Mould Survey

Evidence-Led Diagnosis for Buyers, Homeowners & Property Managers

What Makes Our Approach Different

Our analysis is rooted in building pathology and understanding of property care, not product-led solutions.

We Investigate Thoroughly.

How moisture is generated internally

Why specific surfaces are reaching dew point

How it moves through air leakage and vapour diffusion

Whether the issue is lifestyle, ventilation, fabric defect or a combination

Where it accumulates

Comprehensive Mould Investigation

Unlike treatment-led companies, we do not sell mould removal, chemical sprays or ventilation units.
We provide an independent, evidence-based assessment of why mould is forming and what action is actually required.

External Assessment

Internal Assessment

Temperature and relative humidity readings
Dew point and surface condensation risk assessment
Ventilation assessment (extract rates and background ventilation)
Thermal imaging (where required) to identify cold bridges
Assessment of heating patterns and occupancy factors
Roof space ventilation review (if relevant)
Sub-floor ventilation review (where applicable)

Optional

You'll Receive.

Clear identification of mould risk areas

Explanation of the underlying moisture mechanism

Work with you to come up with remediation options (not default chemical treatments)

Guidance on ventilation, heating and fabric improvements

Written report suitable for buyer decision-making or landlord records

Common Causes of Mould

Mould growth requires:

Moisture
Suitable surface temperature
Organic substrate

We determine whether the issue is:

Surface condensation due to high indoor humidity
Cold bridging at lintels, reveals or junctions
Reduced air change following window upgrades
Solid wall properties with impermeable internal finishes
Sub-floor humidity migrating upward
External water ingress
Bridging of the damp proof course

Many properties labelled “rising damp” are in fact condensation or ventilation-related imbalance.

01 External Fabric Defects

Defective pointing, cracked render, porous brickwork, failed seals or poorly detailed extensions allowing moisture to penetrate the building envelope.

02 Rainwater & Plumbing Defects

Failing gutters, downpipes, flashing or concealed plumbing leaks that create sustained saturation in walls or timbers.

03 Internal Moisture Load & Thermal Imbalance

High indoor humidity combined with cold surfaces, thermal bridging, intermittent heating or retrofit changes that alter how the building breathes.

04 Inadequate Ventilation

Blocked air bricks, insufficient extraction, sealed chimneys or poorly ventilated roof spaces allowing humidity to accumulate instead of dispersing.

05 Damp Proof Course Bridging or Ground Level Issues

Raised external ground levels, internal floor build-ups, or render bridging that bypass the original damp proof course.

When You Should Book a Mould Survey

Pre-Purchase (Before Exchange)

Homeowner

Case Studies

Recent damp & timber investigations

Victorian Flat

Penetrating damp incorrectly labelled as rising damp → cause was defective pointing.

Semi-detached

Poor subfloor ventilation, blocked gutters, poorly insulation roof, and severe condensation behind fitted wardrobe

Converted flat

Wet rot in timber joist caused by retrofitted concrete floor and poor subfloor ventilation

Need a Clear Diagnosis for Mould Issues?

Independent, PCA-registered surveyors. Fixed pricing.

Fill in the form below or call us at 020 8050 2537