Novia 500 Gauge Vapour Control Layer


For use as an air leak barrier and vapour control layer (AVCL) in insulated wall, roof and floor applications.


A traditional specification, single-ply, non-laminated, virgin-grade blown polythene material. Its 2.7 m width makes it particularly suitable for use in residential timber frame applications. To provide an airtight seal, it must be installed in conjunction with the Novia two-tape sealing system.

Features and Benefits:

  • Air-leak barrier and vapour control layer (AVCL).
  • Supplied centre-folded in 2.7 m width, ideal for timber frames.
  • Virgin-grade, high-quality material.
  • CE approved and CPR compliant.
  • Complies with BS EN 13984.
  • Easy to install, can see battens (translucent green tint).
  • Minimizes interstitial condensation.
  • Improves the insulation performance.
  • Low cost solution.
  • Helps buildings meet BS 5250.
  • Install with Novia two tape sealing system.
  • Ideal for use with Novia breather membranes in insulated frame applications.


  • For professional installation, all Novia® VCL products should be fully sealed to the structure using a Novia® double-sided butyl tape and one of the foil or BOPP lap tapes. The wider the tape used, the stronger the final seal will be and the easier it will be to install.
  • Novia® recommends the 30 mm wide butyl tape and 60 mm metallized BOPP tape for all standard VCL installations.

General information


Translucent green tint



Virgin grade polythene


Uniclass 2015

Pr_25_57_65_60 Plastics sheetsPrimary


H20/150 Sheet cladding

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

H92/780 Air and vapour control layer

J21/395 Air and vapour control layer

J31/330 Vapour control layer

J41/395 Air and vapour control layer

J42/395 Air and vapour control layer

K10/155 Wall lining system (metal studs)

K11/115 Battened plywood floating floor

K11/125 Battened particleboard floating floor

K11/135 Battened oriented strand board floating floor

K11/145 Battened cement-bonded particleboard floating floor

K11/215 Plywood floating floor

K11/225 Particleboard floating floor

K11/235 Oriented strand board floating floor

K11/245 Cement bonded particleboard floating floor

K11/795 Wall lining on metal framing

K21/110 Wood flooring

K21/111 Wood floating floor

K21/115 Wood laminate flooring

K21/120 Battened wood flooring

K21/130 Battened wood floating floor

K21/140 Battened wood laminate flooring

K21/145 Composite laminate flooring

K21/146 Laminate flooring

P10/310 Air and vapour control layer

P10/60 Air and vapour control layer

Specification data - Plastics sheets Enhanced data


Air-leakage barrier and vapour control layer (AVCL).


BS EN 13984.

Performance characteristics


Tensile strength (minimum)

>101 MD, >93 CD.

Tear resistance

>65 N.

Water vapour resistance (minimum)

>250 MNs/g.

Physical properties




Thickness (minimum)

125/ 500 micron/ gauge.

Width (minimum)

2.7 m wide.

Roll length (minimum)

50 m.

Product Reference

Novia 500 Gauge Vapour Control Layer

Weight (minimum)

15.5 kg.

Nominal weight

115 g/m².

Tensile strength MD

>101 N/50 mm.

Tensile strength CD

>93 N/50 mm.

Moisture vapour permeability

0.68 g/m²/d.

Resistance to water vapour penetration (at 2 kPa)



Novia Double Sided Butyl Tape.

Novia Foil Tape.

Novia Metallised BOPP Tape.

Environmental information

Country of material origin

United Kingdom

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