NBS Source
PIFA Approved Damp Proof Membrane

Application

For use in solid concrete ground floors not subject to hydrostatic pressure, to protect buildings against moisture from the ground.

Description

PIFA approved low density polyethylene membrane, for use in solid concrete ground floors not subject to hydrostatic pressure, to protect buildings against moisture from the ground. The membranes and the methods of jointing provide an effective barrier to the passage of liquid water and water vapour from the ground and have a high resistance to puncture. On smooth or blinded surfaces they will not be damaged by foot or site traffic, e.g. wheelbarrows. Exposure to ultraviolet light, including sunlight will embrittle the membrane and is therefore not recommended for uses where it is exposed to long periods of outdoor weathering. Offers high chemical resistance.


Performance:

  • Tear strength: 40 N/mm.
  • Tensile strength: 14.4 mPa
  • Water vapour transmission rate (to BS 3177): 1.0 g/m²/day (250 µm), 0.8 g/m²/day (300 µm), 0.5 g/m²/day (500 µm).


General information

Material

Extruded low density polyethylene (PE-LD) blown film

Uniclass

Pr_25_57_65_60 Plastics sheetsPrimary

CAWS

J40/120 Loose-laid plastics or rubber sheet damp-proofing

J40/130 Loose-laid plastics or rubber sheet oversite damp-proofing

J40/20 Loose-laid plastics or rubber sheet damp-proofing

J40/30 Loose-laid plastics or rubber sheet oversite damp-proofing

Specification data - Plastics sheets Enhanced data

Material

Extruded low density polyethylene (PE-LD) blown film.

Physical properties

-

Colour

Blue.

Black.

Dimensions

-

Thickness (minimum)

250 µm.

300 µm.

500 µm.

Width (minimum)

2 m.

4 m.

Roll length (minimum)

12.5 m.

25 m.

50 m.

Accessories

None.

Girth Tape.

75 mm width, single sided.

Mastic Tape.

50 mm width, double sided.

Literature

PIFA Certificate

PIFA Certificate

Third party certifications

QA Certificate

QA Certificate

PIFA Approved

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