Installing waterproof tanking membrane

Basement Waterproofing

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Tanking Membrane

Tanking membrane is the term used to describe sheets of high-density polyethene dimpled (HDPE) waterproof material which are then studded to line walls and floors, providing a waterproof barrier that keeps Earth retaining walls and underground rooms dry.

The most common application of tanking membrane is as part of a cavity drainage waterproofing system to transform damp basements or cellars into dry and habitable rooms, however, tanking membranes can also be used to solve localised penetrating damp problems. To discuss installing waterproof membrane in your home contact our specialists today on 0800 0121 437.

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Tanking membrane with a cavity drainage system

Tanking membrane is used in cavity drainage systems to manage and control water ingress from Earth retaining walls.

Without an adequate drainage system, any water that penetrates the outer wall due to hydrostatic pressure will remain trapped behind the membrane. Although this will prevent any immediate damp problems in your basement or cellar, without an adequate drainage system this water will remain in place and could eventually lead to some very serious problems like wet rot or dry rot.

With a drainage system installed, however, the water trapped behind the tanking membrane gathers into that system and is simply channelled safely away from the property without any further intervention from you. Drainage can utilise either existing drains or a sump pump, leaving you free to relax in your protected and dry basement or cellar!

How to install waterproof membrane

The most important point to note is that if the tanking membrane is installed incorrectly, if it tears or punctures during fitting, or if it is not sealed off effectively, then this will compromise the effectiveness of the entire system. That is why we say it is essential that you hire a professional and qualified waterproofing team who can demonstrate their credentials, such as our accreditations from the PCA the British Structural Waterproofing Association and others.

Although each project is custom built and tailored to the exact specifications of the individual room, broadly speaking, our tanking membrane installation process includes:

  1. Removing any sodden, damp or mouldy plaster from the affected areas and replastering for a fresh surface on which to apply the membrane.
  2. The tanking membrane is then cut to fit and applied to the wall using plaster plugs. We will then seal off the membrane and areas around the plugs to create a totally water-tight area.
  3. If the membrane is being installed as part of a cavity wall drainage system then we will also install suitable drainage channels around the perimeter of the room to ensure that any water is filtered out of the property.

You are then free to plaster or board over the wall and decorate your basement or cellar however you wish, safe in the knowledge it is now totally waterproof.

Benefits of tanking membrane

  • A flexible waterproof solution, tanking membrane can be cut and fitted to suit almost any basement or cellar space.
  • A robust waterproofing system, tanking membrane isn’t susceptible to dampness caused by hydrostatic pressure, unlike cementitious tanking alone which can fail under certain circumstances.
  • If you install a tanking membrane waterproof system with us, then it will be designed to comply with BS8102, which is the Code of Practice for Protection of Below Ground Structures Against Water From the Ground.
  • we will provide you with a 10-year waterproofing guarantee.

Contact the tanking membrane specialists

Would you like to know if tanking membrane is the most suitable method to waterproof your underground space? Simply contact our waterproofing team on 0800 0121 437 and they can discuss the best way to get started transforming your damp and leaking basement into a fantastic safe, dry and habitable room.

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