Buckinghamshire · TR19 inspections and grease testing
TR19 inspections in Denham
TR19 inspection across Denham and nearby, timed so the site keeps working and signed off in writing with pictures.
- Sites with gaps in their extract records
- Systems cleaned on a calendar with no measurements
- An insurer’s request for a TR19 audit
TR19 inspection in Denham
TR19® Grease says grease should not exceed a mean of 200 microns between cleans, while a reading of 500 microns or more anywhere calls for immediate spot cleaning. Grease testing shows which side of those lines you’re on. Common call-outs are for kitchens whose menu or hours have changed and extracts that have never been grease tested, on post-clean checks, access surveys and pre-clean surveys.
Rural kitchens often have long, low duct runs through a roof space or along an outside wall, where grease settles in the flat sections. We agree access and timings in advance.
Each visit ends with a written report and photos, so there’s a dated record of the work. Where the work is a TR19® Grease clean, the certificate is issued through the BESCA Vent Hygiene Elite portal.
- Place
- Denham (UB9)
- Wider area
- Buckinghamshire
- Reporting
- Certificate plus before-and-after pictures
- Quotes
- Fixed quote, typically within a working day
- Hours
- Nights, weekends or holidays to suit you
- Telephone
- 0345 646 2711
- Updated
- 30 October 2026
How the visit works
Everything the job needs comes with us, including protection sheets, the right tools and access kit. All we need from you is clear access and the right equipment switched off. The visit 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 Denham.
- First we look at the system’s cleaning history, if there is one.
- The layout is traced from the canopy to the discharge.
- Access panels are located and any missing ones noted.
- We measure the grease and photograph each point.
- We report back with readings and a fixed quote.
Preparing for the visit
- Find the previous report, if there is one
- Tell us about site rules, permits or sign-in
- Agree a time when the area can be out of use
How to get a quote
If you need TR19 inspection in Denham, call 0345 646 2711, or email photos. Let us know the site type and the opening hours, and send photos or your last report if you can. A fixed quote typically follows within one working day.
Related advice
How the job changes from site to site
Schools, hospitals and care homes
Education kitchens need TR19 inspections like any other. Testing shows whether the interval suits.
Restaurants, pubs and hotels
Heavy use under BESA guidance, 12 to 16 hours a day, means a clean at least every 3 months, and readings show whether that is enough.
How we price TR19 inspection
Sites vary more than people expect. What affects the quote:
- One-off work versus a regular cycle
- Access, including roofs, risers and ceiling voids
- How many systems or sites are involved
- How big the system is
No two sites are the same, so we price each one individually. Size, access, the condition of the system and when we can work all play a part.
Asking for a quote
To help us quote quickly, send us:
- Any symptoms, from odd noises to smells or leaks
- Photos showing the whole system and its surroundings
- The times we could work without disrupting the site
- Your last certificate, test record or report
Some systems can be priced from pictures; others need a survey. 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.
Kitchen extracts in Denham
The Food Standards Agency lists about 14 pubs and bars as registered food businesses across Denham and its immediate surroundings (about a mile and a half). Where they serve hot food, their kitchen extracts need cleaning to TR19® like any restaurant’s. Denham is covered by Buckinghamshire Fire and Rescue Service. Grease in a kitchen extract is a recognised fire risk, and the fire authority enforces the law on managing it in most commercial premises. In Denham, food businesses are inspected by environmental health officers from Buckinghamshire council. The cleanliness of the kitchen and its equipment, extraction included, is part of what they check. Before-and-after pictures from each clean are a simple way to show the extract is in hand.
School kitchens, at schools like Denham Village School for example, are normally cleaned in the holidays so no lunches are lost. Church and community hall kitchens, near Church of St Mary or anywhere around Denham, are easy to forget, but their extracts collect grease like any other.
Denham is about 3 miles north-west of Hillingdon, in Buckinghamshire. From the centre of Denham to the outskirts, we cover TR19 inspection for every kind of premises, from small sites to large estates. Denham is one of 263 towns, villages and districts in Buckinghamshire we cover for commercial clients. We also work in London, about 18 miles from Denham.
Our technicians cover all of the UB9 postcode area for TR19 inspection and the roads nearby. Whether your site is on Denham Way, Baconsmead and Ash Mead Drive or a nearby road, we can help. Close by, we work in New Denham (1 mile south-east), South Harefield (2 miles north), Newyears Green (2 miles north-east), Uxbridge (2 miles south-east) and Ickenham (2 miles east). Further out, we also cover High Wycombe (12 miles west), Chesham (11 miles north-west), Marlow (12 miles west), Amersham (9 miles north-west), Beaconsfield (7 miles north-west) and Chalfont St Peter (4 miles north-west).
Near you in Denham
Around Denham, our work takes us to kitchens and buildings near The King pub and Vyners School and the streets around them. The closest station to Denham is Denham station, about 0.7 miles north. Well-known places in the area include Hillingdon Museum and Archives Services (1.8 miles south-east) and Harefield Hospital (2.8 miles north). Not far away are Kingcup Meadows and Oldhouse Wood and Horse Shoe Bay.
Nearby places to Denham
Other services in Denham
In-house cleaning or a specialist?
In-house cleaning and specialist cleaning do different jobs. A daily filter wipe and a weekly filter wash keep grease down at the front of the system, but they do not reach the grease that builds up further in. That part needs specialist access and equipment.
Your own staff can handle the daily basics: wiping down canopy surfaces, cleaning filters and keeping a simple log. Inside the ducts, risers and fan is specialist work, and that’s where we come in.
What we’re called out for in Denham
Menus, opening hours and cooking styles change over time, and more frying or longer hours mean more grease. A cleaning interval set years ago may no longer fit.
Look out for any of the following:
- Insurance renewals needing proof of TR19 cleaning
- Heavy grease suspected in the plenum or ducts
- Post-clean verification after another contractor’s clean
- Missing access panels found on survey
If you run catering at a healthcare site, such as a hospital like Harefield Hospital about 2.8 miles north, the extract may need cleaning more often than a part-time kitchen.
What your quote should include
- How areas they cannot reach will be recorded
- If the quote is a fixed price or an estimate
- When they can work, and whether that’s outside your opening hours
- Proof of insurance
FAQs for Denham
Is Denham within the area you cover?
Yes, Denham is part of our area, however small the site. Photos of the system and directions to the site help us plan the visit.
Can you work in Denham outside opening hours?
Yes, evening, overnight and weekend work is normal for us. The work in Denham can fit around your hours. Let us know the hours you’re closed and we will book within them.
What accreditations do you have?
CHAS, SafeContractor, ISO 9001 and BESCA Vent Hygiene Elite membership, cleaning to BESA TR19® Grease. We’ve been trading since 2009 and we’re fully insured.
Can you inspect our extract for our insurance company?
Yes. We inspect the system and produce a report with grease readings, pictures and any inaccessible areas. It’s set out for your insurer or broker.
What does a pre-clean survey involve?
We survey, measure and photograph the system first. We can work from photos and details, or visit, as suits the job.
Is there a survey before the work?
Yes, every time. Diagnosis comes before treatment: the survey tells us what the system needs and how to reach it and the fixed quote is built on it.
What is grease thickness testing?
It’s a measurement of how much grease is coating the inside of the extract, using the Wet Film Thickness Test (WFTT) or Deposit Thickness Test (DTT). Each reading is recorded in microns.
Can you quote from photos?
Yes, if we can see what we need. Otherwise, we book a survey at a time that suits the site, and the quote follows that.
Aftercare tips
Looking after the system between visits is straightforward, and it makes the next visit easier:
- Tell us if menus or opening hours change
- Keep TR19 certificates, readings and reports together
- Flag oily drips near the extract
- Keep grease filters clean and fitted properly
The audit report is set out to pass straight to your insurer or broker, with readings, pictures and any areas not accessible.
Clean, correctly fitted filters stop more grease reaching the duct. Gaps around filters let grease get past them.
For landlords and multi-site operators
Facilities teams in offices, schools and healthcare sites book us too in Denham and across Buckinghamshire. Larger estates can be phased building by building around the people who use them.
Landlords, managing agents and facilities managers book us, not only the businesses that use the systems. Where a system serves more than one tenant, such as a shared riser, it helps to agree who arranges the work, and we’re happy to quote for all of it.