Hertfordshire · TR19 inspections and grease testing
TR19 inspections and grease testing in Tewin Wood, Hertfordshire
TR19 inspection for Tewin Wood, with a survey first and a report with photos at the end. Call for a fixed quote.
- Sites with gaps in their extract records
- Post-clean verification after another contractor’s clean
- Heavy grease suspected in the plenum or ducts
How the job changes from site to site
Vertical risers
Risers can be hard to get into. We record what can and can’t be reached.
Canopy and plenum
The plenum behind the filters can carry a lot of grease. We take readings there and photograph it on every inspection.
TR19 inspection in Tewin Wood
BESA sets minimum cleaning intervals by daily use: heavy use (12 to 16 hours a day) every 3 months, moderate use (6 to 12 hours) every 6 months and light use (2 to 6 hours) every 12 months. Grease testing shows whether your kitchen needs cleaning more often than that. If you have systems cleaned on a calendar with no measurements and heavy grease suspected in the plenum or ducts, we can help.
For a kitchen in or near Tewin Wood, 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, filters, duct, fan and discharge, with a certificate and photo report at the end.
The sign-off is always in writing: a written report, dated and illustrated with photos, and for TR19® Grease cleans, a certificate issued through the BESCA VHE portal. It shows what was done and what, if anything, couldn’t be reached.
- Where
- Tewin Wood (AL6)
- Region
- Hertfordshire
- Records
- Certificate and photo report
- Quote
- A fixed price before any work starts
- Hours
- Overnight and weekend work, 24/7 emergency callout
- Telephone
- 0345 646 2711
- Updated
- 30 October 2026
The process
When we arrive, we check the system against the survey or the photos you sent. If anything is different, we talk it through with the person on site before carrying on. After that, the work takes a morning or less for one kitchen, more where there are several systems. For a village or hamlet like Tewin Wood, tell us about narrow lanes, gates and parking when you book.
- Post-clean verification is booked once the clean is done.
- The same access points are opened up.
- We repeat the WFTT or DTT readings.
- We photograph each area to record how it was left.
- The results are reported, with anything missed flagged.
Before we arrive
- Name a contact who can let us in at the agreed time
- Let us know when the site is closed or quiet
- Allow time for equipment near the work to be turned off and cool down
Ask for a quote
For a fixed quote, give us a ring on 0345 646 2711, or email photos and tell us the type of site, your opening hours and roughly what the system looks like. Photos and the last report, if you have one, make the quote quicker. We usually come back within one working day.
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TR19 inspection in Tewin Wood: the local picture
The Food Standards Agency lists about 7 pubs and bars as registered food businesses within about 1.5 miles of central Tewin Wood. Any of them serving cooked food has an extract to keep clean, from canopy to discharge. Fire safety in Tewin Wood 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. In Tewin Wood, food businesses are inspected by environmental health officers from East Hertfordshire council. A greasy canopy or dripping filters are the sort of thing an inspection can pick up. Keeping each certificate and photo report on file helps show the extract is looked after.
Healthcare kitchens, like those at hospitals such as Queen Elizabeth II Hospital (about 3.5 miles south), often cook for long hours, which puts them in BESA’s heavier-use bands. If your kitchen is in a listed or historic building, like the houses around Tewin Wood (Digswell House is about 2.1 miles south-west), fitting access panels needs care.
Tewin Wood is about 3 miles north-east of Welwyn Garden City, in Hertfordshire. Tewin Wood gets the same approach as every site we work on: diagnosis first, a fixed price, out-of-hours working where necessary and a written report with photos. Tewin Wood is one of 381 places in Hertfordshire we cover for commercial clients. For sites nearby, see our London page (23 miles or so).
We cover every part of the AL6 postcode area for TR19 inspection and the roads nearby. TR19 inspection is available to premises on Cowpers Way, Desborough Drive and Firs Walk and nearby roads. We also cover Burnham Green (1 mile north-west), Bull's Green (1 mile north), Harmer Green (1 mile west), Tewin (1 mile south) and Datchworth (1 mile north). We also work in nearby towns such as Watford (15 miles south-west), Hemel Hempstead (14 miles south-west), Stevenage (5 miles north), St Albans (9 miles south-west), Bishop's Stortford (14 miles east) and Welwyn Garden City (3 miles south-west).
Near you in Tewin Wood
We work in commercial kitchens and buildings around Belmont pub, among other places. Tewin Wood’s nearest station is Welwyn North station, roughly 1.4 miles west. A little further out are Howard Centre (2.8 miles south-west) and Hertford Castle (4.3 miles south-east). Green spaces nearby include Tewin Orchard and Hopkyns Wood.
How we price TR19 inspection
There’s no set price list, because no two systems are the same. What we look at:
- When the work can happen, such as evenings, overnight or weekends
- The condition we find in the survey
- The size of the system
- Site rules, permits and inductions
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 make a difference.
Helping us quote
Photos let us diagnose from a distance. The most useful are:
- Detail shots of panels, filters and grilles
- A few general shots of the system
- Problems your staff have spotted
- Where the plant sits or the system leaves the building, such as a roof or outside wall
Photos are the quickest way to a quote: the system from a couple of angles, plus any access panels or hatches. Tell us what kind of site it is and when it’s open, and many jobs can be priced from that alone.
Tewin Wood: your questions answered
Who inspects food businesses in Tewin Wood?
Kitchens in Tewin Wood are inspected by East Hertfordshire council’s environmental health officers. It helps to keep the extract cleaning records with your food safety paperwork, so they’re ready if asked for.
Do you work at weekends in Tewin Wood?
Yes, we can come after you close and finish before you open. The work in Tewin Wood can fit around your hours. When you ring 0345 646 2711, or send details by email, mention when the site is quiet.
Is a quote from pictures possible?
Normally, yes. Send a few wide photos plus close-ups of panels, filters or grilles, and a fixed quote normally follows within one working day. Some sites still need a visit, and we will say so.
Can you set up regular visits?
Yes. Regular plans can run on 3, 6 or 12-monthly cycles, to suit the system and how it’s used.
What is post-clean verification?
It’s an inspection after cleaning, to show what state the system was left in, whoever did the clean.
How long does grease testing take?
It takes a couple of hours for a typical kitchen extract system. The visit is timed so cooking isn’t disrupted.
Is TR19 cleaning the law?
No. TR19® isn’t law; it’s BESA’s specification. The law is the Fire Safety Order 2005, under which the responsible person must manage fire risk, and insurers, fire officers and EHOs look to TR19® as the benchmark.
What is TR19?
BESA’s ventilation hygiene specification in two main parts: TR19® Grease for kitchen extracts and TR19® Air for supply and extract systems. It is not law, but it’s the benchmark.
Keeping the system healthy
Good habits slow the build-up between visits. A few tips:
- Never cook with filters missing
- Clean grease off the canopy between professional cleans
- Mention new equipment or longer hours at the next test
- Keep to the recommended interval
You get a report with the grease readings, where they were taken and photos of each point. File it alongside your TR19 certificates.
Clean, correctly fitted filters stop more grease reaching the duct. Gaps around filters let grease get past them.
What TR19 inspection cannot fix
We’d rather tell you now than book work that will not help, so these are the things it will not cover:
- Parts of the duct nobody can reach yet
- Fan breakdowns, which need a repair visit
- The grease itself, which needs a full or spot clean
Not sure which it is? You can give us a ring on 0345 646 2711, or email photos and we will tell you honestly.
Where we work
- Wet film thickness tests
- Access surveys
- Pre-clean surveys
- Post-clean checks
- Deposit thickness tests
- Insurer audits
Nearby places to Tewin Wood
Other services in Tewin Wood
Landlords, agents and facilities managers
Landlords, managing agents and facilities managers book us, not only the businesses that use the systems. Shared systems, like a riser serving several units, need a clear agreement on who books the work, and we can quote for the whole system.
When the building owner and the occupier are different, it’s worth checking the lease for who maintains the systems. We’re happy to deal with either side and send the paperwork to whoever needs it.
Signs you need TR19 inspection in Tewin Wood
Not every section of a kitchen extract is easy to get to, and grease can be missed there clean after clean. A survey finds the sections that cannot be reached, so panels can be fitted.
The symptoms we are asked about most include:
- Systems cleaned on a calendar with no measurements
- Checking the result of a recent clean
- An insurer’s request for a TR19 audit
- Kitchens taken over with no cleaning records
School kitchens, at schools like Ridgeway Academy for example, are normally cleaned in the holidays so no lunches are lost.
What to look for in a quote
- Whether a survey comes first
- How VAT is shown on the quote
- Whether they’re fully insured
- Proof of accreditation you can verify