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Sealing/detailing Ductwork boots prior to installing registers

user-3152143's picture

There is a lot of focus on sealing ductwork but very little about the terminations.

Question:  what is the best way to seal the termination of supply/return boots to the living space prior to installing registers?

  • Do you just use foil tape from the inside of the boot to the drywall ceiling / flooring material?
  • What other details/methods if any?