Intrusive Concrete Soffit Surveys: What We Record and Why
Intrusive surveys are often the turning point between “suspected defect” and “designable solution”. When reinforced concrete soffits show signs of deterioration, spalling risk, or water-related damage, a well-planned intrusive inspection provides the evidence needed to confirm the mechanism, quantify severity, and define a repair strategy that is safe, durable, and buildable.
What we record on close access
A good intrusive survey captures more than photographs. It records what is needed to make engineering decisions and to justify those decisions later. Typical evidence includes:
Condition mapping and defect classification (cracking, delamination, spalling, rust staining, leaching)
Measured defect extents and locations (referenced to a clear grid or setting-out datum)
Cover and reinforcement checks (where appropriate, using cover meter and verification during opening-up)
Hammer-tap sounding results (to define delaminated areas beyond visible damage)
Moisture pathways and contributing factors (joints, drainage, leakage points, waterproofing condition)
Controlled opening-up records (size, location, method, findings, photographs at each stage)
Why evidence quality matters
Repair design is only as good as the data behind it. If the survey does not confirm reinforcement condition, cover, delamination boundaries, and likely causes, the repair can become overly conservative, under-scoped, or difficult to deliver. Good evidence supports:
Correct selection of repair method (patch repair, breakout and reinstatement, cathodic protection considerations, coatings)
Clear quantities and workpacks for contractors
Sensible sequencing and temporary make-safe measures where spalling risk exists
Quality hold points and acceptance criteria
Translating findings into repairs
A robust report should end with a clear route to action: what is urgent, what can be programmed, and what needs monitoring. It should also highlight uncertainties and propose next steps if additional data is required. This is especially important where as-built records are limited and assumptions must be controlled.
If you are planning an intrusive survey, we can advise on a proportionate scope, safe access strategy, and how to structure evidence so it directly supports remediation design.