Anyone who has sloshed around in six inches of water in the basement of a building knows the despair of having this issue happen repeatedly. You can pump out the water, try to find the cause, fix it (temporarily), then have it happen all over again.
There is really only one way to combat persistent flooding of a property that is built below or partially below ground level – that is basement tanking.
When a building sits below ground, water can easily penetrate the porous brick walls. During wet weather, the amount of water builds up and seeps through the walls into the basement.
Persistent flooding can cause serious damage to the fabric of a building. The build-up of water can put pressure on the main structure, weakening the brickwork and foundations. Extensive damp and mould issues can recur. Even if your basement does not flood outright, if there is a consistent smell of damp, then there is an ingress issue that needs resolving before it worsens.
Our experienced surveyors will visit your London property to assess the conditions which led to the flooding. The immediate area surrounding the building is taken into account, the flow of rainwater, the presence of groundwater, and the condition and size of the building. Sometimes a flood simulation is carried out to clarify the points of intrusion.
We then put together a programme of basement tanking works that is designed to eliminate any future risk of flood and water ingress, giving you the confidence to refurbish and redesign your basement into a viable space for living or business.
Membrane Sealed Tanking is a more complex waterproofing system that involves the implementation of a membrane to trap any ingressing water before pumping it away.
The process to implement a Membrane Sealed Tanking system begins with clearing the internal walls of any loose, friable and organic material prior to the installation of the membrane on all applicable walls, floors and ceilings, using specialised plugs. Any necessary piping or plumbing is sealed to the membrane using pre-prepared plugs or plyboard to ensure nothing is disrupted by the basement tanking process. Afterwards, perimeter channels are installed around the base of the walls or floor, leading to a sump and pump system which will carry the water away from the property to a suitable external drainage system.
In the same manner as Type A Waterproofing, Membrane Sealed Tanking installations are usually finished using high-quality plasterboard so that you can decorate your new space with ease.
This basement tanking system is designed to trap any water and guide it into the perimeter channels where it is pumped away safely into the drains. The key difference between Type C Waterproofing and Type A Waterproofing is that Type C removes the water once inside, whereas Type A simply stops it from entering the basement structure.
Boasting over 20 years' experience, the knowledgeable team at Garratt’s Damp & Timber is perfectly placed to survey your property and advise you on the best course of action. Our basement tanking solutions come with a 10-year guarantee, the industry standard so that you are 100% confident the work will last the duration.
We strive to offer honest, no-nonsense advice that works around you and your needs, which is why we offer a survey from one of our qualified surveyors (CSSW: Certificated Surveyor in Structural Waterproofing), complete with a post-survey report of everything we have found. We will answer all questions, such as how much does it cost to tank a cellar, anything you would like to know about the basement waterproofing membrane as well as how long the renovation works are expected to take.
We pride ourselves on offering impartial advice and bespoke service, so please don’t hesitate to get in touch on 0208 535 7536 if you have any questions or if you would like to book a survey. Our catchment area for basement tanking in London includes: