New answers tagged taping
I just had a new furnace installed. They sealed the ducts with 3" aluminum backed mastic tape. It's expensive stuff, this roll costs $40 on Amazon. It might be cheaper your local HVAC dealer, and I doubt you will find it at Home Depot or Lowes. Carlisle HVAC manufactures a few different mastic tapes, they have a tool to help find a local distributor. Here ...
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