Service
Independent structural waterproofing design that genuinely owns the scope.
From RIBA Stage 2 brief-shaping through performance specification, contractor selection, and construction monitoring. The design follows BS 8102:2022 and is defensible against design-team scrutiny. And, when it matters, against expert witness scrutiny.
What you get
The three commitments that define a CLW appointment.
Goldilocks design
Robust enough to perform for the lifetime of the building. Efficient enough to avoid the cost of over-specification. Multi-disciplinary coordination with the rest of the design team.
RIBA 2–4 · BS 8102:2022 · CSSW + WDS registered designers
Performance specification writing
Specifications that open competitive tender among competent specialist contractors against their preferred products. Best-value procurement, not lowest-price race.
Performance spec · Open tender · Independence preserved
Contractor accountability
CLW remains appointed as client-side advisor through construction. Inspections at critical stages. Authority to challenge contractors when work departs from design intent.
Construction monitoring · CMT input · BS 8102 Clause 8
When to appoint
As early as RIBA Stage 2.
The earlier CLW is appointed, the more options remain on the table. By RIBA Stage 4, key Type A/B/C decisions and structural interfaces are often locked in. Sometimes against waterproofing best practice.
A CLW appointment at Stage 2 lets the design team shape the brief in ways that prevent risk rather than mitigate it. By Stage 3 we're producing the performance specification, and by Stage 4 we're in tender support and contractor selection.
Where the appointment comes later, Stage 4 or beyond. We do still help. The framing shifts from prevention to triage.
Talk to us about your scheme.
Send a project brief or put our AI agent to work first. Both routes get you a useful first answer in the right register.