Cavity Wall Surveys

Professional Cavity Wall Surveys Across East Anglia

Cavity wall defects can lead to dampness, water ingress, heat loss and structural deterioration if left unresolved. Whether you're experiencing penetrating damp, suspect failed cavity wall insulation or require an assessment before purchasing a property, our independent Cavity Wall Surveys provide a thorough investigation into the condition of your external walls.

At Black Ridge Building Surveys, we carry out impartial cavity wall inspections using specialist diagnostic equipment to identify defects and determine their likely cause. We do not install or remove cavity wall insulation, ensuring our recommendations are completely independent.

What is a Cavity Wall Survey?

A Cavity Wall Survey is a detailed inspection of a property's external wall construction to assess the condition of the cavity, insulation (where present) and any defects that may be contributing to dampness or water ingress.

Our survey helps identify hidden problems that cannot be detected during a standard visual inspection and provides practical recommendations for remedial action where necessary.

What We Inspect

Our survey includes an assessment of:

  • External brickwork

  • Cavity wall construction

  • Cavity wall insulation

  • Wall ties (visual assessment where possible)

  • Damp proof course (DPC)

  • Mortar joints and pointing

  • Air bricks and ventilation

  • Window and door openings

  • Lintels

  • Weep vents

  • Expansion joints

  • Signs of structural movement

  • Internal walls affected by damp

  • Areas of water ingress

Common Cavity Wall Defects We Identify

Our surveys regularly identify:

  • Bridged cavities

  • Failed cavity wall insulation

  • Damp cavity insulation

  • Water penetration through masonry

  • Mortar snots bridging the cavity

  • Debris within the cavity

  • Missing or blocked weep holes

  • Defective wall ties (visual indicators)

  • Cracked brickwork

  • Open mortar joints

  • Failed sealants

  • Inadequate ventilation

  • Cold bridging

  • Condensation-related issues

Our Inspection Process

External Assessment

We begin with a detailed inspection of the external walls to identify visible defects that could allow moisture to penetrate the building.

Internal Assessment

We inspect internal walls for:

  • Damp staining

  • Mould growth

  • Moisture damage

  • Salt contamination

  • Decorative deterioration

  • Cold spots

Moisture Diagnostics

Professional moisture meters are used to assess moisture levels within affected walls and surrounding building materials.

Cavity Inspection Camera

Where appropriate, we use a Teslong cavity inspection camera (borescope) to inspect inside the wall cavity through a small drilled access hole. This allows us to identify hidden defects such as:

  • Damp insulation

  • Bridging

  • Mortar debris

  • Water penetration

  • Obstructions within the cavity

The inspection hole is small and can be made good after the survey if required.

Thermal Imaging

Thermal imaging may be used to identify:

  • Cold bridges

  • Missing insulation

  • Damp areas

  • Heat loss

  • Areas requiring further investigation

What Your Report Includes

Every Cavity Wall Survey includes:

  • Detailed inspection findings

  • High-resolution photographs

  • Moisture readings

  • Thermal images (where applicable)

  • Cavity camera images (where applicable)

  • Identification of defects

  • Likely cause of the problem

  • Recommended remedial actions

  • Areas requiring further investigation

  • Professional surveyor observations

Reports are typically delivered within 24–48 hours.

Signs You May Need a Cavity Wall Survey

You may benefit from a survey if you've noticed:

  • Damp patches on internal walls

  • Mould growth

  • Cold walls

  • Water ingress after heavy rain

  • Peeling paint or wallpaper

  • Salting on internal plaster

  • Persistent condensation

  • Suspected failed cavity wall insulation

  • High heating bills

  • Musty odours

  • Cracked external brickwork

Why Choose Black Ridge Building Surveys?

Independent Advice

We do not install, replace or remove cavity wall insulation, ensuring our reports are completely impartial and focused solely on diagnosing the problem.

Specialist Diagnostic Equipment

Where appropriate, we use:

  • Moisture meters

  • Thermal imaging cameras

  • Teslong cavity inspection camera

  • High-resolution photography

  • Drone inspections for high-level masonry and roof defects

This enables us to investigate hidden defects without unnecessary disruption.

Clear Digital Reports

Our reports are professionally presented, easy to understand and include photographs, moisture readings and practical recommendations.

Fast Turnaround

Most reports are delivered within 24–48 hours of the inspection.

Suitable For

Our Cavity Wall Surveys are ideal for:

  • Home Buyers

  • Homeowners

  • Landlords

  • Letting Agents

  • Property Investors

  • Housing Associations

  • Commercial Property Owners

Frequently Asked Questions

Can you inspect inside the cavity wall?

Yes. Where appropriate, we use a Teslong cavity inspection camera to inspect the cavity through a small access hole, allowing us to identify hidden defects such as damp insulation, bridging and debris.

Can you determine if cavity wall insulation has failed?

Yes. Our inspection can identify signs that cavity wall insulation has become damp, bridged or is no longer performing effectively.

Do you remove cavity wall insulation?

No. We provide independent inspections only and do not carry out insulation installation or removal. This ensures our advice remains impartial.

Will the survey identify the cause of damp?

In many cases, yes. We investigate the likely source of moisture and explain whether the issue is related to cavity wall defects, water ingress, condensation or another building defect.

Areas We Cover

We provide Cavity Wall Surveys throughout:

  • Cambridgeshire

  • Norfolk

  • Suffolk

  • Essex

  • Bedfordshire

  • Hertfordshire

  • Northamptonshire

  • East Anglia

Book a Cavity Wall Survey

If you're experiencing damp, water ingress or suspect problems within your cavity walls, Black Ridge Building Surveyscan provide an independent, professional assessment using modern diagnostic equipment to identify the underlying cause.

✓ Independent Surveyors
✓ No Remedial Work Sales
✓ Teslong Cavity Inspection Camera
✓ Moisture Diagnostics
✓ Thermal Imaging Available
✓ Drone Inspections
✓ Fully Insured
✓ Professional Digital Reports
✓ Fast 24–48 Hour Turnaround