Sherborne · TR19 Grease
We clean the full commercial duct run - grease, dry and laundry ductwork, canopy to roof fan - for kitchens, offices and industrial sites across Sherborne, and certify it to the TR19 Grease standard your insurer expects.
Sherborne
Sherborne rates dozens of food premises, and behind a large share sits an extract duct a canopy clean never reaches - plus the dry ductwork and air-handling that keep its offices and public buildings running.
The city's kitchens sit in tight, mixed stock - Cheap Street, Half Moon Street, Digby Road - with long concealed duct runs up to roof fans. We clean the full run to the TR19 Grease standard, canopy to fan, including the horizontal and vertical sections a canopy-only clean leaves coated.
It is not only kitchens: we also clean the dry supply and extract ductwork in Sherborne offices, schools and public buildings, and the lint-packed laundry runs behind its hotel and care-home dryers. The busiest kitchens - boarding-school refectories, care-home kitchens and busy Cheap Street restaurants - coat their hidden ducting in grease quickest, and that is the very path a fire follows.
The standard
TR19 Grease is the benchmark Sherborne insurers and fire risk assessors expect - measured across the whole extract run, not just the visible mouth of the canopy.
The standard is written in film thickness: once grease reaches a set depth the run has to be cleaned and proven again. In the crowded roof voids off Cheap Street and Digby Road, a wipe of the canopy and filters never reaches the ductwork behind them, where the grease that carries fire quietly gathers. We work the whole Sherborne run through hatches already in place and others we cut, bring it back to bright metal, note grease depths at fixed stations before and after, and certify to TR19 Grease with the closing figures logged.
By system
The fire risk. Fried-food extract coats duct walls in combustible grease; cleaned canopy to fan and certified to TR19 Grease.
Supply and general extract in offices and public buildings, carrying dust and debris that throttles airflow and loads the air-handling unit; cleaned to TR19.
The hidden one. Tumble-dryer ducting packs with lint - highly combustible - in Sherborne hotels, care homes and gyms.
On the ground in Sherborne
We are in Sherborne's ductwork and plant every week. The proof is the jobs, not the stock photos.
A high-street launderette in Sherborne had fabric fluff narrowing the flexible dryer ducting to a fraction of its bore, raising a clear fire risk. We stripped and vacuumed the full flexible run, cleared the discharge louvre and checked airflow. The fire risk was cleared and the laundry block felt cooler and drier, with the site left spotless and a short photo report for the compliance records.
When it is due
Ductwork rarely warns you politely. In a busy Sherborne kitchen these are the tells.
Smells pushing back into the dining room, a canopy that drips onto a Cheap Street cookline, extraction that no longer clears the steam, visible grease at the filter edges, or a Sherborne insurer or fire risk assessment asking for a TR19 certificate you cannot produce. Cleaning frequency tracks use - a hard-frying Half Moon Street kitchen needs it far more often than a daytime cafe - and your certificate states the interval, so the next clean is never a guess.
How it runs
Inspect the full Sherborne run, find the access gaps in the concealed sections, agree scope and frequency.
Fit inspection hatches where the run is sealed - common in the older Digby Road conversions - and protect the kitchen.
Canopy to roof fan, down to bare metal, with before-and-after grease-depth evidence.
TR19 Grease certificate, grease-depth record and next-due date for your Sherborne fire logbook.
Why it matters
Three duties push every Sherborne operator to keep ductwork clean, and they reinforce one another.
Fire safety law. Under the Regulatory Reform (Fire Safety) Order 2005, the responsible person for a Sherborne premises must assess and manage fire risk. A grease-laden duct is one of the most serious risks in any catering building, because a flare-up on a Cheap Street cookline can travel the ductwork and spread fire through concealed voids. The Health and Safety at Work etc. Act 1974 and the HSE reinforce the same duty of care.
Insurance. Your Sherborne insurer expects a current TR19 Grease certificate as proof the duct is clean. Without one, a fire claim can be cut back or turned down altogether - a costly thing to find only after a fire.
Hygiene and environmental health. When Dorset Council carries out a food hygiene inspection it judges the physical state of the premises, and ventilation is part of that. A grease-choked extract can pull down the rating an Environmental Health Officer gives, on top of the odour and the weakening airflow your staff put up with.
It is set by cooking hours under TR19 Grease - roughly every three months for heavy use of 12 to 16 hours a day, every six for moderate, every twelve for light. A hard-frying Cheap Street kitchen sits in a tighter band than a daytime Half Moon Street cafe. We measure the grease load and confirm your interval.
We fit compliant access panels where the ductwork has none, so every internal section can be reached, cleaned, inspected and certified - common in the older Digby Road conversions where the run was boxed in with no hatches.
The full run, canopy through the concealed horizontal and vertical ductwork to the roof fan - the hidden sections a canopy-only clean leaves loaded, which matters in the tight stock around Cheap Street and Digby Road where the runs are long and awkward.
Yes. We work overnight, early mornings and closing days for the Cheap Street and Half Moon Street kitchens, and around shift patterns at commercial and production sites, at no extra charge for out-of-hours work.
A dated TR19 certificate, before-and-after photographs of each section, and an access report for your fire logbook - the evidence a Cheap Street operator's insurer and fire risk assessor expect.
Yes. We clean the dry ductwork and air-handling in Sherborne offices, schools and public buildings, and the lint-heavy laundry ducts in the Dorset hotels and care homes, alongside kitchen grease ducts.
Yes. The fan at the top of a Digby Road or city-centre riser is where grease throws off the blades and the run ends - we degrease it and its housing, because a loaded fan is what finally stops a system pulling.
Local knowledge
Sherborne Old Castle was built in the 1120s by Roger, Bishop of Salisbury, and slighted in 1645 after a Civil War siege left it a ruin. Its walls still stand open to the weather, channelling wind and rain where masonry once sealed them. Modern buildings hide their airways in ductwork above the ceiling, and grease, dust and debris gather there unseen. We clean and prove extract and supply ductwork so air moves the way the drawings intended.
Phoenix Duct Clean · by the numbers
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