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A 0.225 mm thick, high performance, polyethylene based, vapour control layer, suitable for use in high humidity environments & green roofing systems if not punctured (loose laid only), loose-laid ballasted warm roof systems and all mechanically fastened systems using both Sarnafil PVC & FPO membranes.


Water vapour resistance: > 1500 MNs/g.


Loose laid over any smooth surface with all side and end laps overlapped a minimum 80 mm, then sealed with Sarnavap jointing tape. At parapets and upstands, Sarnavap must be carried up to the upper edge of the thermal insulation and sealed to the upstand/ penetration with Sarnavap jointing tape, to form an airtight seal. When installed vertically, Sarnavap must be mechanically fastened along its top edge.

If the surface is rough, a layer of Sarnafil Type T should be used as cushioning layer.

Specification data
Product Reference

Sarnavap 2000E


Sarnavap jointing tape

Sarnafil Type T

Standard product features


High density (HDPE) and low density polyethylene (LDPE).


  • Thickness: 0.225 mm.
  • Width: 4.0 m.
  • Roll width: 2.0 m.
  • Roll length: 25 m.




Green (opaque).

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