When something is wrong with a building, start with the cause — not the repair.
Focused investigation of cracking, movement, dampness, water ingress, masonry defects and other building problems, with clear evidence and practical recommendations.
A defect survey looks at the problem in detail
A visible crack, damp patch or recurring leak is the symptom. The useful question is why it is happening.
Williams Survey & Design carries out targeted defect investigations where a particular problem needs to be understood more clearly before repair work is commissioned, remedial proposals are accepted or the issue is discussed with a contractor, developer, insurer or other professional.
The inspection considers the defect pattern, surrounding construction, evidence of movement or moisture and any other relevant information available at the time.
The aim is proportionate advice. Where the likely cause can reasonably be established, we explain it clearly. Where further structural, invasive or specialist investigation is genuinely needed, we say so rather than pretending the visual evidence proves more than it does.
Focused Defect Investigation
For one defined defect or a closely related group of issues. Multiple defects, unusually large areas, dispute-related work or specialist dimensional surveys are quoted according to scope.
Different symptoms can have very different causes
Cracking & Movement
Stepped masonry cracking, cracks around openings, distorted walls, suspected settlement and other signs of structural or localised movement.
Dampness & Condensation
Mould growth, surface condensation, penetrating moisture, ventilation problems and dampness where the source is uncertain.
Roofs & Water Ingress
Recurring leaks, roof-covering defects, flashing failures, rainwater goods and moisture entering roof spaces or internal finishes.
Masonry, Brickwork & Tolerances
Bulging or leaning walls, pointing and render defects, lintel concerns, displaced masonry, irregular brickwork, alignment, plumb, level, joint widths and setting-out issues where these form part of the agreed scope.
Floors, Ceilings & Interiors
Uneven or deflected floors, irregular ceilings, cracking, failed finishes and concerns about supporting construction.
Workmanship & New-Build Defects
Recurring or technically complex defects that require investigation beyond routine snagging, including targeted dimensional or workmanship checks against relevant published guidance or tolerances where applicable.
Defects are easier to understand when the evidence is considered in context
Observe → Investigate → Assess → Recommend
A focused defect survey is about building a reasoned picture from the available evidence rather than jumping straight from symptom to repair.
Observe
Record the defect, its location, pattern, extent and relationship with the surrounding construction.
Investigate
Take relevant measurements, moisture readings, levels, alignment checks or other non-destructive observations where appropriate.
Assess
Consider likely mechanisms, construction details, previous alterations, environmental conditions and other available evidence.
Recommend
Set out proportionate repair, monitoring or further-investigation recommendations based on what the evidence supports.
What a defect investigation may include
The exact scope is agreed around the defect rather than using the same checklist for every instruction.
- Visual inspection of accessible affected areas
- Review of the defect pattern and adjacent construction
- Moisture readings where appropriate
- Level, alignment, plumb or dimensional checks where relevant
- Use of appropriate survey equipment where the agreed scope requires more precise dimensional evidence
- Comparison with relevant published tolerances, standards or guidance where applicable to the issue
- Photographic evidence
- Consideration of likely causation
- Practical repair recommendations
- Advice regarding monitoring or further investigation
- Written report setting out the principal findings
What a visual defect survey does — and does not — establish
What we aim to provide
- A clear record of the visible defect and relevant surrounding evidence
- A reasoned view of likely cause where the available evidence supports one
- Practical recommendations for repair, monitoring or next steps
- Identification of matters requiring specialist input
- A written record that can help clients, contractors and other professionals understand the issue
- Clear identification of the evidence relied upon and any material limitations affecting the conclusion
Normally outside a visual inspection
Unless specifically agreed, a focused defect survey is visual and non-destructive. It would not normally include:
- Opening-up or destructive investigation
- Laboratory testing
- CCTV drainage surveys
- Structural calculations or structural-engineering design
- Legal determination of liability, contractual responsibility or negligence
- Expert-witness / CPR Part 35 evidence unless separately agreed as an appropriate appointment
- Testing of electrical, gas, heating or plumbing installations
- Specialist environmental or hazardous-material testing
Where one of these is warranted, we explain why and what type of specialist input would be appropriate.
Defect survey or full building survey?
Choose a Defect Survey when...
You already know the specific issue you want investigated — for example cracking to one elevation, recurring dampness, a leaking roof area or concerns about a particular floor or ceiling.
A focused scope means the inspection can concentrate time and reporting on the problem that matters.
Get a defect survey guide price →Choose a Building Survey when...
You need an assessment of the overall property rather than one known defect, or there are several issues and the condition of the wider building may be relevant.
This is particularly useful for pre-purchase advice and older or altered properties where defects should be considered in the context of the whole building.
Explore Building Surveys →Independent defect investigation with a defined scope
Inspections and reports are undertaken by Luke Haworth ACABE, Associate Member of the Chartered Association of Building Engineers (CABE).
Williams Survey & Design combines professional built-environment qualifications with extensive practical construction, surveying and building-defect experience, supported by appropriate Professional Indemnity and Public Liability insurance.
Evidence-led reporting
Conclusions are based on what can reasonably be supported by the inspection, measurements, photographs, construction context and other information available within the agreed scope.
Appropriate escalation
Where the evidence indicates that opening-up, structural engineering, laboratory analysis, drainage investigation or another specialist discipline is required, the report identifies that need rather than overstating what a visual inspection can prove.
Dispute-related instructions
A normal defect report can provide useful factual evidence, but it is not automatically an expert-witness report or a determination of legal liability. Any such requirement should be discussed before instruction.
Independent advice for different sides of a building problem
Defects do not only arise during property purchases. We assist where there is uncertainty over cause, responsibility or the most sensible remedial route.
Have a defect you need help understanding?
Use the guide-price calculator for a straightforward focused investigation, or contact us with photographs and background information where the issue is complex. We will confirm the inspection scope and fixed professional fee before arranging the visit.
Focused Defect Investigations start from £495. Larger, multiple, specialist or dispute-related instructions are quoted according to scope. No VAT is currently added to Williams Survey & Design professional fees.