A connected design for water below ground
Three protection types
We compare barrier, integral and drained methods against the project risks.
Critical details included
Joints, penetrations, floors and walls form one continuous specification.
Maintenance considered early
We preserve suitable access to drainage before internal finishes are installed.
Choose protection for the structure and water
Below-ground rooms and structures face different pressures from ordinary external walls. We design structural waterproofing for basements, cellars, retaining walls, lift pits and underground plant rooms by considering the site rather than selecting a system from its name alone. Type A protection uses a barrier such as a membrane or coating. Type B relies on the structure itself, commonly waterproof concrete. Type C accepts controlled water behind cavity membranes and sends it through drainage, often with a sump pump. Ground conditions, expected pressure, construction and intended use determine which type, or combination, is suitable.
Continuity matters at every joint and opening
Water needs only one weak detail. We plan protection around wall and floor junctions, construction joints, service penetrations and drainage routes so the design remains continuous. Access for inspection and maintenance is considered before finishes hide the system. Our approach follows current BS 8102 waterproofing principles and links inspection, design, installation and maintainable drainage. In higher-risk settings, combined forms of protection may be appropriate rather than relying on one line of defence. Every waterproofing system we install carries a 10-year guarantee, with optional insurance-backed protection available.
Frequently asked questions
What do Type A, Type B and Type C mean?
Type A is barrier protection using membranes or coatings. Type B uses an integrally watertight structure, such as waterproof concrete. Type C controls water behind cavity membranes and directs it to drainage.
Can more than one waterproofing type be used?
Yes. Groundwater risk, construction, intended use and the consequences of failure may support combined protection. We assess those factors and the practical maintenance route before preparing the waterproofing design.
Why are joints and penetrations so important?
They interrupt otherwise continuous walls and floors, giving water a possible route through the structure. We detail corners, joints, pipes and other openings as part of the system rather than leaving them until installation.