Condensation Control in Cardiff — Verified Specialists

Contractors covering Cardiff who diagnose why a property has condensation mould and fix the cause — ventilation, heating and insulation — not just wipe the wall.

Quick answer

9 verified condensation and ventilation specialists cover Cardiff on MouldPros. They diagnose the cause of condensation mould — moisture load, ventilation, heating and cold surfaces — and install PIV, MVHR, extraction and humidity control. Every listing is manually reviewed; contact contractors directly, no commission.

Already have mould on the wall in Cardiff? The growth is the symptom; condensation is usually the cause. Deal with both. See mould removal specialists in Cardiff →

Condensation & Ventilation Specialists Covering Cardiff

Search all →

Also covering Cardiff

The Mould Company

Brighouse, yorkshire · HD6 1NA

At The Mould Company, we are committed to delivering a highly efficient, end-to-end service you can rely on. Every client is supported by a dedicated customer service team assigned to their specific area or council, ensuring clear communication and regular updates throughout the entire process. With years of experience in property maintenance and specialist cleaning, we understand the importance of a thorough property inspection. That’s why we’ve developed our own in-house inspection reports, which can be tailored to meet your specific needs and requirements. Our innovative mould treatment methods are designed not only to eliminate mould effectively but also to protect your property from future issues—offering long-term peace of mind and healthier living environments.

✓ Insured✓ Awaab's Law
View profile →

📍 Covers Cardiff (based in Brighouse)

The Veteran Survey Company (Trading name of The Veteran Building Company Ltd

Bridgend, wales · Cf329bz

The Veteran Survey Company is a specialist building surveying practice providing professional damp, mould, condensation and building pathology investigations across South Wales, including Bridgend, Cardiff, Swansea, Newport, the Vale of Glamorgan, Bristol and surrounding areas. Our approach is diagnosis-led. Rather than simply treating visible mould or recommending generic damp-proofing solutions, we investigate the underlying building defect or environmental condition responsible for the problem. Our surveys can investigate: • Damp and mould growth • Condensation and high internal humidity • Penetrating damp and water ingress • Suspected rising damp • Defective rainwater goods, roofing and external fabric • Thermal bridging and cold surfaces • Inadequate ventilation and extraction • Plumbing and drainage-related moisture • Timber moisture and associated deterioration • Insulation and building-fabric defects Investigations may incorporate calibrated moisture measurement, thermal imaging, humidity and environmental assessment, visual building pathology inspection and, where appropriate, inspection of roofs and other difficult-to-access areas. The Veteran Survey Company is RPSA accredited and PCA qualified, with specialist training and qualifications in damp investigation and building pathology above this. Our surveys are undertaken by qualified building surveyors with clear written reports explaining the probable cause of the problem, supporting evidence and practical recommendations for remediation. We work with homeowners, landlords, letting agents, property managers, housing providers and commercial clients. Where remedial work is subsequently required, we also have access to experienced in-house building, roofing and property-maintenance expertise. This means recommendations can be assessed for their practicality while keeping the initial investigation focused on identifying the cause rather than simply selling a treatment. Our objective is straightforward: diagnose the building properly, explain why the problem is occurring and provide proportionate recommendations that address the cause rather than just the symptoms.

✓ CSRT✓ Insured✓ Awaab's Law
View profile →

📍 Covers Cardiff (based in Bridgend)

Why Cardiff’s Housing Gets Condensation

Cardiff has significant concentrations of Victorian and Edwardian terraced housing, particularly in inner suburbs such as Cathays and Grangetown, alongside a large student rental market.

High-density student HMOs in older terraces bring overcrowding-related condensation into focus alongside the fabric damp typical of solid-walled Victorian construction. The Public Services Ombudsman for Wales has upheld findings of significant failings by Cardiff Council in how it responded to some damp and mould complaints. Older, solid-walled and poorly-insulated stock like this runs cold surfaces through the winter, and where windows have been replaced without trickle vents the background ventilation that used to carry moisture away has often been lost — the two conditions that produce condensation mould.

The fix in Cardiff is the same as anywhere: raise surface temperatures with insulation, remove moisture at source with working extract, and add whole-house ventilation (PIV, or MVHR in a suitable property) where rooms still suffer. Compare the options →

Condensation, excess cold and Awaab’s Law in Cardiff

Phase 1 — in force for social housing since 27 October 2025 — significant damp and mould must be investigated within 10 working days and made safe within 5 working days of the investigation concluding. Phase 2 — comes into force for social housing on 30 November 2026, adding excess cold — usually the same defect that causes the condensation mould in a cold Cardiff home.

Condensation Control Near Cardiff

Condensation Control in Cardiff — FAQs

Who installs PIV and ventilation for condensation in Cardiff?
MouldPros lists 9 verified condensation and ventilation specialists covering Cardiff. They fit positive input ventilation (PIV), continuous extract fans, trickle vents and, for suitable properties, MVHR — and diagnose which of these a property actually needs before quoting.
How much does condensation control cost in Cardiff?
A PIV unit is typically £400–£800 installed and is the most cost-effective whole-home fix for a house with loft access. Whole-house MVHR is £3,000–£8,000 and suits new build or major refurbishment. An independent condensation or damp survey costs £200–£400 and is worth it where the cause is unclear.
Is condensation mould the landlord's responsibility in Cardiff?
Yes. In force for social housing in England since 27 October 2025, and significant damp and mould must be investigated within 10 working days and made safe within 5 working days of the investigation concluding. Phase 2 — comes into force for social housing on 30 November 2026, adding excess cold. GOV.UK is explicit that the cause is the building, not the tenant's lifestyle.
Condensation or rising damp in my Cardiff property?
Condensation forms on cold surfaces and worsens in winter, usually with no tide mark or salt staining. Cardiff has significant concentrations of Victorian and Edwardian terraced housing, particularly in inner suburbs such as Cathays and Grangetown, alongside a large student rental market. A survey is the reliable way to tell condensation, rising damp and penetrating damp apart, because the fix for each is completely different.

Guides