Greater London · TR19 inspections and grease testing
TR19 inspections and grease testing in Blackfen, Greater London
Professional TR19 inspection in and around Blackfen, booked around your opening hours and finished with a written report and photos.
- Systems cleaned on a calendar with no measurements
- Post-clean verification after another contractor’s clean
- Systems that need surveying before cleaning
What the work involves, part by part
Schools, hospitals and care homes
We fit testing around service times and school holidays so meals are not affected.
Extract fan and discharge
A greasy fan works harder and wears faster. Readings show if it needs attention before the next clean.
How we handle TR19 inspection in Blackfen
Grease thickness testing tells you how much grease is sitting in the canopy, ducts and fan. We use the Wet Film Thickness Test (WFTT) or the Deposit Thickness Test (DTT), taking readings at set points. From the numbers, you can see whether cleaning is due. If you’re dealing with confirming a clean reached the whole system and parts of the system left out of past cleans, we can help, from deposit thickness tests, insurer audits and access surveys onwards.
In a London area like Blackfen, a kitchen extract often passes through shared space on its way out: a riser, a service void, the floors above. Grease in a duct like that is a fire risk to the whole building, not just the kitchen, so a regular TR19® clean protects everyone in it.
Our accreditations include CHAS, SafeContractor and ISO 9001, and we are fully insured. We’re also a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, trading since 2009.
- Place
- Blackfen (DA15, DA16, SE9)
- Wider area
- Greater London
- Reporting
- Certificate and photo report
- Quote
- A fixed price before work begins
- When we work
- After hours by arrangement; emergencies any time
- Telephone
- 0345 646 2711
- Last updated
- 30 October 2026
What we do, step by step
Before we leave, we walk the area with whoever is on site. We point out anything that couldn’t be reached or needs a follow-up, and it goes on the report too. The visit takes an hour or two for a single kitchen, longer for a large or complex system. A name and number for whoever controls access to the building in Blackfen saves time on the night.
- Post-clean verification is booked once the clean is done.
- The same access points are opened up.
- We repeat the WFTT or DTT readings.
- Photos are taken to show the condition after the clean.
- The results are reported, with anything missed flagged.
Before we arrive
- Allow time for equipment near the work to be turned off and cool down
- Name a contact who can let us in at the agreed time
- Tell us the best time to work, such as after service or at a weekend
Get a fixed quote
Photos are enough for some jobs, while others need a look on site. Larger sites, and anything hidden behind walls, ceilings or floors, are normally surveyed first. Either way, the quote is fixed before any work is booked.
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Landlords, agents and facilities managers
For anyone managing more than one site, we can schedule visits across all of them on one quote. Every building has its own written report, so records stay tidy.
We also work for facilities teams across offices, schools and healthcare in Blackfen and across Greater London. Larger estates can be phased building by building to keep disruption down.
Places near Blackfen
What else we do in Blackfen
Looking after it afterwards
Aftercare is simple, and it helps at the next visit:
- Keep grease filters clean and fitted properly
- Diary the next grease test and clean
- Share inspection reports with your insurer or broker when asked
- Keep the route to access panels clear
You get a report with the grease readings, where they were taken and pictures of each point. File it alongside your TR19 certificates.
Keep filters clean and in place. Gaps around filters let grease get past them.
When something else is needed
We’ll always give you a straight diagnosis, so here’s what this work can’t put right:
- Installation problems, which fall under design guidance such as DW172
- Heavy deposits found on test, which still need cleaning
- Mechanical faults in the extract
If you’re not sure, just phone us on 0345 646 2711, or email photos and we’ll give you a straight answer.
What we work on in Blackfen
- Deposit thickness tests
- Post-clean checks
- Pre-clean surveys
- Insurer audits
- Access surveys
- Wet film thickness tests
What staff can safely do
When your team notices a problem between visits, like drips, unusual noise, smells or damaged filters, it’s best reported rather than tackled in-house. We can diagnose it and quote.
Some jobs should never be done in-house: entering ducts, working on fans, testing dampers and taking grease readings call for the right kit, training and safe access. Leave those to us.
TR19 inspection around Blackfen
There are about 144 restaurants, cafés and canteens and about 90 takeaways within 1.5 miles or so of the middle of Blackfen, according to the Food Standards Agency’s register. Where they cook under a canopy, a grease reading is the way to tell whether the extract is due a clean. London jobs typically start after the last service, with loading and roof access agreed with the building first. Blackfen is covered by London Fire Brigade. Its fire safety officers can audit commercial kitchens, and grease in the extract is part of a kitchen’s fire risk.
Term dates shape school work: for a school like Our Lady of the Rosary Catholic Primary School, an extract clean fits neatly into a half-term or summer break. Commuter trade near Falconwood station can mean long cooking hours, and long hours put a kitchen into BESA’s more frequent cleaning bands. Healthcare kitchens, like those at hospitals such as Eltham Community Hospital (about 1.7 miles west), often cook for long hours, which puts them in BESA’s heavier-use bands.
Blackfen is about 2 miles east of Eltham, in Greater London. Whether your site is in the middle of Blackfen or further out, TR19 inspection is available to all kinds of commercial premises, from small sites to large estates. Blackfen is one of 764 places in Greater London where we work for commercial clients. You can also see our page for London, roughly 9 miles from Blackfen.
All of DA15, DA16 and SE9 is covered for TR19 inspection, from the main roads to the quietest streets. That includes premises on Days Lane, Gordon Road and Kent Avenue and nearby roads. We also cover the places around Blackfen: Falconwood (1 mile north), Avery Hill (1 mile west), East Wickham (1 mile north), New Eltham (1 mile south-west) and Longlands (1 mile south). Larger places within reach include London (9 miles north-west), City of Westminster (11 miles north-west), Marylebone (11 miles north-west), Kensington (13 miles west), St Pancras (10 miles north-west) and Shoreditch (9 miles north-west).
Landmarks near Blackfen
Typical jobs here are in premises near The George Staples pub, Harris Academy Falconwood and Shoulder of Mutton Green, among other places. The nearest railway station is Falconwood station, about 0.8 miles north-west of the centre. Nearby you will also find Broadway Shopping Centre (2.3 miles east) and Eltham Community Hospital (1.7 miles west). For a walk, there’s Summer Hill and The Tarn.
Blackfen: your questions answered
Can the work in Blackfen be done at night or at weekends?
Yes, out-of-hours work is a big part of what we do. The work in Blackfen can fit around your hours. Tell us your opening hours when you ask for a quote.
Can school kitchens in Blackfen be cleaned in the holidays?
Yes. The holidays are the usual time for school work. Around Blackfen, the Food Standards Agency lists about 36 schools and colleges with registered kitchens within a mile and a half or so. Send us your term dates when you phone us on 0345 646 2711 or send us an email, and we will fit the work in.
Do you carry out TR19 audits for insurers?
Yes. Many insurers ask for proof of TR19 cleaning and inspection, and our audit gives a clear record of the system’s condition, with recommendations where something needs doing.
What happens if you cannot reach some of it?
They’re listed in the report, never skipped quietly. You will know exactly which parts weren’t reached and why, along with a quote to put access in.
What do you do to protect the area?
Protection goes down first: floor sheeting and covers over nearby surfaces and equipment. We tidy up and take our waste away before we leave.
What do the grease readings need to be?
TR19® Grease says grease should not go over a mean of 200 microns between cleans. 500 microns or more at any point calls for immediate spot cleaning.
How long does a TR19 inspection take?
Expect it to take around an hour or two per canopy and duct system. We fit it around when the kitchen is closed or quiet.
Can you come out in an emergency?
Yes. There’s a 24/7 emergency line for anything that cannot wait until a planned visit. Ring any time and tell us what’s happened.
What happens if it’s left?
A pre-clean survey avoids surprises on the night. Access problems are spotted in advance rather than on the night, and the quote reflects the real job. It’s better booked as a planned job in Blackfen than handled as an emergency.
What you pay depends on how big the system is, the condition it’s in and how easy it is to reach. We give you a fixed price before any work starts, so you know where you stand.
Why choose Duct Doctor in Blackfen
- Survey first, then a fixed quote
- Fully insured
- A BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- In business since 2009
See what affects the cost or our accreditations and certificates.