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.

General information

Color

Brown

Finish

Polythene coated

Polythene

Material

Reinforced, bitumen-bonded, building paper laminate

Paper laminate

Size

1 x 25 m

Uniclass 2015

Pr_25_57_10_09 Building papersPrimary

CAWS

H30/261 Air and vapour control membrane

H30/30 Air and vapour control membrane

H31/261 Air and vapour control membrane

H31/45 Air and vapour control membrane

H71/110 Lead sheet fully supported roof covering

H71/130 Lead sheet fully supported wall covering

H71/150 Lead sheet fully supported covering to dormers

H71/160 Lead-covered roofing panels

H71/170 Lead-covered cladding panels

H71/180 Lead-wrapped panels

H71/210 Gutter lining with proprietary expansion joints

H71/230 Valley gutter lining to slate/ tile roofs

H71/235 Valley gutter lining to lead roofs

H71/240 Valley gutter lining to lead roofs

H72/10 Valley gutter lining to slate/ tile roofs

H72/110 Aluminium sheet fully supported roof covering

H72/130 Aluminium sheet fully supported wall covering

H72/150 Aluminium sheet fully supported covering to dormers

H72/2 Aluminium sheet fully supported roof covering

H72/210 Gutter lining with proprietary expansion joints

H72/230 Valley gutter lining to slate/ tile roofs

H72/240 Recessed valley gutter lining

H72/245 Valley gutter lining

H72/250 Weathering to

H72/5 Aluminium sheet fully supported covering to dormers

H72/7 Gutter lining with proprietary expansion joints

H73/10 Gutter lining with drips

H73/110 Copper sheet fully supported roof covering

H73/12 Valley gutter lining to slate/ Tile roofs

H73/130 Copper sheet fully supported wall covering

H73/15 Weathering to

H73/150 Copper sheet fully supported covering to dormers

H73/2 Copper sheet fully supported roof covering

H73/210 Gutter lining with proprietary expansion joints

H73/220 Gutter lining with drips

H73/230 Valley gutter lining to slate/ tile roofs

H73/240 Recessed valley gutter lining

H73/245 Valley gutter lining

H73/250 Weathering to

H73/5 Copper sheet fully supported covering to dormers

H73/61 Sheet underlay

H73/645 Sheet underlay

H73/7 Gutter lining with proprietary expansion joints

H74/10 Valley gutter lining to slate/ tile roofs

H74/110 Zinc sheet fully supported roof covering

H74/12 Weathering to

H74/130 Zinc sheet fully supported wall covering

H74/150 Zinc sheet fully supported covering to dormers

H74/2 Zinc sheet fully supported roof covering

H74/210 Gutter lining with proprietary expansion joints

H74/220 Gutter lining with saddle expansion joints

H74/230 Valley gutter lining to slate/ tile roofs

H74/240 Recessed valley gutter lining

H74/245 Valley gutter lining

H74/250 Weathering to

H74/5 Zinc sheet fully supported covering to dormers

H74/7 Gutter lining with proprietary expansion joints

H75/10 Valley gutter lining to slate/ Tile roofs

H75/110 Stainless steel sheet fully supported roof covering

H75/12 Weathering to

H75/130 Stainless steel fully supported wall covering

H75/150 Stainless steel fully supported covering to dormers

H75/2 Stainless steel sheet fully supported roof covering

H75/210 Gutter lining with proprietary expansion joints

H75/220 Gutter lining with saddle expansion joints

H75/230 Valley gutter lining to slate/ tile roofs

H75/245 Valley gutter lining

H75/250 Weathering to

H75/5 Stainless steel sheet fully supported covering to dormers

H75/51 Sheet underlay

H75/645 Sheet underlay

H75/7 Gutter lining with proprietary expansion joints

P10/310 Air and vapour control layer

P10/60 Air and vapour control layer fixed to studs/ joists/ framing

Specification data - Building papers Enhanced data

Standard

BS 1521, Class A1F.

Weight (minimum)

6.5 kg.

Colour

Brown.

Product Reference

Polybit Building Paper

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.

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