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01 · Ask
Repaint or full coating system?
Refresh existing paint, or apply a 15-year coating? Describe the house and the AI tells you which suits the substrate.
Apply anti-mould coating.
Stain-blocking and anti-mould coating — for damp-prone bathrooms, kitchens and basements.
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Hire a weather-coating applicator. Primer, topcoat, dry weather.
Read the brief on substrates, breathability and weather conditions — then let Three local applicators quote.
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02 · Read the brief
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Silicone vs acrylic, breathability ratings, primer requirements, weather windows, BBA-certified systems. Know what 'guaranteed' means.
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03 · Compare
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Three local applicators quote on the same spec — coating system, prep, scaffold, guarantee — so you compare cleanly.
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Top tips
Hiring a weather coatings, without the regret.
Four moves that separate a smooth job from a nightmare.
Test the substrate first.
Cement render, pebbledash, brick — different surfaces need different coatings. A proper applicator tests adhesion before quoting.
Insist on a primer + topcoat system.
Skipping the primer halves the lifespan. A coating system (primer + 2-coat topcoat) lasts 15+ years; topcoat-only fails in 5–7.
Don't apply in wrong weather.
Most coatings need >5°C and dry for 24 hours either side. Applicators who push on in November or April are setting up failure.
Check the breathability rating.
Solid walls need breathable coatings (vapour-permeable) — silicone-based, not acrylic. Sealing solid walls traps damp.
Costs & timeline
Know what it costs. Know when it ends.
Indicative UK ranges and what affects price.
Cost range
By job type
Inc. VAT · 2026
Source: NMT quotes
Source: NMT quotes
Masonry paint repaint (per m²)
£18–£40/m²
Silicone weather coating (per m²)
£35–£70/m²
Pebbledash repaint (per m²)
£25–£50/m²
Whole-house weather coatingSemi-detached
£3.5k–£9k
Render repair + coating
£4k–£12k
Scaffold hire (3 weeks)
£800–£2k
!
Quote spread is typically ± 18% — always get 3 quotes.
At a glance
Infographic · VideoThe Weather Coatings briefing.
Infographic
Weather Coatings quick-view
Video guide
Weather Coatings explained
Anti-mould and stain-blocking coatings — treat damp-prone areas. Bathroom, ceiling, basement. Expect to pay £200–£1,500 for UK anti-mould coating treatment.
What Does the Work Involve?
Decorator or damp specialist. Mould cleaned with fungicidal wash. Stain-block applied (Zinsser, Polycell). Anti-mould top coat (Dulux Endurance+, Crown Mouldproof). Ventilation advised.
Typical Costs
| Item | Low (£) | High (£) | Notes |
|---|---|---|---|
| Single ceiling treatment | 100 | 400 | Per ceiling |
| Bathroom full anti-mould | 200 | 800 | Walls + ceiling |
| Whole house anti-mould | 500 | 1,500 | Persistent issues |
| Mould wash + paint per m² | 15 | 40 | Standard |
| Premium fungicidal paint per litre | 30 | 80 | Material only |
| Stain-block primer | 50 | 200 | Per room |
| Extractor fan install | 200 | 600 | Plus paint |
UK Regulations
Building Regs Part F (ventilation) — root cause. Awaab's Law for social rental damp/mould response.
Frequently Asked Questions
Treat cause or symptom?
Both — paint treats symptom. Ventilation/insulation fixes cause.
Best anti-mould paint?
Dulux Endurance+ Mouldproof, Crown Mouldproof. Premium £25-£40/litre.
How long does it last?
3-7 years if root cause unfixed. Permanent if ventilation good.
Extractor fan worth it?
Bathroom/kitchen yes. £200-£600 prevents thousand-pound damage.
DIY effective?
Yes — mould wash + anti-mould paint. £50-£150 DIY.
Landlord legal duty?
Yes — Awaab's Law for social, Homes (Fitness for Human Habitation) for private. 24-hour response damp/mould.
This guide was written with AI assistance and is intended for general information only. Prices are estimates based on UK averages and may vary by region. Always get at least three quotes and consult a qualified professional before starting any work.
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