Non-Invasive Surveys

The first step to understanding damp or mould — safe, simple, and completely independent.

A Non-Invasive Survey is the quickest, clearest way to understand what’s really happening inside your property without drilling, opening walls or causing any disruption. Whether you’re a homeowner noticing early signs of mould, a landlord receiving tenant complaints, or a housing provider needing fast, evidence-led assessment, this survey gives you the clarity you need to make informed decisions.

At JAG, our surveys are fully independent, meaning every finding and recommendation is based on evidence, not upselling. You’re free to use any contractor you choose, and you’ll still have a complete schedule of works to follow.

A Non-Invasive Survey is ideal if:

You’ve noticed mould or damp but don’t know what’s causing it
Tenants are reporting issues and you need clarity before instructing work
You want a fast assessment before buying or selling a property
You’re unsure of the cause is condensation, leaks, cold spots or poor ventilation
You want clear, unbiased guidance before committing to any repairs

This survey is perfect for flats, houses, student lets, HMOs, care homes and social housing properties.

Thermal imaging to detect hidden cold spots or moisture patterns

Moisture readings across walls, floors and ceilings

Relative humidity and dew point readings

Ventilation assessment (including extractors, trickle vents and airflow behaviour)

Visual inspection of the building fabric

A home-use assessment to identify everyday factors that may be contributing to damp and mould.

Review of heating, insulation and property layout

Fast Answers

No waiting for intrusive work or follow-up visits.

No damage to the property

We diagnose using external readings and visual evidence only.

Evidence you can rely on

Independent, unbiased findings backed by technology.

Prevention of unnecessary spend

You understand the problem before committing to repairs.

A clear plan

Your report outlines what to do next and in what order.

1. Book your survey

Choose a time that suits you or, alternatively, let us arrange access directly with your tenant.

2. Surveyor visit

A friendly, respectful surveyor examines the affected areas and the wider environment to uncover patterns and possible causes.

3. Diagnostic assessment

Using moisture meters, thermal cameras and humidity tools, we map out what’s happening and why.

4. Your report (within 72 hours)

You receive a clear, plain-English report with photos, findings and recommended actions.

5. Optional next steps

If needed, we can provide safe mould removal, root-cause repairs or PRV testing — but there is no obligation to use us for further work.

FAQs

Typically 1 to 3 hours, depending on the size of the property and the areas being surveyed. Please note this is not a full property survey.

Ideally yes, but we can still provide strong findings if some areas are restricted.

In most cases, yes. If hidden leaks or structural issues are suspected, we will explain why and discuss the option of an Invasive Survey.

Yes. Everything is explained in plain English with photos to support the findings.

What Our Clients Say

Don't just take our word for it - hear from homeowners, housing associations, and property managers we've helped.

"Excellent service from start to finish. The surveyor was thorough and explained everything clearly. The mould treatment has completely resolved our issues and the team were professional throughout."

Sarah Johnson

Homeowner, London

"We've worked with JAG on multiple social housing properties. Their reports are detailed, their pricing is fair, and their work is always to a high standard. Highly recommended."

Mark Thompson

Housing Manager

"Quick response, competitive pricing, and excellent workmanship. The damp issue in my rental property was sorted efficiently with minimal disruption to my tenants."

Emma Williams

Private Landlord, Manchester