Twistfix

Waterproof membrane for basement tanking systems.

Our waterproof membrane products form an impermeable barrier that keeps cellars dry. At the heart of our basement tanking systems is the cavity drain membrane.

Cavity drain membranes form part of a drained protection scheme for water that seeps through brickwork or concrete. The system transforms damp and water-logged cellars into dry living areas.

What is a Basement Waterproofing Membrane?

Waterproof membranes are HDPE barriers that block the passage of water. They have an egg-tray-like shape. The stand-off studs form an air gap between the structure and the habitable space. The void serves as a drainage channel. Hence, they are also known as cavity drain membranes.

The studded membrane isolates wet cellar walls and floors from dry internal surfaces. Any water seeping through the basement structure drains behind the membrane into channels and sumps. From there, pumps discharge the flow to an outside drain. The system complies with BS 8102 for Type C waterproofing. It is simple to use in new-build and existing buildings.

Which Cavity Drain Membrane is Suitable for Cellar Floors?

You can use a Baseline 8 mm or a Baseline 20 mm. The decision rests on the amount of potential water intrusion. The former has a drainage capacity of 4.95 litres per sqm and the latter more than 14. You also have the option to buy the 20 mm waterproof membrane in a bright yellow colour. The contrast between the hi-viz plastic and the black rubber tapes makes sealing the joints easy.

What is the Right Membrane for Tanking Basement Walls?

For waterproofing walls, our 8 mm studded membrane is the most popular. It comes in two forms. The first is our Baseline 8. Use this product if you want to fit a stud wall in front of the barrier. The second option is our Baseline Mesh. It has a mesh layer that provides a key for a range of finishes. You can plaster directly onto the mesh. You can also use a dot and dab plasterboard adhesive.

Twistfix offers more basement tanking options. You can choose from the following range of watertight barriers.

Use our two-layer cavity membrane for external use on new-build basement projects. The product includes a geotextile mat. This external drainage and protection sheet fits on the outside face of the structure. It blocks the passage of water and contaminants from the surrounding soil.

Our 3 mm air gap membranes come with a mesh surface. The mesh face allows for the direct application of plaster. They are ideal for use in isolating damp surfaces from internal finishes. The low-profile studs make the Baseline 3 tanking membrane ideal for use after damp-proofing. You can also use it in wet rooms and showers.

Our basement tanking systems form trustworthy watertight barriers. Each waterproofing membrane is BBA Approved and compliant with BS 8102.

We stock cavity drain membranes in various roll sizes and stud depths. We offer trade prices and fast delivery across the UK. Don't hesitate to contact us for advice on choosing the best type of waterproof membrane for your needs. Our expert team are always happy to help.

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Baseline 8 mm cavity drain membrane

Baseline 8 mm cavity drain membrane

Waterproof membrane for tanking walls and floors. 8 mm cavity drain membranes in 40 and 48 sqm rolls for basement waterproofing. Leaves surfaces ready for dry wall lining or floor screeds. Sizes: 2 x 20 m or 2 x 2.4 m.
Price excl. VAT
£117.73
Price incl. VAT
£141.28
Waterproof Membrane – Baseline 8 Kit

Waterproof Membrane – Baseline 8 Kit

Waterproofing membrane kit with everything needed for waterproofing. Sizings 2 x 20m or 2 x 2.4m of floor or wall. Fix studs to basement membrane plugs for dry-lining walls. Lay screed direct.
Price excl. VAT
£196.76
Price incl. VAT
£236.11
Plaster Membrane – Baseline Mesh

Plaster Membrane – Baseline Mesh

Basement waterproofing membrane for tanking walls. Mesh membranes have a tough HDPE mesh surface for direct application of wall plaster or adhesive dabs for plasterboard. Sizes: 2 x 20m or 2 x 10m roll
Price excl. VAT
£134.04
Price incl. VAT
£160.85
Baseline Mesh Membrane Kit

Baseline Mesh Membrane Kit

Mesh membrane kit in 3 sizes with everything needed for waterproofing wall surfaces. These waterproof tanking membranes include a mesh face for direct application of plaster or dabs for plasterboard. 2.20m or 2.10m sizings
Price excl. VAT
£178.68
Price incl. VAT
£214.42
20 mm Hi-Viz Cavity Drain Membrane

20 mm Hi-Viz Cavity Drain Membrane

Wykamol CM 20 mm Hi-Viz cavity drain membrane for waterproofing basement floors. 40 sqm high-visibility yellow tanking membranes are in stock and sold in at trade prices. 2 x 20 m.
Price excl. VAT
£303.51
Price incl. VAT
£364.21
Damp Check – Mesh Membrane Kit

Damp Check – Mesh Membrane Kit

Damp Check Kit provides an effective moisture barrier when isolating damp walls from internal finishes. The air gap behind the damp-proof membrane allows walls to breathe and water to drain. 10m Kit
Price excl. VAT
£85.00
Price incl. VAT
£102.00
Waterproofing Membrane – Baseline 20

Waterproofing Membrane – Baseline 20

Cavity-drain membrane with 20mm studs for use on cellar floors with 20mm studs. A membrane with high cavity drain capacity. Ideal for basement waterproofing leaving ready for flooring. Roll sizes: 2 x 10m or 2 x 20m
Price excl. VAT
£131.73
Price incl. VAT
£158.08
External Waterproof Membrane – GeoTex

External Waterproof Membrane – GeoTex

Double-layered waterproof cavity drain membrane for foundation waterproofing in new-build applications. High density polyethylene membrane bonded to a geotextile mat. Roll size 2m x 20m (40m2)
Price excl. VAT
£174.26
Price incl. VAT
£209.11
Slimline 3 Floor Membrane

Slimline 3 Floor Membrane

A low profile 3mm cavity drain waterproof membrane for sealing damp concrete floors without extensive surface preparation. Size: 2 x 20m
Price excl. VAT
£168.02
Price incl. VAT
£201.62
Tanking Membrane

Tanking Membrane

A cost effective high density polyethylene tanking membrane with 3mm studs formed on one face of the product and a mesh welded to the other side. Available at a special trade price in a 1m x 10m , 1m x 20m or 2m x 20m roll
Price excl. VAT
£48.00
Price incl. VAT
£57.60
Basement Membrane – 6 rolls

Basement Membrane – 6 rolls

Basement membrane for tanking walls and floors in basement waterproofing schemes. Cavity drain membranes are available in 40m2 and 48m2 rolls for cost effective basement waterproofing. Multi-Pack: 6 rolls. Sizings: 2 x 20m or 2 x 2.4m.
Price excl. VAT
£755.53
Price incl. VAT
£906.64