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355mm Metal Storm/Weathering Collar manufactured to DW144 spiral duct specification. Storm/Weathering Collar. No fixings supplied.
Note 1: A Storm/Weathering collar is Used to wrap around the spiral ducting at roof level to stop water from entering the building. Manufactured to DW144 spiral ductwork specification and delivered as one piece.
Note 2: To ensure that the building is water tight a bead of silicone should be applied between the spiral duct and the collar to make a weather tight seal. Sealants can be purchased from our fixings/sealants section.