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01 · Ask
Open fire, wood-burner or multi-fuel?
Different chimneys, different frequencies. Describe what you've got and the AI tells you what to ask for.
A guide to chimney fire safety.
What HETAS, Approved Document J and BS EN 15287 actually require — and how to keep on the right side of insurance.
✓ Updated May 2026✓ Free quotes✓ Vetted pros
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02 · Read the brief
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NACS vs APICS vs HETAS, sweeping frequency, CCTV diagnosis, insurance certs. Know what's covered.
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03 · Compare
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Three local sweeps quote on the same appliance — sweep, inspection, cert — so you're protected.
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Top tips
Hiring a chimney sweep, without the regret.
Four moves that separate a smooth job from a nightmare.
Get the certificate — your insurer needs it.
A NACS or APICS certificate is what insurers want to see after a chimney fire. Don't accept 'cleared' verbally — get the paperwork.
Sweep at the right frequency.
Smokeless solid fuel: once a year. Wood: twice. Open coal fire: quarterly. Skip these and you risk fire and prosecution under DCLG rules.
CCTV inspection on first visit.
An unfamiliar chimney should be CCTV-inspected to spot cracks, missing pots, bird nests. £30 extra; saves £3k repointing surprises.
HETAS-approved for wood/multi-fuel.
If you've a wood-burner or multi-fuel stove, the sweep should be HETAS-registered. Other certs aren't enough for solid-fuel appliances.
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
Single sweep (open fire)
£60–£100
Sweep + CCTV inspection
£100–£180
Wood-burner / multi-fuel sweep
£70–£130
Multi-flue (2+ chimneys)
£150–£280
Bird's nest removal
£100–£250
Cowl install (anti-bird, anti-rain)
£120–£350
!
Quote spread is typically ± 18% — always get 3 quotes.
At a glance
Infographic · VideoThe Chimney Sweep briefing.
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Chimney Sweep explained
Chimney fires are serious safety risks. Annual sweeping prevents tar build-up. UK insurance often requires sweep certificates. Prevention much cheaper than fire damage.
What Does the Work Involve?
Annual chimney sweep. Inspection for tar (creosote) build-up. CCTV inspection every 5 years. Burn only seasoned dry wood (under 20% moisture). DEFRA-approved fuel. Adequate ventilation. CO alarm installed.
Typical Costs and Prevention
| Item | Low (£) | High (£) | Notes |
|---|---|---|---|
| Annual chimney sweep | 60 | 150 | Standard |
| CCTV inspection 5-yearly | 100 | 300 | Internal check |
| Quality firewood per m³ | 140 | 250 | Kiln-dried hardwood |
| Cheap unseasoned wood | 50 | 100 | Risk tar build-up |
| CO alarm (mandatory) | 20 | 100 | Sealed long-life |
| Spark arrestor cowl | 50 | 200 | Recommended |
| Annual prevention cost | 200 | 500 | Total annual |
How to Prevent Fires
- Annual sweep: Removes tar and creosote build-up.
- Quality fuel: Seasoned wood (under 20% moisture). Kiln-dried hardwood.
- Hot fires not smoulder: Quick hot burns produce less tar than smouldering.
- Avoid wet/green wood: Produces tar that catches fire.
- Smoke control area DEFRA-approved fuel: Mandatory in cities.
UK Regulations
Smoke and CO Alarm Regulations 2022 mandatory. Insurance often requires annual sweep certificate. Smoke Control Areas: DEFRA-approved fuel only.
Common Mistakes
- Smouldering for "longer burn": Tar build-up risk. Hot fires better.
- Burning wet wood: Wet wood produces tar. Major fire risk.
- Skipping annual sweep: Tar accumulates. Eventually catches fire.
- No CO alarm: Illegal since 2022. Health risk.
Frequently Asked Questions
How likely is chimney fire?
Annual UK: thousands of chimney fires. Prevention through sweeping and fuel choice.
Signs of chimney fire?
Loud crackling, dense smoke, vibration through floor, smoke entering room. Immediate emergency.
What to do if fire occurs?
Call 999. Close stove damper. Don't pour water. Evacuate. Fire brigade.
Insurance after chimney fire?
Without annual sweep certificate: claim may be refused. Sweep + CCTV essential.
Quality wood essential?
Yes — under 20% moisture. Seasoned 2+ years. Wet/green wood is dangerous and inefficient.
Best prevention?
Annual NACS sweep. Quality seasoned wood. Hot fires not smouldering. CO alarm.
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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