Tanking details that stay connected and accessible
Walls and floors linked
We detail membrane junctions so water cannot exploit an untreated edge.
Finishes planned early
Dry lining, plaster, screed or dry-board floors are considered in the design.
Inspection access retained
Suitable drained systems can be checked without dismantling the whole room.
Manage water behind the finished room
Basement tanking must deal with water at walls, floors, joints and every service penetration. We install cavity drain membranes that allow controlled entry behind the lining, form an air gap and guide moisture towards planned drainage. Wall-fixed membranes can sit behind dry lining or plaster finishes, while loose-laid floor membranes can work beneath screed or floating dry-board floors. This approach suits existing basements, cellar conversions, new buildings and retrofit projects. We also assess requirements for barn conversions, damp-proof membranes and gas barriers where relevant to the project. Preparation and continuity matter more than simply covering the visible wet patch.
Understand drained systems and fixed barriers
A conventional cementitious system resists water as a bonded barrier. A drained cavity system accepts that water may reach the structure, then controls it behind the internal finish. The drained approach can include inspection access, making appropriate channels easier to check, test and repair later. We assess water pressure, wall and floor construction, drainage options and intended finishes before choosing an arrangement. Installation includes preparing the substrate, sealing membrane joints and detailing pipes or other penetrations. All our waterproofing systems carry a 10-year guarantee, with optional insurance-backed protection available.
Frequently asked questions
Is cavity drainage the same as cementitious tanking?
No. Cementitious tanking forms a bonded barrier intended to resist water. Cavity drainage allows controlled entry behind a membrane and directs it away. We choose between them according to the structure, water and project needs.
Can basement membranes take different finishes?
Yes. Depending on the system, wall membranes can support dry lining or suitable plaster, while floor membranes may sit below screed or a floating dry-board floor. We plan the finish before detailing the membrane.
What preparation is needed before tanking?
We need suitable access to assess and prepare walls and floors. Joints, corners, drainage routes and service penetrations must be included in the plan, as poor detailing at these points can interrupt the waterproof layer.