Chimney Sweep & Wood Burner FAQs

I'm based in Woking and cover a wide circle around the town, including:

• Woking
• Guildford
• Godalming
• Weybridge
• Cobham
• Camberley
• Farnborough
• Staines

If you're in or around any of these Surrey and North Hampshire towns, I can almost certainly help — and I regularly travel to villages in between. Not sure if I cover your postcode? Just ask.

• Fire safety — soot, creosote and tar build up over time and are highly flammable, so may potentially cause chimney fires. Removing these deposits by effective sweeping will therefore reduce that risk.
• Carbon monoxide protection — a blocked or dirty chimney can stop gases venting properly.
• Better efficiency — a clean chimney draws air correctly, helping your appliance burn hotter and use less fuel.
• Blockage removal — birds' nests, leaves and debris are common and need clearing.
• Insurance compliance — many insurers require proof of regular sweeping, especially for wood burning stoves.

It's mainly determined by the fuel you burn, the type of appliance you have, how often you use it, and your insurance policy requirements. As a general guide:

• Burning wood on a regular basis — every 3 months.
• House or bituminous coal — at least twice a year.
• Smokeless fuels, or gas/oil appliances — once a year is sufficient.
• Newly moved into a property, or unsure of history — book a sweep before you light up, regardless of season.

These are starting points rather than fixed rules — actual usage and condition matter just as much. For example, a client burning well-seasoned wood (10 to 20% moisture) in a wood burning stove, operating the air controls effectively, using it only at weekends from November to February, with minimal soot build-up on inspection and an insurance policy that simply requires the chimney to be "properly maintained," could reasonably get by with just one sweep a year. On the other hand, if you're burning wood regularly right through the winter, more frequent sweeping may be recommended depending on how hard the appliance is worked.

Regular sweeping removes soot and creosote, improves airflow, and reduces the risk of chimney fires — helping your appliance burn more efficiently and safely throughout the heating season. Always check your own insurance policy too, as some insurers set their own minimum sweeping frequency.

Many towns, including for example parts of Guildford, are designated Smoke Control Areas, with specific rules on what you're allowed to burn. Breaking the rules can result in a council fine. Your local council can confirm whether your property falls inside one, and you can also check using the Defra postcode lookup at smokecontrol.defra.gov.uk.

No — only smokeless coal or anthracite can be burned on an open fire in a Smoke Control Area, unless an exempt appliance is being used. Small amounts of dry wood kindling to start the fire are fine, but not logs as the main fuel.

A Defra exempt stove is approved for use in Smoke Control Areas, meaning it can legally burn wood even inside one. Most modern Ecodesign stoves meet this standard — check your own model at smokecontrol.defra.gov.uk.

1. Check whether your stove is Defra exempt, if you're in a Smoke Control Area.
2. Book a certified chimney sweep straight away, especially if you don't know when it was last cleaned.
3. Ask for personalised advice during the sweep — I'll assess your stove, chimney and fuel setup.

Wood needs to be below 20% moisture — the "Ready to Burn" standard. Wet wood burns poorly, produces excess smoke, creates soot and tar inside the chimney, and increases the risk of chimney fires. A simple moisture meter is the best way to check your logs. The sweet spot for moisture content is between 10% and 20%.

Use a well-ventilated log store that keeps rain off. Good airflow matters more than warmth — stacking logs properly helps them dry faster and prevents mould. Avoid bringing wet logs indoors to "dry out"; it doesn't work.

• Moisture meter — confirms your logs are properly dry.
• Stove pipe thermometer — helps find and hold the ideal burn temperature.
• Stove fan — pushes heat further into the room.

I'm happy to advise which suit your stove during your sweep.

• Use plenty of kindling and a dry firelighter.
• Open all air controls fully.
• Try the top-down lighting method for a cleaner start. The top-down method is a technique for starting fires in wood burners or fireplaces where you stack large logs at the bottom, smaller wood and kindling in the middle, and firelighters with tinder at the very top, igniting the fuel to burn downward.
• Burn at full air for at least 10 minutes.
• Use a stove thermometer to find your stove's ideal temperature.
• Avoid closing the air controls too early — smouldering causes pollution and tar build-up.

• Smoke still coming from the chimney well after lighting up
• Dirty or blackened stove glass
• Heavy soot or tar found during a sweep

If I spot any of these during your appointment, I'll explain what's causing it and how to fix it.

Burning dry wood in a modern stove is one of the lowest-carbon heating options available. UK air quality has improved dramatically since the 1970s, and good technique makes a real difference on top of that — less smoke, less pollution, more heat for the same wood.

During a sweep, I don't just clean your chimney — I also inspect your stove and flue, review your fuel, and check what's coming out of your chimney, so I can give tailored advice on log size, refuelling intervals and air control.

General tips:

• Burn only dry wood
• Don't slumber the stove overnight
• Avoid painted or treated wood
• Use logs 4 to 6 inches thick
• Keep a CO alarm in the room

The Burnright campaign (burnright.co.uk) has excellent videos and guides on clean, efficient burning. As your local Guild of Master Chimney Sweeps certified sweep, I'm always happy to give personalised advice during your appointment.