Buckinghamshire · TR19 inspections and grease testing
TR19 inspections in Chartridge
TR19 inspections, grease thickness testing, pre-clean surveys and post-clean verification for commercial sites in Chartridge and across Buckinghamshire. CHAS, SafeContractor and ISO 9001, and fully insured.
- Missing TR19 certificates or history
- Missing access panels found on survey
- Heavy grease suspected in the plenum or ducts
Do you need TR19 inspection in Chartridge?
As hot, greasy air travels up the duct, it cools and leaves a film behind. It often collects where nobody can see it: the plenum, bends and horizontal runs.
What we are most often called out for:
- Kitchen extract systems with no recent grease readings
- Kitchens whose menu or hours have changed
- Kitchens taken over with no cleaning records
- An insurer’s request for a TR19 audit
For schools such as Chartridge Combined School, kitchen extract cleaning is typically booked for the holidays, when the canteen is closed.
Before booking anyone
- What’s included in the scope, part by part
- Whether VAT is included
- What insurance they carry
- Whether the work can be done while the site is closed
TR19 inspection in Chartridge
Grease thickness testing tells you how much grease is sitting in the canopy, ducts and fan. Readings are taken at set points using the Wet Film Thickness Test (WFTT) or the Deposit Thickness Test (DTT). The results show whether the system needs cleaning and how soon. The work covers pre-clean surveys, access surveys and wet film thickness tests, and the jobs we see most are heavy grease suspected in the plenum or ducts and checking the result of a recent clean.
Somewhere as small as Chartridge, commercial kitchens are few: perhaps a pub, a school or care home kitchen, or a hall used for events. Every one of them still needs its extract kept clear of grease, whatever the size of the place.
It’s worth checking any contractor’s accreditations. Ours are BESCA Vent Hygiene Elite membership, cleaning to BESA TR19® Grease, plus CHAS, SafeContractor and ISO 9001, and we’re fully insured.
- Where
- Chartridge (HP5)
- Wider area
- Buckinghamshire
- Records
- TR19® certificate and photo report
- Quotes
- A fixed price before any work starts
- Hours
- Evenings, overnight and weekends; 24/7 emergencies
- Telephone
- 0345 646 2711
- Page updated
- 30 October 2026
Towns and villages near Chartridge
Other services in Chartridge
Chartridge kitchens: local notes
Chartridge is about 28 miles from central London, well within the area we cover across London and the South East. A survey and a fixed quote come first, then the visit at a time that suits you. The fire and rescue service for Chartridge is Buckinghamshire Fire and Rescue Service. Its fire safety officers can audit commercial kitchens, and grease in the extract is part of a kitchen’s fire risk.
Healthcare kitchens, like those at hospitals such as Chiltern Hospital (about 3.1 miles south-west), often cook for long hours, which puts them in BESA’s heavier-use bands. Volunteers running a hall kitchen near St John's Church, or anywhere in Chartridge, may not know when the extract was last cleaned, and a grease test settles it.
Chartridge is about 2 miles north-west of Chesham, in Buckinghamshire. Sites in Chartridge get the same service as everywhere we cover: diagnosis first, a fixed price, out-of-hours working where needed and a written report with photos. Chartridge is one of 263 places in Buckinghamshire where we work for commercial clients. Our Milton Keynes page covers sites nearby (22 miles or so).
All of HP5 is within our area for TR19 inspection, from the main roads to the quietest streets. TR19 inspection is available to premises on Chartridge Grange Drive and Cogdells Lane and nearby roads. Other places close to Chartridge include Asheridge (1 mile north-east), Bellingdon (1 mile north), Hundridge (1 mile south), Ballinger Common (1 mile west) and Pond Park (1 mile east). Within a short drive, we also cover Aylesbury (10 miles north-west), High Wycombe (8 miles south-west), Marlow (12 miles south-west), Amersham (4 miles south-east), Beaconsfield (8 miles south) and Chalfont St Peter (9 miles south-east).
Around Chartridge
In Chartridge, that means kitchens and buildings near Chiltern Hills Academy and The Bell pub. Chartridge’s nearest station is Great Missenden station, roughly 3.1 miles south-west of the centre. A little further out are Roald Dahl Museum and Story Centre (3 miles south-west) and Hawridge Court (1.5 miles north-east). Green spaces nearby include Pavis Wood and Sands Bank.
What a clean will not put right
An honest diagnosis matters more to us than a booking, so here’s what this work cannot put right:
- Ductwork that was designed or installed badly
- Heavy deposits found on test, which still need cleaning
- Hidden runs that need access panels first
If in doubt, call us on 0345 646 2711 or drop us a line and we will say what we think.
What the work covers
- Access surveys
- Wet film thickness tests
- Post-clean checks
- Deposit thickness tests
- Insurer audits
- Pre-clean surveys
How the job changes from site to site
Schools, hospitals and care homes
We fit testing around service times and school holidays to avoid disruption.
Restaurants, pubs and hotels
Inspections are done when the kitchen is closed or quiet so trading isn’t affected.
Common questions in Chartridge
Can school kitchens in Chartridge be cleaned in the holidays?
Yes. The holidays are the usual time for school work. There are about 5 schools, colleges and universities on the FSA’s food hygiene register within about 1.5 miles of Chartridge. Send us your term dates when you call 0345 646 2711 or drop us a line, and we’ll fit the work in.
Which fire service covers Chartridge?
It’s Buckinghamshire Fire and Rescue Service, which covers Chartridge. Records of extract cleaning are a sensible thing to have ready if a fire safety officer carries out an audit.
How do you measure grease in a kitchen extract?
Grease thickness testing measures the layer of grease on the duct surfaces, using the Wet Film Thickness Test (WFTT) or Deposit Thickness Test (DTT). Each reading is recorded in microns.
What types of premises do you cover?
Commercial premises of every kind: from restaurants, pubs and hotels to schools, hospitals, care homes, offices, shops and food production sites. We fit the work around how the site operates.
Which accreditations do you hold?
Duct Doctor is a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. CHAS, SafeContractor and ISO 9001 are in place too, and we carry full insurance.
Can the work be done while we’re closed?
Yes. Much of our work happens in the evening, overnight or at weekends, so the site doesn’t lose a service.
What does a pre-clean survey involve?
It’s a look at the whole extract before it’s cleaned, with readings and photos. We can work from pictures and details, or visit, as suits the job.
Can you come out in an emergency?
Yes. Our emergency line runs 24/7 for anything that cannot wait until a planned visit. Ring any time and tell us what’s happened.
What your team can do, and what needs us
Your own staff can handle the daily basics: wiping canopies, washing grease filters and recording it in a log. What they can’t safely do is clean inside the ductwork, the fan or the risers, which is where we come in.
When your team notices a problem between visits, such as dripping grease, a noisy fan, a smell or a filter that will not come clean, it’s best reported rather than tackled in-house. We will take a look and give you a fixed quote.
How it works
We start by comparing what we find with the survey or your photos. If anything is different, we talk it through with the person on site before carrying on. From there, it takes a morning or less for one kitchen, more where there are several systems. Photos of the system and how to reach it help us plan a visit to Chartridge.
- First we look at the system’s cleaning history, if there is one.
- We follow the extract from canopy to discharge.
- Access panels are located and any missing ones noted.
- Grease readings are taken and photos recorded.
- We report back with readings and a fixed quote.
Before we arrive
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
- Dig out any earlier paperwork for the system
- Mention any sign-in, permit or induction we need
Get a fixed quote
If you need TR19 inspection in Chartridge, call 0345 646 2711 or email us. Let us know the site type and the opening hours, and send pictures or your last report if you can. A fixed quote normally follows within one working day.
Advice
Landlords, agents and facilities managers
We regularly work with managing agents. Send the address, what’s needed and how access works, and we will send a fixed quote.
Records are where multi-site compliance often slips. Each visit produces a dated report with pictures, ready to show insurers, fire officers or EHOs.
Between visits
To keep the system working properly between visits:
- Keep grease filters clean and fitted properly
- Have the latest report ready for insurance renewals
- Diary the next grease test and clean
- Mention new equipment or longer hours at the next test
Each report suggests the next clean and the next test, based on the readings and how the kitchen is used.
Regular grease readings keep the cleaning interval honest. It shows if build-up is speeding up.