adjacent sections of duct wrap shall be t ightly butted with the factory 2 (50mm) tape flap edge overlapping the adjoining duct wrap section. In the event that the factory tape flap has been removed, reinstall the 2 (50mm) tape flap as described above. F. When a vapor retarder is required, seal all seams and joints with pressure-sensitive tape matching the facing (either plain foil, FRK backing stock, or aluminize mylar), or with glass fabric and mastic. Cloth duct tape of any color and finish using reclaimed rubber adhesives (example: gray duct tape) is not recommended for use on SoftR Duct Wrap. G. When a vapor retarder is not required, the side seam must be taped to assure the blanket edges are held together to maintain thermal performance and to give a finished appearance. H. 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. I. When installing SoftR Duct Wrap, it is not recommended the use of adhesives to adhere the duct wrap to sheet metal ductwork. When adhesives are used, the insulation is compressed into the adhesive when being installed. The adhesive will not allow the insulation to expand to the desired thickness, therefore affecting the stated R-value and possibly contributing to condensation issues. Additionally, the adhesive could affect the Flame Spread and Smoke Developed Indies of the duct wrap and void all fire ratings. J. 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. 3.5 FIELD QUALITY ASSURANCE A. Upon completion of insulation work and before operation is to commence, visually inspect the work and verify that it has been correctly installed. B. Open all system dampers and turn on fans to blow all scraps and other loose pieces of material out of the duct system. Allow for a means of removal of such material. C. Check the duct system to ensure that there are no air leaks through joints. 3.6 PROTECTION A. Replace damaged insulation, which cannot be satisfactorily repaired, including insulation with duct wrap damage and moisture-saturated insulation.

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