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Waterproofing Systems

Work with an accredited waterproofing company who can provide a full waterproofing warranty for your project.

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Implementing waterproofing solutions within your project is much simpler than you may think when you partner with the correct professionals. We are an accredited installer for waterproofing systems by Delta and Sika as well as other leading manufacturers of cavity drain membranes and other products which help defend your property from water ingress. As an experienced waterproofing company with over 35 years of experience, we ensure the process will be as smooth and efficient as possible, recommending the best approach for your individual project. Our waterproofing solutions are fully warrantied and the design is usually warrantied by the supplier we are partnered with.


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delta waterproofing



cavity membrane waterproofing

4Site Construction: An Established Waterproofing Company

Our fully trained team can adhere to your project requirements in an efficient manner. If we are involved early enough in the process, we can liaise with the waterproofing supplier to continue with the most efficient methodology for your project. We offer these services in line with our other offerings but also independently too. Our extensive knowledge of building systems enables our team to provide efficient and effective implementation of the required waterproofing system


Using an accredited waterproofing company with warranties and guarantees is important to ensure you are receiving a quality service. At 4Site Construction, our teams use the best quality materials and equipment to provide you with a reliable solution best suited to your project requirements. Contact us to speak to our team and get a no obligation quote, we would love to hear from you.

Find out more about some examples of the types of Waterproofing Systems we offer:

Enhance your property with reliable construction services

Why Choose 4Site Construction?

Upmost Attention to Detail

Upmost Attention to Detail

Practicality, safety, longevity and aesthetics are never overlooked by our professional team.

Full Project Managment

Full Project Managment

Years of experience providing quality solutions to meet our clients’ goals has allowed us to perfect the process.

Independant & Flexible

Independant & Flexible

Working around your schedule, count on our team to carry out their work in the most efficient way for you.

Maintaining Professionlaism

Maintaining Professionlaism

Maintaining our high standards at all times, the team are all extremely experienced within the industry.

Responsible & Unobtrusive

Responsible & Unobtrusive

We keep disruption to your daily life as limited as possible, keep you informed through every step of the process.

Case Study

Loughton, Essex – 6 Unit Scheme

service icon Structural
length icon 14 Months
Case Study

Pittshanger Manor and Café, Ealing

4Site excavated and built the basement, lift shaft and internal structural works for the Museum. We then built the café from foundations to completing the whole envelope with a brick finish. These works were all done for the main contractor.

service icon Basement
length icon 19 Months
Case Study

Wandsworth, London – House Refurbishment

We had to underpin the rear of the property, install a basement and fully refurbish this beautiful home.

service icon Underpining
length icon 16 Months

waterproofing floor

Cavity Drain Membrane

Cavity drain membranes tend to be our waterproofing solution of choice as we believe they provide a more effective alternative to the traditional cementitious tanking systems. Delta cavity drain membranes utilise the innovative design process which allows water to penetrate the structure but once inside, the water is held within the air gap and then diverted to a suitable drainage point.

This waterproofing system avoids the build-up of pressure against the wall which can be found with cementitious tanking. The air gap means that the building can breathe and dry out, making it much more effective for waterproofing solutions in many scenarios.

This basement waterproofing system avoids the build-up of pressure against the basement wall which is found with cementitious tanking. The maintenance of the air gap means that the building can breathe and dry out, a much more effective solution for basement waterproofing.


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Waterproof Concrete Systems

Waterproof concrete systems are commonly used in basement waterproofing, but can be used in other areas. This traditionally goes alongside other waterproofing protection, making up part of a full waterproofing system where water-bars may be required as well as tanking and damp proof membranes.

Cementitious Tanking

Cementitious tanking involves applying a concrete slurry substance to the wall which acts as a barrier to the water. This waterproofing system depends on the quality of the wall that the slurry is being applied to, it will not always be an appropriate solution. As an honest waterproofing company, we will never implement a solution we don’t believe will be long-lasting and always recommend the most suitable approach.

If the walls in your property are older or have the potential for significant movement, the cementitious tanking method may not be sustainable. In addition, the build-up of water against the wall can cause problems with the brickwork over time.

Basement Waterproofing

Effective basement waterproofing is a vital part of a basement conversion, but is also highly recommended even if the basement is not in use. Issues with water drainage are a common problem faced with basements, leading to them remain unused. Over time, the constant damp can deteriorate the condition of the buildings foundations and lead to some unpleasant odours in your property and sometimes even structural damage. Basement waterproofing is required to prevent future damage and ensure this underground space in your project stands the test of time.

    Get Your Free Quote Today!

    Our expert team are always on hand to offer advice and recommendations for your construction project. Get in touch today for a free no obligation quote or give us a call on 01376 311 133 .