Basement Waterproofing

Whether you are completely refurbishing your basement to utilise the space in your home, or a commercial client planning redevelopment - we offer tailor made waterproofing solutions.

Using leading brand products, our technicians can provide tanking and cavity wall membrane systems including sumps and pump fitting.

We offer two types of waterproofing systems. Used for earth retained walls, basements and vaults:



We provide a 10 year guarantee with this installation. An additional C.G.S. insurance backed guarantee can be purchased.

basement waterproofing

Cementitious replastering or tanking is a technique of applying an mixed slurry waterproofing application directly onto prepared walls and incorporating a floor lap. This application then forms a bond with the masonry causing any water ingress to divert away from the area. A floor lap must be incorporated to form a “tank” system, although with most basement/earth retained areas there are usually windows and doors. This system is not exactly “tanked” it is more “sectional tanked”— which is why it is generally known as cementitious waterproofing.

This system can withstand high water pressure and it most suitable for complex structures, where space is limited and does not require the installation of a pump system.

The downside to cementitious waterproofing is that no drilling/puncturing of the system is allowed as this will break down the tanking effect. With this system decorating has to be delayed to allow for the drying out process of the cementitious waterproofing application.



We provide a 10 year guarantee with this installation. An additional C.G.S insurance backed guarantee can be purchased.

Membrane is fitted to walls/floors using specialist fixing plugs incorporating perimeter drainage channels which leads to an exterior outlet. If there is high water ingress then a sump chamber & pump system is also installed to divert running water via the pump system and then onto an exterior outlet. The chamber is designed to excavate water collected from the installed cavity membrane system. This chamber is placed into the floor at slab level to allow for collected water and to prevent dewatering below this level. This chamber is placed usually in an out of sight but accessible area (some clients have them placed within a cupboard floor/corner section of hallway, etc.)

A flat lid is then placed over the chamber and can be incorporated within floor coverings to allow for easy access for when a service/maintenance check of the internal submersible pump needs to be carried out. Very similar to having a manhole cover that needs to be accessible but is out of the way.

Walls can then be dry lined with an independent frame system, then plasterboard applied and finally a skim plaster finish. Screed or chip-board can be applied to the floor.

With this system decorating can be carried out straight away. The prime advantage of cavity drain membrane is due to the independent frame lining system, you can then hang items onto the walls just as long as you drill into the frame system.

Can be used on crumbling/painted surfaces. Allows pipes/electrical to be hidden behind the system. No build up of water pressure.

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basement waterproofing

pump servicing

Sump & pump system.

The sump chamber is manufactured from high density polyethylene and is designed to resist ground water pressure. Either one or two pumps are then fitted. The sump chamber is fitted with two brass non-return valves to prevent water travelling back into the chamber once the pumps have stopped and a gate value for isolation for maintenance/servicing purposes.

Pump servicing/maintenance

The sump chamber is manufactured using high quality components designed to give a long and trouble free life. With any piece of mechanical equipment regular preventative maintenance is important to keep this product working efficiently on a day to day basis. We recommend the sump & pump system is serviced once a year. (Although we recommend after a new installation of a sump & pump system a 3-6 month routine check should be carried out to make sure everything is running correctly).

Please call our office to book in a pump service or for any enquiries regarding pump servicing and maintenance.

Request a Survey

For more information on our services, or to arrange a personal quotation please contact us.

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