Basement Water­pro­ofing Products

Waterproofing membrane

Water­pro­ofing membrane

Basement water­pro­ofing membrane for tanking cellar walls and floors surfaces. Ideal for basement or cellar conversions.
Membrane Fixing Plugs

Membrane Fixing Plugs

Membrane fixings are an important part of cavity drain membrane systems. They create the waterproof plug that prevents ingress at vulnerable fixing positions.


The process of damp proofing a basement or cellar is often referred to as Basement Tanking.
Waterproofing Tape

Water­pro­ofing Tape

Water­pro­ofing Tapes for all kind of purposes from Twistfix. We supply only high quality water­pro­ofing tapes.
1–12 of 14 items

Wall Waterproof Membrane – Baseline 8

Waterproof membrane for tanking walls and floors. Cavity drain membranes in 40m2 & 48m2 rolls for basement water­pro­ofing. Leaves surfaces ready for dry wall lining or floor laying.
  • RRP £238.80
  • £171.00
  • £142.50
Rating 5.0 of 5

Membrane Plugs

Hammer-in fixing with waterproof seal for use with Baseline 8 & Thermseal water­pro­ofing membranes. Screw wall studs directly into aperture located in plug head. Quantity: 100/ 200
  • RRP £58.80
  • £41.88
  • £34.90
Rating 4.6 of 5

Water­pro­ofing Tape

A high quality water­pro­ofing tape that is applied to the lap joints of abutting cavity-drain membranes. This flexible butyl rubber tape forms a water-tight joint seal. 22.5m x 28mm
  • RRP £47.70
  • £27.48
  • £22.90

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. 20m2 or 40m2 roll
  • RRP £217.20
  • £163.20
  • £136.00

Mesh Membrane Plugs

Hammer-in fixing with waterproof seal for use with air gap mesh membranes. Roughened head provides a key for plaster finishes. Bag quantity: 200
  • RRP £61.44
  • £47.64
  • £39.70

Waterproof Corner Tape

A wide flexible membrane tape for sealing and water­pro­ofing the wall-floor junction of cavity drain membrane systems. This 150mm wide water­pro­ofing tape is available in 20m rolls
  • RRP £99.60
  • £52.44
  • £43.70
Rating 5.0 of 5

Floor Junction Fillet Seal

A cement based waterproof fillet seal for treatment of concrete floor / masonry wall junctions and other surface points of stress. Essential for effective tanking treatments. 25kg
  • RRP £71.28
  • £42.00
  • £35.00

Slimline Mesh Membrane

Slim mesh-faced damp proofing membrane in 3 sizes for direct application of wall plaster or tile grout. Use following DPC cream injection or flood. Enables re-plaster within the drying out period.
  • RRP £155.52
  • £129.60
  • £108.00

Foundation Water­pro­ofing Kit

A foundation water­pro­ofing kit for protecting below-grade walls from ground water in new-construc­tion situations. Epoxy paint, 2-part drainage membrane, fixings and capping strips - 38m2
  • RRP £657.60
  • £522.00
  • £435.00

Overseal Tape

A single sided overseal tape used to seal over the top of lapping membranes. It serves as a vapour barrier and a waterproof seal on externally taped joints 22.5m x 75mm
  • RRP £73.44
  • £61.80
  • £51.50

Water­pro­ofing Putty

Hydraplug water­pro­ofing putty is a quick setting cementitious compound. It is mixed with water and applied as a putty to plug and stop active water leaks. 5kg
  • RRP £33.00
  • £25.80
  • £21.50

Water­pro­ofing Membrane – Baseline 20

Water­pro­ofing membranes 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 size: 40m2
  • RRP £228.00
  • £177.56
  • £147.97

Basement water­pro­ofing products?

The call for converting basements continues to grow in popularity as homeowners seek a cost-effective and reliable method of creating extra living space within the home. Basement water­pro­ofing plays an essential part of any cellar conversion project as it is the key factor in eliminating all possibility of water ingress in order to protect the basement and maintain a dry, warm and healthy area. 

Being underground, a basement is more susceptible to the possibility of unwanted water ingress. The type of basement system to use is therefore an important consi­dera­tion as a variety of methods are available.

basement waterproofing productsCement tanking slurry are one option for a basement tanking solution; it works by blocking water from entering a building under hydrostatic pressure. It is is vital the walls are prepared thoroughly before applying two coats the slurry onto the masonry. Once the final coating has hardened, a coat of plaster is applied to protect the tanking layer from damage in service.

One of the most effective and commonly used system is the instal­la­tion of water­pro­ofing membrane on the walls and floors of the cellar. This cavity drain membrane effectively seals the area and, behind the scenes,­ manages the flow of water to an exit drain; providing consistent protection against the damaging consequences of unwanted water entering the home.

Twistfix damp proof membrane and basement water­pro­ofing products are manufactured to the highest standard and we also provide all of the accessories required such as water­pro­ofing tape and mesh membrane fixing plugs.

Twistfix tanking slurry and floor junction fillet seal carry the same guarantee of quality as our entire range of products and we are the first choice for thousands of customers seeking reliable, cost-effective basement water­pro­ofing products.­ 

An effective basement water­pro­ofing system is vital for the longevity of a cellar conversion.­  It eliminates the need for other damp treatment protects against moulds and allows the converted space area to be enjoyed for many years.