Reinforced Polythene Building Membranes
Economical reinforced polythene vapour check

850 Vapour Check is a lightweight reinforced polythene vapour check for use inside insulation in wall and roof construction to prevent warm, moist air from inside the building condensing within the insulation. The reinforced construction resists tears and punctures that can quickly compromise the performance of ordinary building films.

Construction

850 Vapour Check is a multilayer membrane with UV stabilised polythene for vapour resistance and a woven polypropylene reinforcing mesh to resist tearing and punctures. Grade 850 is transparent/translucent and both surfaces have a smooth, gloss appearance.

Technical Data

Basis Weight (g/m2)		152 g
Tensile Strength	-MD	3.4 kN/m
	-CD	2.4 kN/m
Nail Tear Resistance	-MD	60 N
	-CD	60 N
MVTR		0.61 g/m2/d
Vapour Resistance		336 MNs/g

Fixing/Sitework

The membrane is laid over the liner panel and all seams sealed with a suitable butyl double-sided adhesive tape. It is covered by the insulation, then a breather sheet, and the external roof covering fixed.

Availability

Standard Roll Size	2000mm x 50m
Roll Weight	13.5 kg

All information given in good faith and is believed to be accurate. Technical data is based on laboratory testing and represents average values. Specific lots may vary above or below these values.