Hertfordshire · TR19 inspections and grease testing
TR19 inspections and grease testing in Wallington, Hertfordshire
TR19 inspection for Wallington, with a survey first and a report with photos at the end. Ask us for a fixed quote.
- Cleaning intervals that may not suit the kitchen
- Missing TR19 certificates or history
- Systems that need surveying before cleaning
TR19 inspection for kitchens and businesses in Wallington
Post-clean verification is a check carried out once the cleaning is done, with new readings and photos of the cleaned areas. It shows whether the system was left in the condition the paperwork describes. We’re often asked to deal with parts of the system left out of past cleans and checking the result of a recent clean, on pre-clean surveys, wet film thickness tests and insurer audits.
Rural kitchens often have long, low duct runs through a roof space or along an outside wall, and those horizontal sections are where grease settles. We agree access and timings in advance.
Duct Doctor has been trading since 2009, and we are 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
- Wallington (SG7)
- Wider area
- Hertfordshire
- Paperwork
- Certificate and photo report
- Quote
- A fixed quote up front
- Working hours
- When your site is closed, plus a 24/7 line
- Phone
- 0345 646 2711
- Page updated
- 30 October 2026
Leave it or put it right?
Catching heavy deposits early keeps the fix small. Left alone, grease keeps building between cleans. Rural sites can’t always move to another kitchen or room when something fails.
Combining work into one visit or one programme can make for a more efficient booking. Mention every system or site you need covered and we’ll price it together.
Why us?
- BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- Out-of-hours work and a 24/7 emergency line
- One number for every site across the South East and London
- Ventilation hygiene specialists since 2009
Common questions in Wallington
Can you come to Wallington after we close?
Yes, evening, overnight and weekend work is normal for us. It means the site in Wallington keeps running as normal. Let us know the hours you’re closed and we will book within them.
Which fire and rescue service is responsible for Wallington?
That’s Hertfordshire Fire and Rescue Service. TR19® is not law, but it’s the benchmark many fire officers and insurers look to when they ask how often the extract is cleaned.
What if parts of the system cannot be reached?
We never leave them off the paperwork. The report says which parts couldn’t be reached and why, and we can quote to improve the access.
Do you cover Wallington?
Yes. Our technicians work in Wallington, within the South East and London area we cover.
What grease levels does TR19 allow?
The TR19® Grease figures are a mean of 200 microns or less between cleans, and immediate spot cleaning wherever a reading hits 500 microns. Our report sets your readings against both.
How much time does an inspection need?
As a guide, it takes an hour or two for a single kitchen, longer for a large or complex system. The size of the system and the access make the difference.
Which kinds of sites do you work on?
All kinds of commercial and public premises: 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.
What is post-clean verification?
A post-clean check records grease readings and pictures after the work, whoever did the clean.
What your team can do, and what needs us
If your staff spot something between visits, like drips, unusual noise, smells or damaged filters, they should report it rather than try to fix it. We can diagnose it and quote.
Staff cleaning does not replace a specialist visit; it supports it. Clean filters and tidy surfaces slow the build-up, but hidden parts of the system still need specialist attention.
Aftercare tips
To keep the system working properly between visits:
- Keep canopy edges and gutters wiped down
- Look out for grease drips round the canopy edge
- Share inspection reports with your insurer or broker when asked
- File every inspection report with your certificates
For an insurer audit, send them the report as it is, with readings, photos and any areas not accessible.
Keep certificates, reports and readings in one place so the history is easy to show.
What the work involves, part by part
Schools, hospitals and care homes
School and college kitchens still need their extract checked. Testing shows whether the interval suits.
Restaurants, pubs and hotels
We test between services, early in the morning or after close so trading isn’t affected.
TR19 inspection around Wallington
Fire safety in Wallington falls to Hertfordshire 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. About 34 miles out from central London, Wallington is part of the South East area we work across. Visits are booked around your hours, evenings and weekends included.
If you run catering at a healthcare site, such as a hospital like Fairfield Hospital about 5.6 miles west, the extract may need cleaning more often than a part-time kitchen. If your kitchen is in a listed or historic building, like the houses around Wallington (Hinxworth Place is about 4.9 miles north-west), fitting access panels needs care. Volunteers running a hall kitchen near Church of St Mary, or anywhere in Wallington, may not know when the extract was last cleaned, and a grease test settles it.
Wallington is about 5 miles east of Letchworth, in Hertfordshire. Whatever kind of site you run in Wallington, TR19 inspection is something we can help with. Visits can be booked for evenings, overnight or weekends so the site keeps running. We cover 381 places across Hertfordshire, large and small. You can also see our page for Milton Keynes, roughly 28 miles from Wallington.
Work in SG7 follows the same survey, fixed quote and written report as everywhere else we cover. Streets in the area include The Street and Kit's Lane, and we cover them all for TR19 inspection. Close by, we work in Clothall (2 miles south-west), Baldock (3 miles west), Weston (3 miles south-west), Walkern (5 miles south) and St Nicholas (5 miles south-west). Larger places within reach include Stevenage (6 miles south-west), Bishop's Stortford (14 miles south-east), Welwyn Garden City (14 miles south), Harpenden (15 miles south-west), Hitchin (7 miles west) and Hertford (13 miles south).
Near you in Wallington
The closest station to Wallington is Ashwell & Morden station, roughly 2.9 miles north. Other landmarks nearby include Ashwell Village Museum (3.9 miles north-west) and Fairfield Hospital (5.6 miles west). Not far away are Hawkins Wood.
When it’s something else
TR19 inspection can’t fix everything, and we’d rather say so up front. It won’t put right:
- The grease itself, which needs a full or spot clean
- The legal duty, which stays with the responsible person
- Ductwork that was designed or installed badly
If in doubt, phone us on 0345 646 2711, or send details by email and we will say what we think.
What we work on in Wallington
- Pre-clean surveys
- Insurer audits
- Post-clean checks
- Wet film thickness tests
- Deposit thickness tests
- Access surveys
How it works
We work around your opening hours, not the other way round. We book the visit for a time the area is closed, whether that is an evening, overnight or a weekend. When the team arrives, the work area is protected and the relevant equipment is switched off to cool, and the job takes anything from an hour for a small canopy and short duct to a good part of a day for a large site. Rural roads and tight entrances are worth telling us about before a visit to Wallington.
- The visit is arranged for when the kitchen isn’t busy.
- Every part of the system is examined, end to end.
- Grease thickness is measured at set points by WFTT or DTT.
- We photograph the test points and record any sections we cannot reach.
- The findings go into a report with readings, pictures and a recommended next clean.
How to prepare
- Make sure someone can let us in and lock up afterwards
- Make sure equipment near the work can be switched off and left to cool
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
How to get a quote
Some systems can be priced from photos; 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.
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How we price TR19 inspection
There’s no set price list, because sites vary so much. What we look at:
- One-off work versus a regular cycle
- Parking and loading at the site
- Whether several sites go on one quote
- Any permits to work or inductions
The price reflects the work, not guesswork. That is why every job is surveyed first, and why the quote is fixed before work begins.
What we need to know
A few details help us quote accurately. When you get in touch, it helps to send:
- Close-ups of filters, grilles, hatches or access panels
- Any previous report or certificate
- Where the site is and what kind of site it is
- Photos showing the whole system and its surroundings
Quotes are quick. Call or email with a few details and you will normally have a fixed price within one working day. Where a survey is needed, we arrange a time that suits the site.