Filmtex Undertak

Filmtex Undertak is a simple type of underlay on a roll. It is moisture-proof and eminently suitable for use as underlay in non-insulated roof constructions (garages and operational/agricultural buildings, etc.). Filmtex does not absorb condensation and should therefore only be used in cold and well-ventilated buildings.

Areas of application

Filmtex Undertak is a moisture-proof type of underlay on a roll. This underlay cannot absorb condensation and should therefore only be used on non-insulated sloping roofs where the roof or whole building is cold and well ventilated. Filmtex can also be used as a vapour barrier when a strong, robust one is required.
Filmtex Undertak is laid directly on the rafters and has been approved for use on roofs with a minimum pitch of 15o.
This underlay can be laid both vertically and horizontally. On purlin roofs the membrane can be laid both above and below the purlins.
Filmtex is a woven membrane consisting of reinforced polyethylene strips coated on both sides with polyethylene. The woven construction ensures that the membrane is sealed, strong and durable.

Technical data

Water-tightness: waterproof at 2 kPa
Absorption of condensation on roofs with a pitch of 30°: none
Resistance to trampling: greater than 2.3 kN
Roll measurements: 1.30 x 25m
Weight: 140 g/m2