Polybit Building Paper
Application

Typically used where conditions require a material with additional strength and durability.

Description

A traditional, polythene coated, reinforced, bitumen-bonded, building paper laminate. Manufactured with wet-strength kraft paper and meets the technical requirements of BS 1521, Class A1F for waterproof building papers. The product uses polymer-reinforcing scrim.

Example application:

  • Moisture barrier.
  • Underlays on uninsulated cladding.
  • Temporary protection.
  • Separation layers.
  • Bond breaks.
  • Draught and damp exclusion barriers.

Application:

Typically used where conditions require a material with additional strength and durability.

General information

Features

Moisture barrier

Finish

Polythene coated

Material

Reinforced, bitumen-bonded, building paper laminate

Shape

Roll

Size

1 x 25 m

Uniclass 2015

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Specification data - Building papers

Product Reference

Polybit Building Paper

Standard

BS 1521, Class A1F

Weight (minimum)

6.5 kg

Colour

Brown

Moisture vapour resistance

53 MNs/g minimum.

TensileStrength

12.4 kN/m (M/D), 7.20 kN/m (C/D) minimum to BS 4415, dry

Bursting strength

550 kN/m² minimum to BS 3137, dry

Minimum liquid water resistance

24 hours

Upper temperature stability

Over 70°C

Chemical resistance

Resistant to chemicals found in plaster and cement

Tape

Novia Double Sided Butyl Tape

Novia Metallised BOPP tape

Standard product features

Colour:

Brown.

Features:

Moisture barrier.

Finish:

Polythene coated.

Material:

Reinforced, bitumen-bonded, building paper laminate.

Shape:

Roll.

Size:

1 x 25 m.

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