Oxfordshire · TR19 inspections and grease testing
TR19 Inspection in Lower Assendon
TR19 inspections, grease thickness testing, pre-clean surveys and post-clean verification for commercial sites in Lower Assendon and across Oxfordshire. CHAS, SafeContractor and ISO 9001, and fully insured.
- Heavy grease suspected in the plenum or ducts
- Missing access panels found on survey
- An insurer’s request for a TR19 audit
Signs you need TR19 inspection in Lower Assendon
Menus, opening hours and cooking styles change over time, and more frying or longer hours mean more grease. The old cleaning schedule may not match the kitchen any more.
Common reasons sites call us include:
- Sites with gaps in their extract records
- Confirming a clean reached the whole system
- Ductwork where grease may be over the TR19 limits
- Systems that need surveying before cleaning
Greys Court, about 1.6 miles south-west, is one of the historic houses near Lower Assendon; if you run event catering at a venue like that, cleans can be booked between functions.
What your quote should include
- What happens if part of the system cannot be accessed
- When the next visit should be, and why
- What paperwork you get at the end
- What’s included in the scope, part by part
How we handle TR19 inspection in Lower Assendon
A grease test measures how thick the grease is inside a kitchen extract system. Readings are taken at set points using the Wet Film Thickness Test (WFTT) or the Deposit Thickness Test (DTT). From the numbers, you can see whether cleaning is due. If you are dealing with ductwork where grease may be over the TR19 limits and uncertainty over how often to clean, we can help, from access surveys, wet film thickness tests and insurer audits onwards.
In a small place like Lower Assendon, kitchens are often in older or extended buildings, with long single-storey duct runs, where grease settles in the flat sections. We agree access and timings in advance.
Duct Doctor has been trading since 2009, as 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.
- Where
- Lower Assendon (RG9)
- Wider area
- Oxfordshire
- Reporting
- Certificate and photo report
- Price
- A fixed quote up front
- When we work
- Overnight and weekend work, 24/7 emergency callout
- Telephone
- 0345 646 2711
- Checked
- 30 October 2026
What affects the cost of TR19 inspection
The diagnosis comes before the price. We look at:
- Travel, parking and unloading
- The number of sites or systems
- A single visit or a regular plan
- When the work can happen, such as evenings, overnight or weekends
A single site or a whole portfolio, the quote is built the same way: what needs doing, how we get to it and when. You’ll have a fixed price before work begins.
Asking for a quote
What to send for a quote:
- Your opening hours and when the area is out of use
- A few general shots of the system
- Close-ups of filters, grilles, hatches or access panels
- Any symptoms, from odd noises to smells or leaks
To get a fixed quote, ring 0345 646 2711 or email us 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. We typically come back within one working day.
For landlords and multi-site operators
Multi-site operators often want one contractor and one number. We cover South East England and London, so a run of sites can go into one programme and kept on a regular cycle.
Keeping records across a portfolio is half the battle. Each visit produces a dated report with photos, ready to show insurers, fire officers or EHOs.
When something else is needed
Before booking, it helps to know what’s not included:
- Heavy deposits found on test, which still need cleaning
- Installation problems, which fall under design guidance such as DW172
- Parts of the duct nobody can reach yet
If in doubt, give us a ring on 0345 646 2711, or send details by email and we’ll say what we think before you book.
What we work on in Lower Assendon
- Post-clean checks
- Access surveys
- Pre-clean surveys
- Wet film thickness tests
- Deposit thickness tests
- Insurer audits
Questions from Lower Assendon
Do you work overnight in Lower Assendon?
Yes, nights and weekends are routine for us. Your customers, staff or residents in Lower Assendon needn’t be disturbed. When you give us a ring on 0345 646 2711 or email us, mention when the site is quiet.
Who carries out food hygiene inspections in Lower Assendon?
The local authority for Lower Assendon is Buckinghamshire council, and its environmental health team does the inspecting. How often a business is inspected depends on the risk rating the council gives it, so it’s worth staying ready all year.
What happens if you can’t reach some of it?
Anything we can’t reach goes on the report, with a note of where it is, and we tell you what would make it reachable, such as extra access panels in ductwork.
Do you check other contractors’ cleans?
It’s an inspection after cleaning, to show what state the system was left in, for our cleans and other firms’ alike.
What do you do to protect the area?
With sheeting and covers, before anything else happens. We keep the work contained and clean down when we finish.
What types of premises do you cover?
Commercial premises of every kind: kitchens, offices, schools, healthcare, retail, leisure and food production. Work is timed around how each site runs.
How far ahead should we book?
It depends on the time you need and how big the job is. Tell us your preferred dates when you ask for a quote, and if it’s an emergency, call us any time.
How long does a TR19 inspection take?
As a guide, it takes an hour or two for a single kitchen, longer for a large or complex system. System size and access decide the rest.
Kitchen extracts in Lower Assendon
There are about 4 restaurants, cafés and works canteens within roughly a mile and a half of the centre of Lower Assendon, 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. The fire and rescue service for Lower Assendon is Oxfordshire Fire and Rescue Service. Fire and rescue authorities enforce the Fire Safety Order in most non-domestic premises, and in a kitchen that fire risk includes the grease in the extract. In Lower Assendon, 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. Keeping each certificate and photo report on file helps show the extract is looked after.
Bursars and site managers at schools such as Rupert House School tend to book extract cleaning for when the kitchen is empty. Volunteers running a hall kitchen near Church of St Anne, or anywhere in Lower Assendon, may not know when the extract was last cleaned, and a grease test settles it.
Lower Assendon is about 6 miles north of Caversham, in Oxfordshire. We provide TR19 inspection for commercial premises of every kind in Lower Assendon and the rest of Oxfordshire. Lower Assendon is one of 443 places in Oxfordshire we cover for commercial clients. For sites nearby, see our Reading page, about 8 miles away.
Work in RG9 is surveyed, quoted and booked the same way as anywhere else. Streets in the area include Old Bix Road and Fair Mile, and we cover them all for TR19 inspection. Close by, we work in Middle Assendon (1 mile north-west), Bix (1 mile north-west), Fawley Bottom (1 mile north), Fawley (1 mile north-east) and Henley-on-Thames (2 miles south-east). Within a short drive, we also cover Didcot (14 miles west), Thame (13 miles north), Benson (9 miles north-west), Chinnor (10 miles north), Tilehurst (8 miles south-west) and Wallingford (9 miles west).
Landmarks near Lower Assendon
Typical jobs here are in premises near Golden Ball Public House, Fawley Court and Temple Island and Gillotts School. The closest station to Lower Assendon is Henley-On-Thames station, about 1.9 miles south-east. Other landmarks nearby include Frazer Nash Archives (2.2 miles south-east). Open spaces near Lower Assendon include Warburg Nature Reserve.
Why deal with it now?
Surveying first means the clean goes to plan. Access problems are spotted in advance rather than on the night, so the clean covers the whole system. In a place like Lower Assendon, ductwork and fans are easy to forget until something goes wrong.
Working hours, access and the scale of the site all affect the cost. Each of those is built into the quote and give you a fixed price before work begins.
Why Lower Assendon businesses choose us
- One number for every site across the South East and London
- Fixed quotes from a survey or pictures
- Full insurance on every job
- Trading since 2009
Aftercare tips
Simple habits between visits make a real difference. Our advice:
- Share inspection reports with your insurer or broker when asked
- Never cook with filters missing
- Tell us if menus or opening hours change
- Keep canopy edges and gutters wiped down
After the inspection, we send a report showing each reading, its location and photos. File it alongside your TR19 certificates.
Revisit the cleaning interval whenever the menu or hours change. Fresh readings show whether it needs to change.
The process
There are three stages on the day: set-up, the treatment itself and the sign-off. Getting ready means protecting surfaces and switching off what needs to be off, while signing off means the written report and pictures. Most of the time goes on the work itself, which takes a couple of hours for a typical kitchen extract system. The timing of a visit to Lower Assendon is set by you, and the travel is our side of the planning.
- We agree a time when the kitchen is closed or quiet.
- The system is checked from canopy to discharge.
- Grease thickness is measured at set points by WFTT or DTT.
- Photos are taken at each point, and access gaps noted.
- You get a report with readings, pictures and recommendations.
Getting ready for the visit
- Clear loose items from the work area
- Tell us where we can park and unload
- Dig out any earlier paperwork for the system
How to get a quote
Photos are enough for some jobs, while others need a look on site. Big or complicated sites, and systems that are hard to see in pictures, get a survey first. Either way, you get a fixed price before we start.