Delta Force Group Ltd are experts in basement waterproofing, sump pumps, underpinning & structural repairs across London. Trusted, reliable & professional.
Why Choose Delta Force
Over 15 years of hands-on experience
Specialists in basement waterproofing and sump pump, Professional underpinning & foundation services
High-quality workmanship, fully guaranteed
Local, reliable London company you can trust
📞 Contact Delta Force Group Ltd today to arrange your free site survey and discover how we can transform and protect your basement space.
Our service's
Delta Force Group Ltd are leading specialists in basement construction across London, building strong, secure, and waterproofed basements for homes and properties. Whether you want to create extra living space, add value to your home, or future-proof your property, our team delivers complete basement solutions from start to finish.
We design and construct new build basements, basements under existing houses, and basements under gardens, using proven methods and high-quality materials. Every project is tailored to meet client requirements, ensuring a safe, durable, and fully waterproof structure.
As part of every basement project, we carry out full waterproofing and damp proofing systems. Using cavity drain membranes, sump pumps, and drainage channels, we make sure your basement remains dry, secure, and ready for fit-out.
Alongside basement construction, we also provide expert underpinning, foundations, structural repairs, and groundworks, giving property owners confidence that their home is built on solid, reliable ground.
By specialising exclusively in shell construction, Delta Force Group eliminates the guesswork and headaches of below-grade work. You get a single point of accountability for excavation, structure, waterproofing and drainage—so your general contractor or homeowners can focus on the finish line, not fight leaks or delays. Choose Delta Force Group and start your project with a truly solid, water-tight foundation
Build a solid, long-lasting basement shell using high-strength reinforced concrete and quality formwork techniques. Our process includes precision excavation, steel reinforcement placement, and expert concrete pouring to create a watertight and structurally sound foundation.
Safeguard your basement against water infiltration with advanced waterproofing solutions. We install exterior membranes, drainage board systems, and integrated interior drainage channels. Combined with high-performance sealants and coatings, these systems provide comprehensive protection against hydrostatic pressure.
Underpinning & Foundation Stabilisation: Address settlement and load-bearing issues with professional underpinning services. Utilising methods such as mass concrete underpinning, mini-piled underpinning, and helical piling, we stabilise and reinforce existing foundations to support additional loads and prevent further movement.
External Drainage & Soil Management Control groundwater and surface water with engineered drainage systems. Our services include perimeter French drains, perforated pipe installation, and soil grading to direct water away from the foundation, reducing hydrostatic pressure and minimising erosion.
Structural Repair & Crack Injection: Repair structural defects and seal cracks with precision techniques. We perform epoxy and polyurethane injection to fill voids and restore concrete integrity. Carbon fibre reinforcement and steel plate installation provide additional strengthening for weakened areas.
Vapour Barrier & Moisture Control: Maintain a dry basement environment with professional vapour barrier installation. Our high-density polyethene membranes and protective coatings prevent soil moisture migration and vapour transmission, preserving air quality and structural materials.
