The short answer
At least once a year, before the first fire of the season. If you burn wood most evenings through the winter, add a second sweep in the middle of the season. Pellet stoves need an annual service plus the regular cleaning in the manual. In Malta, book in September or October, because sweeps get busy from October to January.
The short answer
For most homes in Malta and Gozo, sweep the chimney at least once a year, before the first fire of the season. That applies to open fireplaces, wood-burning stoves and the flues of pellet stoves.
Two situations call for more:
- You burn wood most evenings through the winter. Add a second sweep in the middle of the season.
- You burn wet or unseasoned wood, or often run the fire slowly with the air turned down. Both build up soot and creosote faster. The better fix is drier wood and hotter fires, but until then, sweep more often.
Why once a year matters
Every wood fire leaves soot and a tar-like deposit called creosote on the inside of the chimney. Over a season, it builds up and causes three problems:
- Fire risk. Creosote is flammable and is the main cause of chimney fires.
- Poor draw. A narrower flue draws less well, so the fire is harder to light and smoke can come back into the room.
- Carbon monoxide. A partly blocked flue increases the risk of fumes coming back into the home.
Our guide to what creosote is and why it is dangerous explains the stages it goes through.
How your fire or stove changes the schedule
Open fireplace
At least once a year. Open fires produce a lot of smoke relative to the heat they give, and the large opening means more debris and soot in the chimney.
Wood-burning stove
At least once a year, and twice for heavy use. Stoves are more efficient than open fires, but when they are run slowly with the air turned down, they can build up creosote quickly in the flue.
Pellet stove
The flue needs sweeping at least once a year as part of a full service, which also cleans the burn pot, heat exchanger and exhaust fan. Between services, follow the manual for emptying the burn pot and ash pan, often every few days in heavy use. Our pellet stove cleaning guide covers what you can do yourself and what needs a service, and why a pellet stove won’t light covers the most common fault.
Malta’s season and when to book
Malta’s heating season is short, but heavy. Most homes light fires from around November to February or March, with the coldest evenings in January and February. Two things follow from that:
- Book early. Sweeps are busiest from October to January. Booking in September or October means the chimney is ready before the first cold evening, and you are not waiting for a slot when you need the fire most.
- Plan a mid-season check if you burn most evenings. January is a good time for a second sweep, before the coldest weeks.
Our seasonal home maintenance calendar fits the sweep in with the rest of the year’s jobs.
Holiday homes and farmhouses in Gozo that are used only occasionally still need sweeping before the first fire of each season, even if the fire was lit only a handful of times the year before.
The summer gap: nests and damp
A chimney that sits unused from spring to autumn is open to two problems:
- Birds. An unused chimney is a sheltered place to nest. Twigs and nesting material can block the flue completely. Never light a fire to burn a nest out, because it can start a chimney fire.
- Damp. A chimney closed all summer can be damp, especially in older stone buildings, which makes the first fires smoky.
A sweep before the season clears both. A chimney cowl or cap, fitted by a professional, stops birds getting in.
Wood makes a big difference
What you burn changes how fast the chimney gets dirty:
- Burn seasoned wood with a moisture content below 20%. A simple moisture meter tells you if it is dry enough.
- Store it off the ground, covered on top and open at the sides, out of the winter rain.
- Never burn painted, varnished or treated wood, chemically treated pallets, chipboard or rubbish.
- Light a brisk fire first to warm the flue, then settle it.
Our guide to the best firewood for a wood burner covers choosing and storing logs.
Signs your chimney is overdue
Book a sweep before using the fire again if you notice any of these:
- Smoke coming into the room, or the fire is hard to light and keep going.
- A strong smoky or tar-like smell, especially when the fire is out.
- Black, flaky or oily deposits around the fireplace opening or stove door.
- Twigs, debris or soot falling into the grate.
- Stove glass blackening quickly after cleaning.
Smoke in the room is the one never to ignore (see why a fireplace smokes into the room), because it means fumes are not leaving the home properly. Open a window, let the fire die down, and do not use it again until the chimney has been checked.
What a sweep does
A sweep brushes the flue from bottom to top, removes soot and creosote, and clears the firebox, smoke chamber and ledges where debris collects. They also check for nests, blockages and visible damage, and tell you if anything needs attention from a specialist, such as a cracked flue or a missing cowl.
Before the visit, let the fire go out and the fireplace cool completely, ideally for a full day, and clear the area in front of the fireplace.
Keeping safe between sweeps
- Fit a carbon monoxide alarm in the room with the fire or stove, and test it regularly.
- Clear ash regularly, following your stove manual.
- Keep a fireguard in front of open fires.
Our guide to chimney and stove safety before winter has the full pre-season checklist.
Book your sweep
clear.mt arranges chimney sweeping for open fires, wood burners and pellet stoves across Malta and Gozo, including farmhouses and holiday homes in Gozo. Tell us what you have and your preferred month, and we will confirm a date before the busy season.