London Waterproofing Solutions Ltd              020 3794 4200 info@londonwaterproofing.co.uk

Is Your Basement Flooding?

We can help, call us on 020 3794 4200 or book a free visit from one of our CSSW qualified surveyors

Flooding Basement?

We can help, call us or book a free survey

 

Basement Waterproofing & Tanking

Basement flooding is a worry you don’t want to have, but when you do, you want it fixing quickly. In London, flooding is a risk for homeowners and businesses. The increase in heavy rainfall means that London basements and cellars are flooding more often.

Basements will almost always be damp because of the way they are made. Moisture present in the ground penetrates through the walls and floors of cellars and basements. Flooding occurs when water in the ground builds up against the structure, creating hydrostatic pressure. The groundwater level can increase because of heavy rainfall, location of the property near watercourses, construction of nearby basements, or a burst water main. You might only see a small amount of water enter your basement during flooding, but you may find that water can enter your cellar quickly in a short space of time.

Whether you have just moved into a London home or your long-term residence is experiencing more flooding problems, it can be treated. With the right waterproofing system in place, you can make basement flooding a thing of the past.

 

Basement in clay soil

Clay based soils present a high risk of ground water flooding.

Basement in perched water table

As water percolates into the ground, it doesn’t drain away freely, sitting against the structure.

Flooding basement in perched water table

The resulting hydrostatic pressure exploits weaknesses in the structure, causing the basement to flood.

Basement Waterproofing & Tanking

Basement flooding is a worry you don’t want to have, but when you do, you want it fixing quickly. In London, flooding is a risk for homeowners and businesses. The increase in heavy rainfall means that London basements and cellars are flooding more often.

Basements will almost always be damp because of the way they are made. Moisture present in the ground penetrates through the walls and floors of cellars and basements. Flooding occurs when water in the ground builds up against the structure, creating hydrostatic pressure. The groundwater level can increase because of heavy rainfall, location of the property near watercourses, construction of nearby basements, or a burst water main. You might only see a small amount of water enter your basement during flooding, but you may find that water can enter your cellar quickly in a short space of time.

Whether you have just moved into a London home or your long-term residence is experiencing more flooding problems, it can be treated. With the right waterproofing system in place, you can make basement flooding a thing of the past.

 

Basement in clay soil

Clay based soils present a high risk of ground water flooding.

Basement in perched water table

As water percolates into the ground, it doesn’t drain away freely, sitting against the structure.

Flooding basement in perched water table

The resulting hydrostatic pressure exploits weaknesses in the structure, causing the basement to flood.

Waterproofing Your Basement

Basement waterproofing can be done in different ways, depending on your needs. The appropriate waterproofing system will be installed based on whether you want to use your basement for dry storage or you want to convert it into another room.

If you want to waterproof your basement, you should get a CSSW qualified surveyor to complete it for you. Waterproofing of below ground structures, including basements and cellars, is covered by the code of practice BS8102:2009. The design of your waterproofing system will consider:

  • The proposed use of the basement
  • Accessibility for maintenance
  • Suitability of the chosen method for the structure

 

Which Basement Waterproofing Method Is Right For You?

The code of practice states that the risk of flooding should be assumed at some point during the life of the structure, so you can feel rest assured that your basement is protected if you take the necessary steps. BS8102:2009 provides two methods for waterproofing an existing cellar or basement.

Type A Barrier System (Tanking)

The Type A barrier system, better known as tanking, is when a waterproof render or tanking slurry is applied to the walls and floors of a basement or cellar area. This acts as a barrier between your home and the water, keeping water out of your property.

It sounds like the perfect solution, but it might not be right for your home. Tanking relies on obtaining a good bond to the substrate. With many existing basements and cellars constructed of brick, the preparation required can often mean the use of grit blasting or bush hammering, which can create a lot of dust and debris. If a good bond is not obtained, then the risk of failure is increased especially when the tanking render is subjected to hydrostatic pressure. There is also a risk of movement causing cracking of render coats and failure.

If you want to add fixtures and fittings to your London basement or cellar, this can cause more problems with the tanking method. Penetrating the render can lead to dampness or even flooding, which would invalidate your warranty and put your property at risk. If you aren’t sure whether basement tanking is right for you, contact us for a free survey.

Failed tanking render in a vault

Failed tanking render in a vault.

Type C Cavity Drainage Membrane

 

The most popular method for waterproofing basements and cellars is the Type C cavity drainage system. This is the industry standard and the most reliable system you can get for your home. A polymer studded membrane is installed and applied to the walls and floor. Using drainage channels around the perimeter, it leads to either a sump and pump or existing drainage systems. By managing the water entering the basement, you won’t have to worry about additional stresses induced within the structure from hydrostatic pressure.

Anyone hoping to modify their basement or cellar space after waterproofing will find that the Type C system makes it easier to add fixtures. A dry lined wall can be installed onto the cavity drainage membrane, allowing the addition of electrical outlets, shelving, and other fixtures easily and without compromising the seal.

Unlike the Type A method, there is little to no preparation needed, meaning that the new cavity drain system can be installed with minimal disruption to your home. You can start using your new space in no time.

 

Cavity drainage system installed in a vault

Cavity drainage system installed to a vault, ready for dry lining.

Cavity drain membrane to basement flat

Cavity drain membrane installed to basement flats

Find CSSW Qualified Surveyors in London

BS8102:2009 states that a CSSW qualified surveyor has to be involved in the design team to ensure correct waterproofing system design in a new basement construction. We have experience in waterproofing London basements, as we have designed and installed a number throughout the city, from new builds to renovations. Throughout the construction process, our surveyors will be there for you. If you have any questions or there are potential issues while waterproofing your London cellar, they will let you know and help you find the right solution.

Warranty providers often have extremely strict requirements when it comes to basement waterproofing. For new builds, two forms of waterproofing are needed by providers such as CRL, LABC, and NHBC. Our CSSW qualified surveyors can advise you on the best options for your home and ensure any waterproofing meets both regulatory and warranty requirements.

 

Waterproofing Your Basement

Basement waterproofing can be done in different ways, depending on your needs. The appropriate waterproofing system will be installed based on whether you want to use your basement for dry storage or you want to convert it into another room.

If you want to waterproof your basement, you should get a CSSW qualified surveyor to complete it for you. Waterproofing of below ground structures, including basements and cellars, is covered by the code of practice BS8102:2009. The design of your waterproofing system will consider:

  • The proposed use of the basement
  • Accessibility for maintenance
  • Suitability of the chosen method for the structure

Which Basement Waterproofing Method Is Right For You?

The code of practice states that the risk of flooding should be assumed at some point during the life of the structure, so you can feel rest assured that your basement is protected if you take the necessary steps. BS8102:2009 provides two methods for waterproofing an existing cellar or basement.

Type A Barrier System (Tanking)

The Type A barrier system, better known as tanking, is when a waterproof render or tanking slurry is applied to the walls and floors of a basement or cellar area. This acts as a barrier between your home and the water, keeping water out of your property.

It sounds like the perfect solution, but it might not be right for your home. Tanking relies on obtaining a good bond to the substrate. With many existing basements and cellars constructed of brick, the preparation required can often mean the use of grit blasting or bush hammering, which can create a lot of dust and debris. If a good bond is not obtained, then the risk of failure is increased especially when the tanking render is subjected to hydrostatic pressure. There is also a risk of movement causing cracking of render coats and failure.

If you want to add fixtures and fittings to your London basement or cellar, this can cause more problems with the tanking method. Penetrating the render can lead to dampness or even flooding, which would invalidate your warranty and put your property at risk. If you aren’t sure whether basement tanking is right for you, contact us for a free survey.

Failed tanking render in a vault

Failed tanking render in a vault.

Type C Cavity Drainage Membrane

 

The most popular method for waterproofing basements and cellars is the Type C cavity drainage system. This is the industry standard and the most reliable system you can get for your home. A polymer studded membrane is installed and applied to the walls and floor. Using drainage channels around the perimeter, it leads to either a sump and pump or existing drainage systems. By managing the water entering the basement, you won’t have to worry about additional stresses induced within the structure from hydrostatic pressure.

Anyone hoping to modify their basement or cellar space after waterproofing will find that the Type C system makes it easier to add fixtures. A dry lined wall can be installed onto the cavity drainage membrane, allowing the addition of electrical outlets, shelving, and other fixtures easily and without compromising the seal.

Unlike the Type A method, there is little to no preparation needed, meaning that the new cavity drain system can be installed with minimal disruption to your home. You can start using your new space in no time.

 

Cavity drainage system installed in a vault

Cavity drainage system installed to a vault, ready for dry lining.

Cavity drain membrane to basement flat

Cavity drain membrane installed to basement flats

Find CSSW Qualified Surveyors in London

BS8102:2009 states that a CSSW qualified surveyor has to be involved in the design team to ensure correct waterproofing system design in a new basement construction. We have experience in waterproofing London basements, as we have designed and installed a number throughout the city, from new builds to renovations. Throughout the construction process, our surveyors will be there for you. If you have any questions or there are potential issues while waterproofing your London cellar, they will let you know and help you find the right solution.

Warranty providers often have extremely strict requirements when it comes to basement waterproofing. For new builds, two forms of waterproofing are needed by providers such as CRL, LABC, and NHBC. Our CSSW qualified surveyors can advise you on the best options for your home and ensure any waterproofing meets both regulatory and warranty requirements.

 

Get Your Free Survey Now

At London Waterproofing Solutions, we will carry out a free survey of your basement to understand your requirements and design the right waterproofing system for you. Your fully qualified CSSW surveyor will carry out the survey and be your point of contact throughout the work.

You’ll receive a detailed report after the survey, and when you decide to go ahead with the London waterproofing installation, our team of qualified technicians will be there for you. When the work is completed, your lead technician, Project Manager and/or surveyor will sign off the work and provide you with a 10-year guarantee for the property and a system manual. For a small additional fee, our standard guarantee can be underwritten by Guarantee Protection Insurance, for added peace of mind. The cost of the insured guarantee is based on the value of the contract and will be confirmed with your initial quotation.

You can book your free survey now. Call 020 3794 4200 or fill in our contact form.

10 Year Guarantee

On completion of the installation, we will issue you with a 10 year guarantee. Our guarantees are issued for the property making it simple to transfer in the event of a sale. We do not charge for updating guarantee information with a new homeowner.

For a small additional fee, our standard guarantee can be underwritten by Guarantee Protection Insurance for your peace of mind. The cost of the insured guarantee is based on the value of the contract and will be confirmed with your initial quotation.

 

Customer Testimonials

Great Team

"Jon and Tom are efficient and well organised, polite and appreciative and extremely pleasant to boot! Oh!…and the finished product… pretty amazing. Brilliant, thank you. Very best wishes. Carolyn"

Carolyn Anderson, 6th November 2014

London Waterproofing Solutions Ltd
5
2015-05-20T21:31:47+01:00

Carolyn Anderson, 6th November 2014

"Jon and Tom are efficient and well organised, polite and appreciative and extremely pleasant to boot! Oh!…and the finished product… pretty amazing. Brilliant, thank you. Very best wishes. Carolyn"

Major Damp Issue in Basement

"We had a major damp issue in the basement. LWS came almost straight away. They gave fantastic advice and explained all the possible scenarios. They also managed to move another job so we could start the work quicker. The job was completed ahead of schedule and aftercare information is now being shared. Would definitively recommend and use again. (Although hopefully no need!)."

James Heale, 21st September 2016

London Waterproofing Solutions Ltd
5
2016-09-21T15:58:21+01:00

James Heale, 21st September 2016

"We had a major damp issue in the basement. LWS came almost straight away. They gave fantastic advice and explained all the possible scenarios. They also managed to move another job so we could start the work quicker. The job was completed ahead of schedule and aftercare information is now being shared. Would definitively recommend and use again. (Although hopefully no need!)."

Recommended Trader

"Peter Barber came to give me a quote. I already had a quote from another company for £ 4 500.00. Peter was honest, a true professional, and told me I didn't need any work done to the flat, he didn't find any rising damp, just moisture which he gave me an address where I could find a fan. I feel relieved and I very happy to recommend this trader. It was the best phone call I made in months! Peter saved from stress, loss of money, and having work done in my flat which wouldn't have been needed. A big thank you to Peter."

Elisabeth Lecourt, 24th April 2015

London Waterproofing Solutions Ltd
5
2015-05-20T19:58:12+01:00

Elisabeth Lecourt, 24th April 2015

"Peter Barber came to give me a quote. I already had a quote from another company for £ 4 500.00. Peter was honest, a true professional, and told me I didn't need any work done to the flat, he didn't find any rising damp, just moisture which he gave me an address where I could find a fan. I feel relieved and I very happy to recommend this trader. It was the best phone call I made in months! Peter saved from stress, loss of money, and having work done in my flat which wouldn't have been needed. A big thank you to Peter."

Basement Flat Damp Issue

"We had a serious damp issue in our basement flat, and London Waterproofing did a great job in fully damp proofing the bedroom and bathroom. I was nervous about the work because of the size of the project, and because we couldn't stay at the flat whilst it was being done, but the company was great to work with. Peter was always on hand for any queries or issues, and when we had a separate problem with a water pipe leak, the team went out of their way to help sort it out. Overall, it was a really positive experience, and I am more than happy to recommend them."

Juman Kubba, 6th January 2015

London Waterproofing Solutions Ltd
5
2015-05-20T21:30:45+01:00

Juman Kubba, 6th January 2015

"We had a serious damp issue in our basement flat, and London Waterproofing did a great job in fully damp proofing the bedroom and bathroom. I was nervous about the work because of the size of the project, and because we couldn't stay at the flat whilst it was being done, but the company was great to work with. Peter was always on hand for any queries or issues, and when we had a separate problem with a water pipe leak, the team went out of their way to help sort it out. Overall, it was a really positive experience, and I am more than happy to recommend them."

Highly Recommended

"It has been a pleasure to have you work on my flat. I was greatly impressed by your professionalism and integrity. I could not have wished for a better response in terms of timing, being and keeping your word and quality of work. I would highly recommend you to any of my friends and colleagues. Heather"

Heather Butensky, 2nd April 2015

London Waterproofing Solutions Ltd
5
2015-05-20T20:10:20+01:00

Heather Butensky, 2nd April 2015

"It has been a pleasure to have you work on my flat. I was greatly impressed by your professionalism and integrity. I could not have wished for a better response in terms of timing, being and keeping your word and quality of work. I would highly recommend you to any of my friends and colleagues. Heather"

Basement Waterproofing

"Thanks again for the work you and your team have done waterproofing our basement room. We're extremely pleased with the service and quality of work we've had from you."

Toby Bourne, 5th February 2015

London Waterproofing Solutions Ltd
5
2015-05-20T21:29:53+01:00

Toby Bourne, 5th February 2015

"Thanks again for the work you and your team have done waterproofing our basement room. We're extremely pleased with the service and quality of work we've had from you."

Basement Tanking

"LWS tanked my very damp basement so I could use it as a snug/televison room. I love it and the result was exactly what I wanted. The team were punctual, clean and very amiable to deal with. I would recommend this team to do a good job for you."

Pam Winkworth, 5th August 2014

London Waterproofing Solutions Ltd
5
2015-05-20T21:33:25+01:00

Pam Winkworth, 5th August 2014

"LWS tanked my very damp basement so I could use it as a snug/televison room. I love it and the result was exactly what I wanted. The team were punctual, clean and very amiable to deal with. I would recommend this team to do a good job for you."

Excellent Service

"I just want to thank you so much for the excellent service with the tanking on the above project. You did everything you said you would and more. You have to be one of the most helpful people I have come across in this business in the 26 years that I have been developing. I would gladly recommend you to any of my clients, let me know if you are on linked in and I will put you on my page. All the best Susan Mc Fedries"
Susan Mc Fedries, 23rd May 2014
London Waterproofing Solutions Ltd
5
2015-05-20T21:41:51+01:00
Susan Mc Fedries, 23rd May 2014
"I just want to thank you so much for the excellent service with the tanking on the above project. You did everything you said you would and more. You have to be one of the most helpful people I have come across in this business in the 26 years that I have been developing. I would gladly recommend you to any of my clients, let me know if you are on linked in and I will put you on my page. All the best Susan Mc Fedries"

Membrane in a new basement

"We had London waterproofing come and put up the membrane in a new basement we had dug, these guys are the best I have worked with for quality, cost and workmanship. Peter is a great guy to deal with, bending over backwards to make sure the job ran smoothly. I am very impressed with the final product and have no hesitation in getting them to do more work for us in the near future. Peter thanks for a perfect job. Allan site manager"

Allan McClune, 16th March 2015

London Waterproofing Solutions Ltd
5
2015-05-20T20:11:07+01:00

Allan McClune, 16th March 2015

"We had London waterproofing come and put up the membrane in a new basement we had dug, these guys are the best I have worked with for quality, cost and workmanship. Peter is a great guy to deal with, bending over backwards to make sure the job ran smoothly. I am very impressed with the final product and have no hesitation in getting them to do more work for us in the near future. Peter thanks for a perfect job. Allan site manager"

Honest Advice

"Peter Barber came to quote on what I assumed to be rising damp. He spotted immediately that the damp wall was caused by a leaking gutter and downpipe. Sorting this problem out will be so much quicker, easier and cheaper than replacing a damp proof course. Thank you for your honesty."

Ruth Douglas, 16th September 2014

London Waterproofing Solutions Ltd
5
2015-05-20T21:32:41+01:00

Ruth Douglas, 16th September 2014

"Peter Barber came to quote on what I assumed to be rising damp. He spotted immediately that the damp wall was caused by a leaking gutter and downpipe. Sorting this problem out will be so much quicker, easier and cheaper than replacing a damp proof course. Thank you for your honesty."

How a company should be run

"How a company should be run. Quality and service are faultless. A company who make dealing with damp almost enjoyably! - I have appointed Peter and his company numerous times and am reliably delighted by product and service. An excellent company who I am always proud to recommend to friends."

Graham Erickson, 21st September 2016

London Waterproofing Solutions Ltd
5
2016-09-21T15:55:23+01:00

Graham Erickson, 21st September 2016

"How a company should be run. Quality and service are faultless. A company who make dealing with damp almost enjoyably! - I have appointed Peter and his company numerous times and am reliably delighted by product and service. An excellent company who I am always proud to recommend to friends."

Valuable Advice

"Peter showed utmost professionalism and integrity on each visit; providing rapid responses and clear explanation of all aspects of the job without a 'hard sell'. He also gave valuable advice on combating our condensation problems and also wrote us an independent surveyors report at no extra cost. His team were early, very tidy and finished the work earlier than anticipated. I asked a number of tradesmen to quote, but service of this level is rare and much appreciated! Whilst I hope I won't be needing their services again, I wouldn't hesitate to recommend London Waterproofing Solutions!"

CLAIRE LUKMANJI, 29th June 2014

London Waterproofing Solutions Ltd
5
2015-05-20T21:35:49+01:00

CLAIRE LUKMANJI, 29th June 2014

"Peter showed utmost professionalism and integrity on each visit; providing rapid responses and clear explanation of all aspects of the job without a 'hard sell'. He also gave valuable advice on combating our condensation problems and also wrote us an independent surveyors report at no extra cost. His team were early, very tidy and finished the work earlier than anticipated. I asked a number of tradesmen to quote, but service of this level is rare and much appreciated! Whilst I hope I won't be needing their services again, I wouldn't hesitate to recommend London Waterproofing Solutions!"
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