LONDON'S #1 BASEMENT WATERPROOFING EXPERT
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Basement Damp Proofing Tanking Specialists in London
If you’re building beneath the ground or converting your basement, coal chute or cellar to into a liveable or useable space, you need tanking – a seal which stops pressurised groundwater seeping through your walls or floors.
Without tanking – or if tanking is done poorly – your basement or underground stores will become damp, leading to structural weakness, property damage and mould.
At Environ Property Services, we provide a high quality tanking service guaranteed to keep your basement bone-dry for 15-25 years.
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Need tanking in London? Call now to book your survey and tanking quote
Before we tank your basement, we need to determine the correct tanking method, or if you need tanking at all.
We start with one of our qualified surveyors visiting the site to take a series of readings with moisture meters along with a visual inspection of the damp to determine the best method for waterproofing your underground space.
Damp comes in many forms, one of the most common being condensation. If your walls are wet and mouldy but no groundwater is coming through the walls, then your problem is more likely to be poor ventilation – which tanking won’t fix.
If the damp is caused by groundwater seeping through your walls or floor, we have two methods to waterproof your basement: Type A and Type C.
Type A tanking involves applying slurries and membranes over the walls, on top of which we apply fresh paint and plaster. This system will completely waterproof your walls up to eight bars of water pressure.
When we believe the water pressure will exceed what can be safely prevented with a Type A tanking system, we will install Type C.
A Type C tanking system creates a void all the way around your property. Blocked groundwater collects in this void and drains into a gully, where it’s pumped out by a sump pump to join the rest of your wastewater drainage.
Type C tanking systems are more common in areas with very high groundwater levels, such as Fulham, Putney and other Thames-side locations.
While we will always try to provide an accurate quote following our damp survey, sometimes we won’t know which tanking method is appropriate until we strip back the plaster and examine the wall beneath – known as a destructive survey.
There is an extra charge for a destructive survey so we only carry them out as a last resort where meter readings and visual inspection give us inconclusive results.
Whether we use a Type A or a Type C tanking system, we always fully strip away damp materials first, allow the underlying wall to dry out and fill in any cracks that are allowing water inside.
We then apply a four coat system using slurries and membranes from Sika, Delta and Sovereign, three of the world’s leading manufacturers of damp proofing products. Which we use depends on the individual requirements of the site.
Beware quotes that promise a quick fix – tanking needs to be done slowly and carefully with correct drying times between each layer and regular moisture meter readings to ensure the tanking is effective.
Don’t trust cowboys to keep your basement safe, call Environ now for a guaranteed tanking solution
Unfortunately, many of our tanking jobs involved replacing shoddy damp-proofing works installed by cowboy contractors.
For example, certain tanking slurries won’t stick to certain surfaces – a common problem with period masonry. Apply the wrong slurry and, over time, it will simply crumble away from the wall.
We’ve also visited basements where a Type A tanking system was applied when Type C was necessary, causing the water pressure to build up behind the seal until the whole thing was blown off.
Worst of all, many tanking systems are applied without stripping away damp plaster or repairing the wall beneath. Without fail, these shoddy attempts to quickly cover up the problem rather than solve it only lead to more expensive repairs down the line.
Call Environ now to get in touch with our damp experts
Our friendly team of qualified and experienced damp experts take pride in keeping London’s homes and businesses dry, safe and comfortable.
To book your survey, call us now or request a call back today.
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GOODBased on 185 reviewsTrustindex verifies that the original source of the review is Google.Lufi Ditia Prabandari2024-09-21Ricky restored my home after an incident. He was punctual, professional, and thorough. Impressed with his quick work and prevention of damage. Quality exceeded expectations, would hire again. Highly recommended!Trustindex verifies that the original source of the review is Google.swag banna2024-09-19Ricky had great knowledge and gave exceptional service for my home issue. He was professional and courteous. His attention to detail and explanation of the problem impressed me. Ricky's expertise and friendliness gave me confidence in the work. I highly recommend him for any home maintenance needs. Thank you for a job well done!Trustindex verifies that the original source of the review is Google.Margherita Brichetto2024-07-08Emily has provided excellent customer service throughout this process. We booked a survey for a flat we are purchasing. The purchase has been dragging a bit, so I highlighted how important it was to have the survey and report in the shortest amount possible. My appointment was initially booked for the following week, but I received a call a few hours later to check if I would be available to have it the following day, due to a cancellation. On survey day, we received the report (quite well done, with pictures and quotes) before the end of the working day. Highly recommended company, it was a pleasure working with them.Trustindex verifies that the original source of the review is Google.Zia Ali2024-07-05Environ have been excellent. Friendly, helpful customer service on the phone. Today I had Adam, one of the engineers, proofing/sealing multiple entry points for mice and rodents in my flat. There were many cavities to seal up and Adam meticulously assessed the property over several hours. He was very respectful, friendly, and diligent. I felt confidence in what he was doing. I recommend this excellent family-ethos company and their professional hard working team.Trustindex verifies that the original source of the review is Google.marnie serpell2024-06-25Jordan and Cormack were just wonderful . Professional , tidy, explained everything, answered questions and explained even more, punctual . Could not have asked for nicer people to help me sort this mess out and I really hope they will be here for the sequel , coming soon to a drain near me! Really great team . Thank you so much..mTrustindex verifies that the original source of the review is Google.Cabinet Oblique2024-05-23Excellent service and excellent team, very knowledgeable. We will use them again for sure. Thanks all.Trustindex verifies that the original source of the review is Google.Sallie Redman2024-05-10We were pleased. They dealt with mould issues promptly and professionally. The tradesmen were helpful and booking was easy and straightforward.Trustindex verifies that the original source of the review is Google.Indy West2024-04-27Great to work with! We're very happy with the repairs we had done to both the facia of our apartment and the interior - Louie in particular was brilliant. Thanks, Environ!
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