The Diagnostic Approach: What to Expect
What a Safe-Bricks diagnostic approach actually involves on a Brighton and Hove property — the sequence, what we look at, when we open up, what we report, and why we diagnose before we specify.
Most building failures are diagnosed badly because the diagnosis is skipped. A contractor arrives, sees a symptom — damp plaster, cracked render, a loose flint — and jumps straight to a product: tank this wall, inject a damp course, re-render the elevation, rebuild the section. The symptom goes away for a while, and then comes back, because the thing that was causing the symptom was never identified.
Safe-Bricks works differently. Our approach is diagnostic: we work out what is actually going on before we specify a repair. This guide explains what that process looks like in practice, so you know what to expect before you commission us and why we do it this way.
Why We Diagnose Before We Specify
The traditional building stock in Brighton and Hove — bungaroosh, flint, soft brick, lime-mortared solid walls — does not fail for the same reasons modern cavity construction fails. A damp patch on an 1840s solid wall is not the same problem as a damp patch on a 1990s cavity wall, and the right repair is not the same either. A moisture-meter reading tells you a wall is wet; it does not tell you why. Without the "why," any specification is a guess.
Diagnosing first is not slower or more expensive in the long run. It is the step that prevents you paying for the wrong repair. Our damp investigation approach is built on this principle.
The Photographs-First Stage
Most of our investigations begin with photographs, not a site visit. Before we inspect anything in person, we ask you to send photographs of:
- The complete elevation or room affected
- The specific defect — the crack, the staining, the loose masonry, the failed render
- The area around the defect — gutters, downpipes, roof junctions, parapets, window sills, ground level
- The corresponding internal view where moisture is involved
- Any exposed masonry, where visible
This stage is deliberately broad. The most common cause of a "damp wall" in a Brighton terrace is not the wall at all — it is a leaking gutter or a failed downpipe somewhere above and to the side. A close-up of the damp patch will not show that; a wider photograph often will. From photographs we can usually tell whether the issue appears to be local and straightforward, whether it is likely to involve traditional construction, and whether a site inspection is the right next step.
What We Look at On Site
When we inspect, we look at the building as a system, not at the defect in isolation. A typical diagnostic inspection considers:
- The defect itself — its location, pattern, width, depth, and whether it is active
- The construction — what the wall is actually made of, where it can be established without damage
- Moisture sources — gutters, downpipes, roof coverings, flashings, parapets, window sills, pipe penetrations, plumbing, ground levels, drainage
- Existing finishes — render, plaster, paint, previous repairs, and whether they are compatible with the substrate
- Movement and structure — cracking patterns, openings, bearings, previous alterations
- Ventilation and heating — where condensation is a possible mechanism
- Heritage status — whether the building is listed or in a conservation area, which changes what can be done
We do not rely on a single moisture-meter reading to set the specification. A meter is a useful indicator that an area warrants further investigation; it is not a diagnosis. See our seafront maintenance guide for the external defects we most commonly find driving internal damp.
When We Open Up
Some conditions cannot be confirmed without limited opening-up — removing a small section of render, lifting a board, or carefully exposing a piece of masonry. We only open up where the information is genuinely needed for the specification, and we do it in a controlled way, particularly on listed buildings where opening-up itself can require care.
Opening-up is most often needed for:
- Confirming bungaroosh or mixed masonry behind plaster
- Establishing the bearing condition before a structural alteration
- Investigating the extent of voids or loose material
- Finding the edge of a previous repair
- Establishing why a finish has detached
We photograph what we find, so you and we both have a record of the construction as it actually is, not as it was assumed to be.
What a Proper Diagnosis Produces
A diagnostic approach should leave you with an explanation, not just a quote. After investigation you should understand:
- What the wall is constructed from
- What is actually causing the defect (the mechanism, not the symptom)
- What needs repairing and what can reasonably be retained
- Why the proposed repair addresses the cause
- What the alternatives were and why they were rejected
- Whether consent or further professional input is needed
If a contractor cannot explain why a repair is proposed, that is a sign the diagnosis has not happened. A specification should follow from the building, not from a standard product range.
Why We Don't Start With a Damp Course or a Re-Render
The most common misdiagnoses in older Brighton properties are "rising damp" treated with chemical injection, and "failed render" treated with wholesale re-rendering. Both can be correct in the right circumstances, but both are routinely applied without any investigation of the actual moisture source. If a gutter is saturating the wall, injecting a damp course will not stop the gutter. If the render has failed because of movement, re-rendering without addressing the movement will reproduce the failure. Our diagnostic approach exists to prevent that cycle of pay-fail-pay-again.
When a Site Inspection Is Needed
For minor, clearly local defects, photographs may be enough to advise on next steps. A site inspection is normally warranted where:
- The defect is structural or extensive
- Moisture is involved and the source is not obvious
- The construction is unknown or suspected to be traditional
- A significant alteration is proposed
- The building is listed or in a conservation area
- A specification and quotation are required
For most owners, the simplest first step is to send photographs and tell us what you are seeing. Use our send us photographs route, and we will tell you whether a site inspection is the right next step before any specification is prepared.
Related guides
Why Modern Cement Pointing Damages Historic Brighton Brickwork
An in-depth technical guide exploring the mechanics of moisture movement in traditional solid masonry and why incompatible cement pointing often leads to brick spalling in historic properties.
Read articleDiagnosing Damp in Older Properties
How damp is properly diagnosed in older Brighton and Hove properties — the moisture sources, the investigation sequence, why a meter reading is not a diagnosis, and what a proper diagnosis should produce.
Read articleWhy Lime Render Matters in Traditional Buildings
Why lime render genuinely matters for traditional solid-wall buildings in Brighton and Hove — the moisture mechanics, compatibility, correct specification, curing and decoration that make it succeed or fail.
Read articleNot sure where to start?
Send us photographs of the area of concern. It is the most straightforward first step — we will look at what you can see and advise on the appropriate next steps.