Square Duct Taps & Branching · Double-wall tap
Install branch through both walls
Square Duct Installation — Double-wall main
Task typeDouble-wall tap
Tools / equipmentSnips, insulation tools, sealant
How to install it
- 1
Open outer shell
- 2
remove insulation locally
- 3
cut inner liner
- 4
install/seal inner collar
- 5
restore insulation
- 6
close outer shell.
Quality check
- Inner air barrier verified
- insulation restored
Stop and verify
Stop if inner joint cannot be inspected