Barrier Bac VB-350 - Manual (Page 6)

Tape
⅓ of width
2˝
2 times pipe
circumference
18˝
– 1 –
– 2 –
– 3 –
– 4 –
Measure a piece of Barrier-Bac
Vapor Retarder membrane 18 inch-
es in width and twice (two times)
the circumference of the pipe.
Roll the measured piece of mem-
brane in a roll form approximately
the size of pipe.
Flatten sized roll and make vertical
cuts to approximately one-third of
the width and two inches apart.
Open boot and wrap snugly around
pipe, spreading cuts around base so
strips lay horizontal to base.
Tape around pipe circumference at
top of boot, down side seam of boot
and all two inch horizontal strips.
Cover all seams of membrane with
seaming tape.
All penetrations must be sealed with the Barrier-Bac and BB20T Seam
Tape. For round pipe or posts, please seal penetrations with Pipe Boot.
VB Installation Guidelines 5
Step 4A: Seal Penetrations - Round Penetrations
VB Products Installation Guidelines
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