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AlkorPlus® 81012 vapour control layer

Extruded, blown LDPE vapour control layer for use in Alkor roofing systems.

AlkorPlus® will not rot or swell and is resistant to bitumen and oil. It conforms to DIN 18530/5 for application as a vapour barrier in construction.


The vapour control layer is loosely laid over the deck with minimum side and end laps of 50 mm, which are sealed with AlkorPlus® adhesive tape 81057.

General information

Uniclass 2015

Pr_25_57_65_60 Plastics sheetsPrimary


J42/10 Warm deck roof covering

J42/395 Air and vapour control layer

Specification data - Plastics sheets

Product Reference

AlkorPlus® 81012 vapour control layer



AlkorPlus® 81057 adhesive tape

Standard product features


  • Thickness: 0.25 mm.
  • Width: 6.00 m.
  • Roll width: folded on 1.50 m rolls.
  • Roll length: 25 m.
  • Weight: 0.24 kg/m².
  • Roll weight: 36 kg.


Opaque blue.


  • Diffuision equivalent: µ ≈ 450 000, µs ≈ 112.5 m.
  • Water vapour permeability: approximately 0.35 g/m².d.

Third party certifications
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