Surveyor-reviewed defect guidance
Understanding common property defects
Warning signs deserve context, not instant labels. These guides explain what may cause a symptom, what a visual survey can consider and when further investigation may be sensible.
Defect library
Five important condition themes
A photograph or checklist cannot establish the cause, severity or remedy for an individual building. Use these pages to frame better questions before commissioning the appropriate inspection.
Damp & Moisture
Water infiltration through external walls, rising damp from ground level, and moisture-related damage affecting structure and finishes.
Understand the issueCracking & Movement
Settlement cracks, subsidence damage, structural movement and foundation-related issues affecting the property's structural integrity.
Understand the issueRoof Defects
Slate and tile deterioration, flat roof failures, flashing issues and weather protection defects affecting the primary weather shield.
Understand the issueTimber Defects
Dry rot, wet rot, woodworm, structural timber decay and deterioration affecting the property's structural frame and timberwork.
Understand the issueUnauthorised Alterations
Structural alterations without proper consent, building regulation approval issues and modifications that affect safety or structural stability.
Understand the issueConcerned about a property?
Describe the concern before choosing a service
Send the property details, photographs if available and what you have been told. JBS will explain whether a home survey appears suitable or whether a different specialist should be considered.
Official guidance and further reading
These independent sources explain the wider professional, legal and maintenance context. They do not replace advice about the particular property or its title.
- RICSHouse surveys: the costs, types and benefits of oneHow property age, condition and complexity influence the appropriate level of home survey.
- RICSDamp and mouldConsumer guidance emphasising investigation of the moisture source before deciding on a remedy.
- Historic EnglandUnderstanding decay in an older homeGuidance on moisture, ventilation, materials, ground levels, timber and movement in older buildings.