0.15 mm thick, polyethylene based vapour control layer.
A 0.15 mm thick, polyethylene based, vapour control layer. Sarnavap 500E is manufactured from low density polyethylene, blended to produce a vapour control layer that is flexible when cold, resistant to chemicals and ageing and rot proof. It is suitable for use in most mechanically fastened systems using the Sarnafil PVC membranes only. Not suitable for high humidity applications or under green roofs.
Water vapour resistance: >450 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.
Low density polyethylene (LDPE)
J42/10 Warm deck roof covering
J42/395 Air and vapour control layer
Sarnavap jointing tape
Sarnafil Type T
Standard product features
Low density polyethylene (LDPE).
Thickness: 0.15 mm.
Width: 5.0 m.
Roll width: 1.3 m.
Roll length: 25 m.
G410-EL Adhered Roof System - Sarnavap 1000E
G410-EL Adhered Roof System - Sarnavap 5000E SA
G410-EL Adhered Roof System - Sarnavap 500E
G410-EL Adhered Roof System – Sarnavap 500E
G410-EL Ballasted Roof System - Sarnavap 1000E & S-Felt T 300
G410-EL Ballasted Roof System - Sarnavap 1000E & Sarnafil G445-13
G410-EL Ballasted Roof System - Sarnavap 5000E SA & S-Felt T 300
G410-EL Ballasted Roof System - Sarnavap 5000E SA & Sarnafil G445-13