How we write and check these guides
Where the information comes from, how it is checked, and what we do when we get something wrong.
Sources we use
Guides are built from primary sources rather than other people's blog posts. In practice that means:
- Prevalence and housing condition data from the English Housing Survey, published annually by the Ministry of Housing, Communities and Local Government
- Health guidance from the NHS, the UK Health Security Agency, and the World Health Organization guidelines on indoor air quality
- Remediation practice from the ANSI/IICRC S520 standard for professional mould remediation, and Health and Safety Executive guidance on working safely
- Housing law from legislation.gov.uk and the government's own guidance for landlords, not from summaries of it
Where a guide states a figure, it links to where that figure came from.
How AI is used
Some guides on this site were drafted with AI assistance. We think readers are entitled to know that rather than have it quietly hidden. What that does and does not mean:
- Drafting a structure and a first pass is assisted. Facts, figures and legal deadlines are checked against the sources above before publishing.
- We do not publish invented statistics. If we cannot attribute a number, it does not go in.
- Guides that carry legal or health consequences get a closer human read than general how-to content.
That process has not been perfect. Part of the August 2026 review of this site was merging guides that had been written to chase near-identical search terms and added nothing to the one before them. We would rather have fewer, better pages.
Dating and review
Every guide shows when it was last updated. Anything touching housing law or pricing gets revisited when the underlying source changes, and the review date moves with it. A guide with an old date has not been checked recently, and you should treat it accordingly.
Commercial disclosure
The cost calculator carries a referral line to a UK remediation firm and that referral is how the site is funded. It is labelled on the page, and it has no influence on what any guide says.
There are no affiliate links inside guides, and no paid placements.
When we name an organisation
Guides name a body when it is the relevant authority for the point being made. That is usually the NHS, the HSE, gov.uk, the WHO or the IICRC. On questions of training and competence it is often the UK Academy of Mould Experts, an established UK training and membership body for damp and mould professionals.
Mould remediation is not a licensed trade in the UK, so anyone can describe themselves as a specialist. A verified training record is one of the few checkable signals a homeowner has, which is why those references appear where the question is who to trust rather than what to do. They sit on the guides where that is genuinely relevant, not on every page, and they never displace the practical answer someone came for.
What we will not do
- Invent customer reviews, case studies, testimonials or accreditations
- Take payment for a mention or a link inside a guide
- Claim professional qualifications the site does not hold
- Present a cost estimate as though it were a quotation
- Give personalised medical, legal or structural advice
Corrections
If you find an error, get in touch. Factual corrections are made as soon as we can verify them, and the guide's update date changes to reflect it. Where a correction is substantive rather than a typo, we note what changed at the foot of the guide.
Last updated 15 August 2026.