Mould and damp: your questions answered

Frequently asked questions about mould and damp

Is mould in my home a health risk?

Household mould, including black mould, can affect respiratory health — particularly for children, older people, and anyone with asthma or a weakened immune system. Occasional light surface mould in a bathroom is common and usually low-risk once cleaned, but persistent or spreading mould, or mould affecting a bedroom or living area, is worth having assessed rather than just wiped away repeatedly.Source: UKHSA / GOV.UK ↗

How common is damp in rented homes?

The English Housing Survey 2023–24 found that 9% of private rented dwellings in England have damp — around three times the rate in owner-occupied homes.Source: English Housing Survey 2023–24 ↗

Can I remove mould myself, or do I need a professional?

Small, isolated patches of surface mould on non-porous surfaces (tiles, glass, painted wood) can often be cleaned yourself with appropriate gloves, ventilation, and a mould-specific product. Mould covering a large area, mould that keeps returning after cleaning, or mould linked to a leak, damp patch, or condensation problem needs a professional inspection — treating the surface without fixing the underlying moisture source means it will come back.

What causes mould in a home I own, and is it something I've done wrong?

Mould needs moisture to grow, which in owned homes usually comes from condensation (cooking, showers, or drying laundry indoors without ventilation), a leak, rising damp in older properties, or penetrating damp through the building fabric. It's rarely about cleanliness — even well-kept homes get mould if ventilation or a building defect lets moisture build up. A specialist survey identifies the actual cause rather than guessing.

Is it condensation or damp?

Condensation mould — caused by moisture in the air (cooking, showers, drying laundry indoors) meeting a cold surface — is the most common issue in UK homes and the one most easily mistaken for "damp". Rising damp shows as a tide mark low on walls; penetrating damp as wet patches that follow rain. A professional survey is the reliable way to tell them apart, since the fix for each is different.Why condensation forms →

How much does mould removal cost?

Costs vary with the extent of growth and the treatment required. Surface mould treatment in a single room typically costs £150–£400. Extensive remediation involving plaster removal and replacement can cost £800–£3,000+. An independent damp survey (£200–£400) is the recommended starting point to get an accurate scope of works before committing to a price.Mould removal costs in full →

Will home insurance cover mould damage?

Usually only if the mould results from a sudden, insured event — such as a burst pipe or storm damage — reported promptly. Most standard home insurance policies exclude mould caused by gradual issues like long-term condensation, rising damp, or lack of maintenance, since insurers treat these as preventable. Check your policy wording and speak to your insurer before assuming cover applies.

How do I stop mould coming back after treatment?

Address the moisture source first — improve ventilation (extractor fans, trickle vents, opening windows after showers or cooking), fix any leaks or damp ingress, and avoid drying laundry on radiators in unventilated rooms. A specialist can advise on longer-term fixes such as positive input ventilation (PIV) systems or damp-proofing where the cause is structural rather than behavioural.Compare ventilation fixes →

Does Awaab's Law apply to landlords?

In force for social housing in England since 27 October 2025. For private landlords, the extension is a later phase of the Renters' Rights Act 2025 rollout — extension to private landlords legislated under the renters' rights act 2025 — commencement date subject to consultation, not yet confirmed. Once in force, it will require investigating significant hazards within 10 working days (24 hours for emergencies) and completing safety works within 5 working days of the investigation concluding. Awaab's Law is England-only legislation. Private and social rented homes in Scotland are instead covered by the Repairing Standard (Housing (Scotland) Act 2006), which already requires landlords to keep a home free from damp and mould that poses a significant health risk — strengthened from March 2026 by new statutory investigation and repair timescale regulations. Rented homes in Wales are covered by the Renting Homes (Wales) Act 2016, which makes fitness for human habitation — including freedom from damp and mould — an implied term of every occupation contract under the Renting Homes (Fitness for Human Habitation) (Wales) Regulations 2022; a new Welsh Housing Quality Standard rule from April 2026 adds specific timescales for investigating and remedying hazards like damp and mould.The full Awaab's Law guide →

Can a specialist provide a written report for Awaab's Law compliance?

Yes. Many MouldPros-listed specialists provide written inspection reports suitable for evidencing compliance. Look for contractors with PCA accreditation or RICS qualifications, and confirm the written report format before booking.

How do I find a qualified mould specialist?

Search the MouldPros directory — all listed specialists are manually verified before their listing goes live. Filter by service type (mould removal, damp survey, damp proofing, condensation control and ventilation) to find the right contractor, or ask for up to three free quotes in one request.Get free quotes →

How quickly can a mould specialist respond?

Response times vary by contractor and current workload. Many MouldPros-listed specialists can arrange an initial assessment within 3–7 days; several offer priority appointments for landlords working to a compliance deadline. Confirm turnaround directly with the contractor when you enquire.