Hertfordshire · TR19 inspections and grease testing
TR19 inspections in Nettleden
We cover Nettleden for TR19 inspections, grease thickness testing, pre-clean surveys and post-clean verification. Fixed quotes, work around your opening hours and photo reports on every job.
- Kitchens whose menu or hours have changed
- Extracts that have never been grease tested
- Sites with gaps in their extract records
TR19 inspection for kitchens and businesses in Nettleden
Post-clean verification is a check carried out once the cleaning is done, with new readings and photos of the cleaned areas. It gives you evidence of how the system was actually left. The work covers access surveys, deposit thickness tests and wet film thickness tests, and the jobs we see most are extracts that have never been grease tested and parts of the system left out of past cleans.
Somewhere as small as Nettleden, commercial kitchens are few: perhaps a pub, a school or care home kitchen, or a hall used for events. Each still has a canopy and duct that collect grease.
Our accreditations include CHAS, SafeContractor and ISO 9001, and we’re fully insured. We’re also a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, and we have been trading since 2009.
- Place
- Nettleden (HP1)
- Region
- Hertfordshire
- Paperwork
- Certificate plus before-and-after pictures
- Price
- A fixed quote up front
- When we work
- After hours by arrangement; emergencies any time
- Call
- 0345 646 2711
- Reviewed
- 30 October 2026
TR19 inspection in Nettleden: the local picture
Look up Nettleden on the FSA’s food hygiene register and you’ll find about 6 cafés, restaurants and staff canteens and about 3 takeaways and sandwich shops within roughly a mile and a half of the centre of Nettleden. Where they cook under a canopy, a grease reading is the way to tell whether the extract is due a clean. Nettleden 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. Food hygiene inspections in Nettleden are the job of Dacorum council’s environmental health team. Extraction counts as kitchen equipment, so its condition can come up on the day. A TR19® certificate and photo report after each clean gives you a record to show an inspector.
For schools such as Great Gaddesden Church of England Primary School, kitchen extract cleaning is normally booked for the holidays, when the canteen is closed. Volunteers running a hall kitchen near Church of St Lawrence, or anywhere in Nettleden, may not know when the extract was last cleaned, and a grease test settles it.
Nettleden is about 3 miles north-east of Berkhamsted, in Hertfordshire. Every kind of commercial site in Nettleden, we can take on TR19 inspection. We can work out of hours so trading isn’t interrupted. Across Hertfordshire, we cover 381 places, and Nettleden is one of them. You can also see our page for Milton Keynes, about 20 miles away.
Work in HP1 follows the same survey, fixed quote and written report as everywhere else we cover. We also cover Frithsden (1 mile south-west), Great Gaddesden (1 mile north-east), Potten End (1 mile south), Fields End (2 miles south) and Ashridge (2 miles north-west). Larger places within reach include Watford (10 miles south-east), Hemel Hempstead (3 miles south-east), St Albans (9 miles east), Welwyn Garden City (14 miles east), Harpenden (8 miles east) and Hatfield (12 miles east).
Near you in Nettleden
Typical jobs here are in premises near John F Kennedy Catholic School and the streets around them. For rail, the closest station is Berkhamsted station, roughly 2.2 miles south-west. Well-known places in the area include Hemel Hempstead Hospital (3.1 miles south-east). The countryside around Nettleden includes Long Deans.
What affects the cost of TR19 inspection
Before we fix a price, we need to know a few things. We check:
- How big the system is
- How many systems or sites are involved
- One-off work versus a regular cycle
- Site rules, permits and inductions
What you pay depends on how big the system is, the condition it’s in and how easy it is to reach. You get a fixed price before any work starts, so you know where you stand.
Asking for a quote
We can often survey from photos. The most useful are:
- The site address and the type of premises
- The paperwork from the last visit, if you have it
- Wide pictures of the system and the area around it
- Close-ups of filters, grilles, hatches or access panels
Getting a quote does not take long. 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.
How the job changes from site to site
Canopy and plenum
Behind the filters, the plenum catches plenty of grease. We take readings there and photograph it on every inspection.
Schools, hospitals and care homes
School and college kitchens still need their extract checked. Testing shows whether the interval suits.
What we do, step by step
The first job on site is protection: floors, worktops and anything near the work are covered. Then we make the system safe and start. It takes around an hour or two per canopy and duct system, and the area is cleaned down before we leave. If you can send photos, we can arrive in Nettleden knowing what to expect.
- We agree a time when the kitchen is closed or quiet.
- We look over the canopy, plenum, ducts, fan and discharge.
- Grease thickness is measured at set points by WFTT or DTT.
- Each test point and any access problems are photographed.
- We send a report setting out the readings, photos and next steps.
Preparing for the visit
- Allow time for equipment near the work to be turned off and cool down
- Tell us about site rules, permits or sign-in
- Make sure someone can let us in and lock up afterwards
Ask for a quote
Photos are the quickest way to a quote: the system from a couple of angles, plus any access panels or hatches. Add the site type and your opening hours, and we can price many jobs without a visit.
Read more
Keeping the system healthy
How long the results last depends on use and care. We suggest:
- Don’t box in or cover duct access panels
- Wipe the canopy surfaces regularly
- Keep to the recommended interval
- Never cook with filters missing
The report recommends when the system should next be cleaned and tested, based on the readings and how the kitchen is used.
Revisit the cleaning interval whenever the menu or hours change. Fresh readings show whether it needs to change.
Staff cleaning versus specialist work
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’ll take a look and give you a fixed quote.
Day-to-day cleaning is something your team can do: wiping canopies, washing grease filters and recording it in a log. What they cannot safely do is clean inside the ductwork, the fan or the risers, and that’s where we come in.
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 are happy to quote for all of it.
If you look after several sites, we can schedule visits across all of them on one quote. Each site gets its own report and pictures, so records stay tidy.
Towns and villages near Nettleden
What else we do in Nettleden
Nettleden questions
Can you come to Nettleden after we close?
Yes. We work evenings, overnight and at weekends. The site is handed back ready to open. Your opening times are the first thing we ask for.
Do you clean school canteen extracts around Nettleden out of term?
Yes, and it’s the easiest time to do it. There are about 3 schools, colleges and universities on the FSA’s food hygiene register within about 1.5 miles of Nettleden. Just phone us on 0345 646 2711 or drop us a line with your term dates and we’ll plan around them.
How much notice do you need?
The more notice, the better, particularly for night and weekend visits. We normally quote within one working day, and emergencies are covered by our 24/7 line.
Is Nettleden in your area?
Yes. Our area takes in London and the counties of South East England, Nettleden included.
What is a WFTT or DTT grease test?
Grease thickness testing measures the layer of grease on the duct surfaces, by WFTT or DTT. The results are given in microns.
Are you accredited?
Our accreditations are CHAS, SafeContractor and ISO 9001, alongside BESCA Vent Hygiene Elite membership, cleaning to BESA TR19® Grease. Vent Hygiene Elite is run by BESCA and independently audited.
Do you work with multi-site operators?
Yes. Tell us the addresses and what each needs and you will get one fixed quote.
What does TR19 mean?
It’s BESA’s specification and the benchmark insurers, fire officers and EHOs look to. It sets out inspection, cleaning and record keeping, and it takes a risk-based approach.
What we are called out for in Nettleden
Grease in a duct is flammable fuel. Flames from the range can be pulled into the canopy and travel through the ducts to other parts of the building. Knowing how much there is lets you act before it becomes a hazard.
Signs it’s time to call us include:
- Post-clean verification after another contractor’s clean
- Sections of duct that can’t be reached
- Heavy grease suspected in the plenum or ducts
- Systems cleaned on a calendar with no measurements
Healthcare kitchens, like those at hospitals such as Hemel Hempstead Hospital (about 3.1 miles south-east), often cook for long hours, which puts them in BESA’s heavier-use bands.
Comparing quotes
- When the next visit should be, and why
- If the quote is a fixed price or an estimate
- Exactly which parts of the system are covered
- Whether they’re fully insured