Buckinghamshire · TR19 inspections and grease testing
TR19 inspections in North Lee
Need TR19 inspection in North Lee? We diagnose first, fix the price and book the work around your hours, finishing with a written report and pictures.
- Insurers asking for TR19 evidence
- Post-clean verification after another contractor’s clean
- Ductwork where grease may be over the TR19 limits
About our TR19 inspection in North Lee
After a clean, post-clean verification checks the result, with new readings and pictures of the cleaned areas. It gives you evidence of how the system was actually left. Typical jobs include uncertainty over how often to clean and confirming a clean reached the whole system, on pre-clean surveys, post-clean checks and deposit thickness tests.
For a kitchen in or near North Lee, the visit is planned around opening hours and the journey, and the clean itself is the same full TR19® job as in any town: canopy to discharge, then a TR19® certificate and a photo report.
Duct Doctor has been trading since 2009, as a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we carry full insurance.
- Place
- North Lee (HP22)
- Region
- Buckinghamshire
- Paperwork
- TR19® certificate and photo report
- Quote
- Fixed quote, usually within a working day
- When we work
- After hours by arrangement; emergencies any time
- Telephone
- 0345 646 2711
- Checked
- 30 October 2026
Common questions in North Lee
Do you cover smaller places like North Lee?
Yes, North Lee is part of our area, however small the site. The journey is planned ahead, so a few details about the route help.
Which fire service covers North Lee?
Fire safety enforcement in North Lee is handled by Buckinghamshire Fire and Rescue Service. TR19® isn’t law, but it’s the benchmark many fire officers and insurers look to when they ask how often the extract is cleaned.
Can you price the work without visiting?
Often, yes. With good photos, the site type and your last report, we can price many jobs. Larger or hidden systems need a survey on site first.
What is a WFTT or DTT grease test?
We measure the grease at set points with a WFTT or DTT test, then compare them with the TR19® Grease figures.
Can you verify a clean after it’s been done?
After a clean, we take new readings and photos to show how the system was left. It works whoever carried out the clean.
What’s TR19?
A BESA specification in two main parts: TR19® Grease for kitchen extract systems and TR19® Air for general ventilation. It is not law, but it’s the benchmark.
At what point does grease need cleaning?
TR19® Grease says the mean shouldn’t exceed 200 microns between cleans, with 500 microns or more anywhere needing immediate spot cleaning.
Why survey before a clean?
We look at the system from canopy to discharge, take grease readings and check access. It lets us plan the clean and give you a fixed quote.
Places near North Lee
More services for North Lee
What we do, step by step
Every visit runs to the same pattern: sheeting and protection first, make the system safe, do the work, clear away and hand over the paperwork. On site, the work takes a morning or less for one kitchen, more where there are several systems. The timing of a visit to North Lee is set by you, and the travel is our side of the planning.
- We agree a time when the kitchen is closed or quiet.
- Every part of the system is examined, end to end.
- We take WFTT or DTT readings at set points along the system.
- We photograph the test points and record any sections we cannot reach.
- We send a report setting out the readings, pictures and next steps.
Getting ready for the visit
- Make sure equipment near the work can be switched off and left to cool
- Agree a time when the area can be out of use
- Let us know how we reach the system, including roofs, risers and plant rooms
Get a fixed quote
To get a fixed quote, give us a ring on 0345 646 2711 or drop us a line with the site type, your trading hours and a short description of the system. A few photos and your last certificate or report help a lot. You will typically have a quote within one working day.
Related advice
Landlords, agents and facilities managers
We regularly work with managing agents. Tell us the site, the work and the access arrangements and we’ll come back with a fixed quote.
If you look after several sites, we can plan visits across the whole estate and price them together. Each site gets its own report and photos, so records stay tidy.
Between visits
Once we have finished, these simple steps help:
- Clean grease off the canopy between professional cleans
- Keep to the recommended interval
- Tell us if menus or opening hours change
- Have the latest report ready for insurance renewals
After the inspection, we send a report showing each reading, its location and pictures. File it alongside your TR19 certificates.
Keep all TR19 records together so you can produce them quickly.
What happens if it’s left?
An EHO visit, an insurance renewal or a fire risk assessment is a bad time to find your extract records are thin. An inspection now gives a site in North Lee a current picture. Somewhere as small as North Lee, losing a kitchen or building to a fault is felt by everyone who uses it.
Putting the work off seldom saves money. Problems in a system tend to grow, and a neglected system can mean more work. If you are not sure what’s needed, call 0345 646 2711, or email photos for straight advice and a fixed quote.
Why us?
- We’re fully insured
- CHAS, SafeContractor and ISO 9001
- Photo reports with every job
- We diagnose before we treat
What your team can do, and what needs us
Day-to-day cleaning is something your team can do: wiping down canopy surfaces, cleaning filters and keeping a simple log. Inside the ducts, risers and fan is specialist work, which is where we come in.
Staff cleaning doesn’t replace a specialist visit; it supports it. Regular in-house cleaning slows the build-up, but hidden parts of the system still need specialist attention.
Signs you need TR19 inspection in North Lee
Looking at a canopy tells you little about what’s in the duct. A system can look clean at the filters and be heavily coated further in, so readings are the reliable guide.
It’s time to book a visit if you see:
- Post-clean verification after another contractor’s clean
- Insurers asking for TR19 evidence
- Parts of the system left out of past cleans
- Missing TR19 certificates or history
School kitchens, at schools like Stoke Mandeville Combined School for example, are usually cleaned in the holidays so no lunches are lost.
Comparing quotes
- Proof of accreditation you can verify
- What hours they’ll be on site
- How VAT is shown on the quote
- What records you will receive afterwards
TR19 inspection in North Lee: the local picture
The FSA’s data shows about 3 pubs and bars registered within roughly a mile and a half of the centre of North Lee. Breakfasts, bar meals and functions all put grease into the extract wherever they’re cooked. It’s Buckinghamshire council that sends environmental health officers to food businesses in North Lee. They look at how clean the premises and equipment are, and the kitchen extract is part of that. A TR19® certificate and photo report after each clean gives you a record to show an inspector. North Lee sits within the area of Buckinghamshire Fire and Rescue Service. In most workplaces, including commercial kitchens, it’s the fire and rescue authority that enforces the Fire Safety Order.
If you run a church or community hall kitchen, near Church of St Mary or elsewhere in North Lee, its extract still collects grease from every lunch and event. A hospital like Stoke Mandeville Hospital, about 1.7 miles north, is the kind of site where a kitchen may cook for patients, staff and visitors all day.
North Lee is about 3 miles south of Aylesbury, in Buckinghamshire. We carry out TR19 inspection for commercial premises of every kind in North Lee and the rest of Buckinghamshire. Across Buckinghamshire, we cover 263 places, and North Lee is one of them. Our Milton Keynes page covers sites nearby (18 miles or so).
Every address in HP22 is within our area for TR19 inspection, from busy streets to back roads. If your site is just outside North Lee, we cover Nash Lee (1 mile south-east), Terrick (1 mile south-east), Chalkshire (1 mile south-east), Stoke Mandeville (1 mile north-east) and Ellesborough (1 mile south). We also work in nearby towns such as Aylesbury (3 miles north), High Wycombe (10 miles south), Chesham (9 miles south-east), Marlow (14 miles south), Amersham (11 miles south-east) and Beaconsfield (13 miles south-east).
Landmarks near North Lee
In North Lee, that means kitchens and buildings near The Mandeville School and the streets around them. For rail, the closest station is Stoke Mandeville station, roughly 1.1 miles north-east of the centre. Well-known places in the area include National Paralympic Heritage Centre (1.9 miles north) and Little Kimble Motte (1.7 miles south). Open spaces near North Lee include Brush Hill Local Nature Reserve and Beacon Hill.
When something else is needed
Not every problem is solved by TR19 inspection, and we’d rather say so up front. It doesn’t solve:
- Parts of the duct nobody can reach yet
- Heavy deposits found on test, which still need cleaning
- Installation problems, which fall under design guidance such as DW172
If in doubt, call 0345 646 2711, or email photos and we’ll say what we think.
What the work covers
- Access surveys
- Deposit thickness tests
- Pre-clean surveys
- Insurer audits
- Post-clean checks
- Wet film thickness tests