Internal pattern
Staining, damaged finishes, cracking, corrosion, retained moisture and the relationship between affected areas and the accommodation or structure above or beside them.
Water ingress & leak investigation
Water ingress or a recurring leak?
The visible stain is not always where the water entered. A focused inspection follows the evidence from possible source, through the building, to the area where moisture finally becomes visible.
RICS-regulated practice
Moisture evidence in context
Clear photographic reporting
Follow the route
Source. Pathway. Symptom.
- Roof, wall, balcony, plumbing or drainage sources
- Junctions, service penetrations and concealed routes
- Moisture distribution and residual saturation
- Evidence needed to confirm repair or further testing
Trace the mechanism
Water can travel before it becomes visible
Leaks and water ingress can originate from roofs, rainwater goods, external walls, balconies, plumbing, drainage, neighbouring accommodation or service penetrations. The path through the building may be indirect, particularly where ceilings, cavities or finishes conceal the route.
The investigation therefore compares the location and pattern of deterioration with the building layout, relevant external details and service positions. Where the evidence does not justify a firm conclusion, the report identifies what should be tested next rather than presenting uncertainty as certainty.
Focused assessment
What we assess during a water ingress investigation
The scope is based on the reported leak and the most plausible routes that can be inspected.
External envelope
Relevant roofs, walls, balconies, flashings, gutters, downpipes, windows, joints and exposed details are assessed where accessible.
Services & drainage
Plumbing, waste pipes, soil stacks, service penetrations and drainage arrangements are considered where their position or history could explain the moisture path.
Repair evidence
Previous works, historic reports, photographs and the current moisture condition can be compared where the question is whether an earlier defect has actually been resolved.
When it is useful
A focused water ingress investigation may be appropriate when:
- water appears after rainfall but the entry point is unclear;
- a ceiling or wall has repeatedly stained after repairs;
- there may be a leak from a flat, bathroom or service route above;
- a balcony, flat roof, parapet, window or downpipe is suspected;
- you need independent evidence before reinstatement or further repair work; or
- different contractors have proposed different causes without a clear evidence trail.
What you receive
Evidence that separates what is observed from what still needs to be proved
Condition record
The affected finishes, moisture evidence and relevant external or service defects are photographed and described.
Likely routes
The report explains which routes are supported by the visible evidence and which alternatives remain possible.
Further testing
Where visual inspection is insufficient, the next investigation is identified rather than guessed.
Written conclusions
Findings, limitations and practical next steps are set out in a clear report for the agreed purpose.
The right next specialist
Some leaks need a second-stage test
A surveying inspection is useful for correlating the visible evidence with the building and narrowing the plausible routes. It does not replace specialist testing where the source cannot be confirmed visually.
SurveyAll can help with
- mapping visible damage and retained moisture;
- reviewing roof, wall, balcony and service context;
- comparing previous repair evidence;
- identifying the most proportionate next test;
- providing an independent written record.
Further specialists may be needed for
- plumbing pressure or appliance testing;
- CCTV drainage inspection;
- dye or flood testing;
- specialist roof or waterproofing tests;
- opening-up concealed construction.
Common questions
Water ingress and leak investigations
Can you find a leak if it is not active during the inspection?
Sometimes the visible pattern, retained moisture, building layout and defects provide useful evidence even when water is not actively entering. In other cases, the next step may be monitoring, controlled testing, plumbing checks, drainage investigation or inspection during rainfall.
Does the stain show exactly where water entered?
Not necessarily. Water can travel along structure, service routes, finishes or junctions before becoming visible. The inspection considers likely sources, pathways and the final symptom together.
Do you inspect balconies, roofs and rainwater goods?
Where accessible and relevant to the reported problem, external elements such as balconies, roofs, flashings, gutters, downpipes, junctions and service penetrations are considered as part of the investigation.
Can you carry out destructive opening-up?
The normal inspection is non-invasive unless a different scope is specifically agreed. If opening-up or specialist testing is needed, the report can identify the area or question that should be investigated further.
Do you cover flats as well as houses?
Yes. Water ingress investigations can involve flats, maisonettes and houses, including defects associated with accommodation above, shared building elements, balconies and service routes.
South East London
Water ingress investigations across Greenwich, Lewisham, Bexley and Bromley
SurveyAll investigates leaks and moisture routes in houses and flats, including older London buildings, converted properties and modern developments where shared elements, balconies and service routes can complicate the source.