Waterproofing | Delta Force Basements

Q: What waterproofing systems do you install?

We install Type C cavity drain membrane systems (Delta MS range) with sump pumps as our primary solution. Where required, we also use Type A tanking systems and resin injection to seal leaks.

Q: Do you waterproof both new and existing basements?

Yes. We waterproof both new build basements and existing structures. For new builds, we integrate the waterproofing during construction. For existing basements, we install membranes and pumps to create a dry, usable space.

Q: How often should sump pumps be serviced?

We recommend servicing sump pumps every 6 to 12 months, depending on usage. Regular servicing helps prevent blockages, pump failure, and flooding.

Q: Are your waterproofing works guaranteed?

Yes. All systems are installed to BS 8102:2022 standards and come with a long-term guarantee for peace of mind.

Why Choose Us for Basement Waterproofing?

Your Basement’s Best Defence Starts with Us

We’re more than just waterproofing experts — we’re your partners in protecting what matters most. Whether you're dealing with a damp basement, mould issues, or recurring water leaks, our team delivers lasting solutions backed by experience and integrity.

✅ Proven Experience

With years of experience in the industry, we’ve helped thousands of homeowners reclaim dry, healthy basements. Our technicians are trained, certified, and equipped with cutting-edge tools and techniques.

✅ Lifetime Warranties

We stand behind our work with industry-leading warranties, providing you with confidence that your basement will remain dry for years to come.

✅ Custom Solutions

No two basements are the same. We design custom waterproofing plans tailored to your home’s unique foundation, soil conditions, and drainage challenges.

✅ Fast, Clean, and Professional

We respect your time and your space. Our crews work efficiently, leave no mess behind, and treat every home like it’s their own.

✅ Locally Owned & Trusted

As a local company, we understand the specific challenges that basements face in London. We're proud to serve our neighbours with honest pricing and reliable results.

✅ 24/7 Emergency Support

Water problems don’t wait — and neither do we. Our team is available around the clock to address urgent issues and protect your home from further damage.

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Book a Free Basement Survey Today

Looking for expert basement construction, waterproofing, underpinning, or groundworks in London? Delta Force Basements deliver reliable, high-quality results to a waterproof shell – ready for fit-out.

Contact us now:
Delta Force Basements
Tel: 020 8092 0756
Mobile: 07405 046475
Email: groundworkcontractors@hotmail.com
Opening Hours: Mon–Fri 08:30–18:00, Sat–Sun 09:00–14:00

We provide free surveys across Greater London. Get in touch today and let’s start your project.

Compliant, Certified & Guaranteed

We adhere to BS 8102:2022 standards for below-ground waterproofing and collaborate with CSSW-qualified technicians. Our team uses only proven, BBA-approved materials to give you total peace of mind.

Our Waterproofing Solutions Include:

Tanking Systems – Cementitious coatings applied to walls and floors to block water ingress.
Cavity Drain Membrane (CDM) – A modern waterproofing solution that collects and redirects water to a drainage system or sump pump.
Injection Resin Waterproofing – High-pressure injection to seal leaks and fill cracks in concrete or masonry.
Sump Pump Installations & Repairs – Professional sump system design, installation, servicing and emergency repairs.
External Waterproofing – For new builds or where access is available, we apply external membranes and land drainage.

Office number 02080920756

Sump Pump Installation

It is essential for preventing basement flooding. Our team will install a reliable sump pump system that efficiently pumps out excess water, keeping your basement dry and safe.

Sump Pump Installation is crucial for preventing basement floods, and our reliable systems ensure efficient water removal when needed.

Prevent basement flooding
Efficient water pumping
Reliable system installation

On going Sump Pump Servicing

Regular servicing of your sump pump is crucial for its proper functioning. Our Ongoing Sump Pump Servicing includes maintenance checks, repairs, and replacements if needed, ensuring your system is always ready when you need it.

Ongoing Sump Pump Servicing keeps your sump pump in top condition, ready to handle any excess water and protect your basement.

Regular maintenance checks
Repairs and replacements
System readiness

07405046475

What waterproofing systems do you install?

We install Type C cavity drain membrane systems (Delta MS range) with sump pumps as our primary solution. Where required, we also use Type A tanking systems and resin injection to seal leaks

Do you waterproof both new and existing basements?

Yes. We waterproof both new build basements and existing structures. For new builds, we integrate the waterproofing during construction. For existing basements, we install membranes and pumps to create a dry, usable space.

How often should sump pumps be serviced?

We recommend servicing sump pumps every 6 to 12 months, depending on usage. Regular servicing helps prevent blockages, pump failure, and flooding.

Are your waterproofing works guaranteed?

Yes. All systems are installed to BS 8102:2022 standards and come with a long-term guarantee for peace of mind.

We are also proud to be a Delta-approved installer, and we include a Delta-backed warranty.

“I was impressed by the professionalism and quality of work provided by Delta Force Basements. Their waterproofing service has given me peace of mind about my basement's protection.”