Specialist waterproofing contractors. At Onyx Basement Services Ltd, we take pride in delivering high-quality workmanship from the initial design stage right through to final installation. Our experienced and approachable team provides expert advice and will guide you toward the most effective and durable solutions tailored to your project.

As specialist waterproofing contractors, we protect buildings and structures from water damage by preventing leaks, dampness, and moisture penetration. We assess problem areas, identify the source of water ingress, and recommend tailored solutions. Our work may involve applying waterproof membranes, sealants, or coatings, installing drainage systems, or using advanced techniques like cavity drainage or tanking.

We handle both above-ground and below-ground projects, such as basements, roofs, balconies, and retaining walls. We ensure compliance with building codes, use high-quality materials, and deliver long-lasting results. By preventing structural deterioration, mould growth, and costly repairs and safeguard the property’s integrity and the occupants’ comfort.

We primarily serve London, Birmingham, Cambridge, Oxford, and the South of England.

Get in touch with us today to arrange a free survey and no-obligation estimate.