4m x 50m x 500g Black Polythene Vapour Control Layer
4m x 50m x 500g Black Polythene Vapour Control Layer
Our Black Polythene Vapour Control Layer (VCL) is designed to provide superior moisture control and long-lasting performance.
- Trade Quality
- Professional Use
Tree Sisters
Building A Band of Brothers
Product Description
A 500-gauge (125 µm) black polythene vapour control layer for use as a slip membrane and moisture separator beneath floating screeds and insulation. It prevents moisture migration from the sub-base into the screed while allowing the screed to move independently of the substrate, reducing the risk of cracking.
Key Benefits
Application
Lay the polythene sheet across the entire floor area with a minimum 200 mm overlap at all joints. Turn up at walls and columns to at least screed height. No taping of laps is required when used as a slip membrane only. Ensure the surface beneath is clean and free of sharp objects that could puncture the membrane.
Coverage
Each roll covers 200 m² (4 m × 50 m). Allow for 200 mm overlaps at all joints when calculating quantities. For typical rooms, allow approximately 5–10% additional material for overlaps and waste.

£43.19
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Working with our supply chain
For each and every project we work on, we ensure that materials are sourced as close to the site address as possible and attempt to arrange deliveries during off-peak times to minimise congestion on our roads.
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Supporting A Band of Brothers UK
We are proud to support A Band of Brothers UK, a charity helping young men break cycles of violence and crime through mentoring. Every order you place with Screedworks contributes to this vital cause through our easyfundraising partnership.
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Restore & Protect
From January 2021 we are asking our clients to round up their final invoice to the nearest £5, £10 or £20. We will match the amount pledged and then donate the total to Tree Sisters.
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