Hertfordshire · TR19 inspections and grease testing
TR19 Inspection in Welwyn
TR19 inspection in Welwyn from ventilation hygiene specialists trading since 2009. Out-of-hours visits and 24/7 emergency callout.
- Cleaning intervals that may not suit the kitchen
- Insurance renewals needing proof of TR19 cleaning
- Pre-clean surveys before a first TR19 clean
How we handle TR19 inspection in Welwyn
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. Typical jobs include surveys needed before quoting a full clean and checking the result of a recent clean, across wet film thickness tests, deposit thickness tests and pre-clean surveys.
In a smaller place like Welwyn, many kitchens sit in older buildings or later extensions, with the duct running through a roof space or up an outside wall. Flat runs collect grease and need proper access to clean.
Nothing is signed off by word of mouth: a dated report with pictures of the work, plus a certificate through the BESCA Vent Hygiene Elite portal when the work is a TR19® Grease clean. Any parts we couldn’t reach are recorded on it too.
- Location
- Welwyn (AL6)
- Wider area
- Hertfordshire
- Reporting
- Certificate plus before-and-after pictures
- Price
- A fixed price before work begins
- Working hours
- Overnight and weekend work, 24/7 emergency callout
- Phone
- 0345 646 2711
- Last updated
- 30 October 2026
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.
Under the Regulatory Reform (Fire Safety) Order 2005, the responsible person must assess and reduce fire risk, and that can be the employer, the owner, a landlord, a facilities manager or a managing agent. Where responsibility is shared, records matter even more.
When something else is needed
A few issues sit outside what this work can do:
- Ductwork that was designed or installed badly
- Hidden runs that need access panels first
- Fire safety duties beyond the extract system
If you are not sure, just give us a ring on 0345 646 2711 or drop us a line and we will give you a straight answer before you book.
What the work covers
- Pre-clean surveys
- Access surveys
- Deposit thickness tests
- Insurer audits
- Wet film thickness tests
- Post-clean checks
Also in Welwyn
What TR19 inspection looks like in Welwyn
Food Standards Agency records include about 11 pubs and bars in Welwyn and the streets around it, up to about 1.5 miles out. Any of them serving cooked food has an extract to keep clean, from canopy to discharge. Welwyn is covered by 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. Environmental health officers from Welwyn Hatfield council inspect food businesses in Welwyn. Extraction counts as kitchen equipment, so its condition can come up on the day. Our report lists what was cleaned and when, which is useful to have ready.
If you run catering at a historic house or estate in the area (Digswell House is about 0.9 miles south-east), event kitchens in older buildings often have awkward duct runs that need planning. School kitchens, at schools like Monk's Walk School for example, are normally cleaned in the holidays so no lunches are lost.
Welwyn is about 2 miles north-west of Welwyn Garden City, in Hertfordshire. Whatever kind of site you run in Welwyn, TR19 inspection is something we can help with. We can work out of hours so the site keeps running. Welwyn is one of 381 towns, villages and districts in Hertfordshire we cover for commercial clients. London is in our area too, around 23 miles away.
Here we cover the AL6 postcode area for TR19 inspection. Whether your site is on High Street, London Road and Mimram Place or anywhere close by, we can help. If your site is just outside Welwyn, we cover Monkswood (1 mile south-east), Ayot St Peter (1 mile south-west), Ayot Green (1 mile south-west), Pottersheath (2 miles north) and Codicote (2 miles north-west). Within a short drive, we also cover Watford (14 miles south-west), Hemel Hempstead (12 miles south-west), Stevenage (6 miles north), St Albans (7 miles south-west), Harpenden (6 miles west) and Hitchin (9 miles north).
What’s near Welwyn
Around Welwyn, our work takes us to kitchens and buildings near Stable Door pub, Danesbury Park and Homerswood Primary and Nursery School and the streets around them. Welwyn’s nearest station is Welwyn North station, roughly 1.1 miles south-east of the centre. Well-known places in the area include Queen Elizabeth II Hospital (3.5 miles south) and Datchworth Museum (2.7 miles north-east). The countryside around Welwyn includes Mardley Heath.
Do you need TR19 inspection in Welwyn?
You can’t judge grease thickness by eye. A system can look clean at the filters and be heavily coated further in, so readings are the reliable guide.
Clients typically contact us when they notice one of these:
- Insurers asking for TR19 evidence
- Missing TR19 certificates or history
- Extracts that have never been grease tested
- Kitchens whose menu or hours have changed
A hall kitchen that only cooks for events, whether near Parish Church of St Mary or elsewhere in Welwyn, still needs its extract cleaned, just less often.
Questions to ask before you book
- Whether the whole system is included, or only the parts that are easy to reach
- Their accreditations, such as BESCA Vent Hygiene Elite, CHAS or SafeContractor
- Whether the work can be done while the site is closed
- Whether a written report and photos are included
What the work involves, part by part
Canopy and plenum
The canopy itself is checked inside and out, and note where grease has gathered.
Extract fan and discharge
Grease builds up on the fan blades and inside the housing. We check and test them as part of the inspection.
Welwyn questions
Do you work overnight in Welwyn?
Yes, out-of-hours work is a big part of what we do. It means the site in Welwyn keeps running as normal. Tell us your opening hours when you ask for a quote.
Can school kitchens in Welwyn be cleaned in the holidays?
Yes. Half-terms and the summer break are the natural time for school work. There are about 11 schools, colleges and universities on the FSA’s food hygiene register within about 1.5 miles of Welwyn. Just give us a ring on 0345 646 2711 or send us an email with your term dates and we’ll plan around them.
Can we book visits on a schedule?
Yes. Scheduled maintenance plans are part of what we do, with visits at the interval your system needs. The report from each visit recommends the next date.
What information do you need?
The site address, the type of premises and your opening hours, plus pictures of the system and your last certificate or report if you have one.
How much notice do you need?
Earlier is better, particularly for night and weekend visits. Quotes typically come back within one working day, and there’s a 24/7 line for emergencies.
What happens to the waste?
We take it away when we go. While we work, it’s kept contained to keep the area clean.
What is grease thickness testing?
The Wet Film Thickness Test (WFTT) and Deposit Thickness Test (DTT) measure how thick the grease is at a given point. We take readings at set points from canopy to fan.
How much time does an inspection need?
Testing takes an hour or two for a single kitchen, longer for a large or complex system. Large or multiple systems take longer, so call 0345 646 2711, or email photos and we will plan it.
How it works
Every visit runs to the same pattern: sheeting and protection first, isolate whatever needs isolating, do the work, tidy up and hand over the paperwork. The visit itself takes a couple of hours for a typical kitchen extract system. We plan the journey to Welwyn and bring what the job is likely to need.
- The visit is arranged for when the kitchen isn’t busy.
- Every part of the system is examined, end to end.
- Grease readings are taken at set points using WFTT or DTT.
- Each test point and any access problems are photographed.
- The findings go into a report with readings, pictures and a recommended next clean.
Before we arrive
- Let us know when the site is closed or quiet
- Mention any sign-in, permit or induction we need
- Make sure equipment near the work can be switched off and left to cool
Get a fixed quote
For TR19 inspection in Welwyn, ring 0345 646 2711, or send details by email. Tell us what kind of premises it is and when it’s open, plus photos or the previous report if they’re to hand. We normally send a fixed quote within one working day.
Advice
What staff can safely do
When your team notices a problem between visits, like drips, unusual noise, smells or damaged filters, it’s best reported rather than tackled in-house. We can diagnose it and quote.
A few tasks are always specialist work: opening up ductwork, cleaning fans, drop testing fire dampers and measuring grease need training, the right equipment and safe access. That is our job.
What affects the quote in Welwyn
The survey tells us what the work involves. The main factors are:
- Site rules, permits and inductions
- The condition of the system
- The number of sites or systems
- Parking and loading at the site
No two sites are the same, so we price each one individually. The size of the job, how we reach it, its condition and the working hours all play a part.
Helping us quote
To speed up the quote, please include:
- Problems your staff have spotted
- Where the site is and what kind of site it is
- The paperwork from the last visit, if you have it
- Detail shots of panels, filters and grilles
For 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. Photos and the last report, if you have one, make the quote quicker. You’ll usually have a quote within one working day.