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Poly / Wrap
Polyethylene Sheeting
- Available in wide sheets, minimizing the number of seams
required.
- Seams and edges should be supported on both sides to maintain
the seal
- A thickness of 0.15 mm (6 mil) now commonly installed as an
air barrier because it is more durable on the construction site.
- Should be protected from exposure to sunlight. When exposed to
sunlight over extended periods, a UV-stabilized polyethy-lene
should be used.
- Should be clear, made from virgin material and labelled.
Should conform to the Canadian General Standards Board standard
for polyethylene.
- Can also function as a vapour barrier.
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Housewrap
- Available in wide sheets, minimizing the number of seams
required.
- Acts solely as an air barrier; does not function as a vapour
barrier.
- Generally used to wrap the exterior of a house; often bonded
to exterior glass-fibre sheathing.
- When installed on the exterior, acts as a wind barrier,
preventing wind from reducing the effective RSI value of
insulation.
- Should be protected from extended exposure to sunlight.
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(Site under
Construction)
