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SDCI Closures, Service Updates, and Inspection Requirements

SDCI customer service areas remain closed until further notice and continue offering services online. King County has approval from the State Department of Health to allow all private construction activities that are low-risk and adhere to strict COVID 19 Job site Requirements. The City of Seattle has issued requirements for construction projects seeking inspections. The City WILL NOT INSPECT any site that does not follow these requirements.


Summary: Duct wrap is a generic term for foil encapsulated ceramic fiber blankets installed around ductwork to create a fire-rated assembly. Listed duct wraps are products that have been tested and certified by independent testing laboratories to provide a specified period of fire resistance and structural integrity. Underwriters Laboratories lists such products under the “YYET” listing classification code for grease duct enclosures and the “HNLJ” code for ventilation duct enclosures.

Date Revised: 12/09/2010

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