Darwen · 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 Darwen, and certify it to the TR19 Grease standard your insurer expects.
Darwen
Darwen rates hundreds 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.
Kitchens across Darwen work out of tight, mixed premises - Duckworth Street, Market Street, Hoddlesden - their extract snaking through concealed voids to roof-mounted fans. We take the whole run to the TR19 Grease standard, hood to fan, reaching the horizontal legs and vertical risers a canopy wipe never touches.
Kitchens are only half the work - we also strip the dry supply and extract ductwork of Darwen schools, offices and civic buildings, and the lint-choked dryer runs behind its hotels and care homes. It is the hardest-pressed kitchens - pub and hotel kitchens, factory and works canteens, takeaways and the busy town-centre cafes - that glaze their hidden ducting quickest, and that coating is the road a fire takes.
The standard
TR19 Grease is the benchmark Darwen insurers and fire risk assessors expect - measured across the whole extract run, not just the visible mouth of the canopy.
Grease is measured by thickness, and the standard sets the depth at which a system must be cleaned and re-tested. Around Duckworth Street and Hoddlesden, where the concealed runs thread through mixed roof voids, a canopy-and-filter wipe leaves the ductwork itself - the long hidden sections where grease accumulates and a fire travels - untouched. We access the full Darwen run through existing and newly fitted inspection hatches, clean to bare metal, record before-and-after grease-depth readings at set points, and issue a TR19 Grease certificate with a post-clean depth record.
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 Darwen hotels, care homes and gyms.
On the ground in Darwen
We are in Darwen's ductwork and plant every week. The proof is the jobs, not the stock photos.
A public toilet block in Darwen had the ceiling grilles in the staff toilets clogged with matted dust and pulling next to nothing. We took the intake grilles down for a wash, cleared the ducting and serviced the roof extract fan. Airflow came back up to standard and the staff toilets felt fresh again, with excellent feedback afterwards. The caretaker got a short photo report for their health-and-safety folder.
When it is due
Ductwork rarely warns you politely. In a busy Darwen kitchen these are the tells.
A canopy dripping onto a Duckworth Street cookline, cooking smells forced back to the tables, extraction that no longer clears the steam, grease showing at the filter edges, or a Darwen insurer or fire risk assessor wanting a TR19 certificate you have not got. How often it needs doing follows how hard you cook - a fast-frying Market Street kitchen far more than a daytime cafe - and the certificate names the interval, so the next visit is booked, not guessed.
How it runs
Inspect the full Darwen 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 Hoddlesden 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 Darwen fire logbook.
Why it matters
Three duties push every Darwen 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 Darwen 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 Duckworth 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 Darwen 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 Blackburn with Darwen Borough 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 Duckworth Street kitchen sits in a tighter band than a daytime Market Street cafe. We measure the grease load and confirm your interval.
A dated TR19 certificate, before-and-after photographs of each section, and an access report for your fire logbook - the evidence a Duckworth Street operator's insurer and fire risk assessor expect.
Yes. The fan at the top of a Hoddlesden 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.
Little, if it is planned. We survey the Darwen run first, agree a slot overnight or on a close day, sheet off the kitchen and clean section by section, so a Market Street cookline is back in service for the next shift.
Yes - from Duckworth Street and Market Street kitchens to the offices, schools and industrial units across Darwen and the wider Lancashire.
Yes. We clean the dry ductwork and air-handling in Darwen offices, schools and public buildings, and the lint-heavy laundry ducts in the Lancashire hotels and care homes, alongside kitchen grease ducts.
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 Duckworth Street and Hoddlesden where the runs are long and awkward.
Local knowledge
India Mill was built for the Shorrock family through the 1860s, its 303-foot chimney finished in 1868 to carry the smoke of a great cotton-spinning mill whose air once hung thick with lint. Modern premises hide their dust inside sealed ductwork instead, where grease and debris build unseen until airflow fails or fire finds a path. We clean and inspect ventilation and extract ductwork across the town, then hand over photographic before-and-after evidence of every run.
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