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 specified or responsibility is determined.
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.
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 & External Walls
Bulging or leaning walls, deteriorated pointing, render defects, lintel problems, displaced masonry and weathering.
Floors, Ceilings & Interiors
Uneven or deflected floors, irregular ceilings, cracking, failed finishes and concerns about supporting construction.
New-Build Defects
Recurring or technically complex defects that require investigation beyond a straightforward snagging inspection.
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 or dimensional checks
- 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
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
- 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.
Request a defect survey →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 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?
Send us the property address, a short description of the problem and any photographs you already have. We can review the enquiry, recommend an appropriate inspection scope and provide a written quotation before you decide whether to proceed.