Hertfordshire · TR19 inspections and grease testing
TR19 Inspection in Northaw
Specialist TR19 inspection for Northaw: a survey, a fixed price, careful work and proper paperwork. Call for a fixed quote.
- Cleaning intervals that may not suit the kitchen
- Kitchen extract systems with no recent grease readings
- Insurers asking for TR19 evidence
TR19 inspection in Northaw
Before any clean in Northaw, we survey the canopy, plenum, filters, ducts, fan and discharge. Access is checked along the full length, and record grease readings at set points. The work covers pre-clean surveys, post-clean checks and access surveys, and the jobs we see most are missing access panels found on survey and sites with gaps in their extract records.
For a kitchen in or near Northaw, the visit is planned around opening hours and the journey, and the clean covers the whole system, as it would anywhere: canopy, filters, duct, fan and discharge, with a certificate and photo report at the end.
The report is your system’s health record: dated, with photos, and showing what was done. Grease extract cleans are also certificated to TR19® Grease through the BESCA VHE portal, ready for your insurer.
- Location
- Northaw (EN6)
- Region
- Hertfordshire
- Paperwork
- Certificate and photo report
- Quote
- A fixed price before any work starts
- Hours
- Evenings, overnight and weekends; 24/7 emergencies
- Call
- 0345 646 2711
- Reviewed
- 30 October 2026
Keeping the system healthy
A little care between visits keeps the system in better shape. Our advice:
- Flag oily drips near the extract
- Keep TR19 certificates, readings and reports together
- Keep access panels clear and unpainted
- Clean grease off the canopy between professional cleans
The audit report is set out to pass straight to your insurer or broker, including readings, pictures and any inaccessible sections.
Revisit the cleaning interval whenever the menu or hours change. Fresh readings show whether it needs to change.
What we’re called out for in Northaw
Menus, opening hours and cooking styles change over time, and more frying or longer hours mean more grease. A cleaning interval set years ago may no longer fit.
Any of these means the system needs a check-up:
- Uncertainty over how often to clean
- Insurance renewals needing proof of TR19 cleaning
- Extracts that may be over the 200 micron mean
- Kitchen extract systems with no recent grease readings
Bursars and site managers at schools such as Northaw Church of England Primary School tend to book extract cleaning for when the kitchen is empty.
Questions to ask before you book
- Which accreditations they hold, and whether you can check them
- Proof of insurance
- Whether the figure could change on the day
- Whether a survey comes first
Kitchen extracts in Northaw
The FSA’s food hygiene register shows about 14 restaurants, cafés and canteens and about 5 sandwich bars and takeaways across Northaw and its immediate surroundings (about a mile and a half). For any of them with a canopy, measuring grease is better than guessing when to clean. In Northaw, food businesses are inspected by environmental health officers from Welwyn Hatfield council. An officer looking round a kitchen will see the canopy, and grease there is hard to miss. Before-and-after photos from each clean are a simple way to show the extract is in hand. Northaw sits within the area of Hertfordshire Fire and Rescue Service. Its fire safety officers can audit commercial kitchens, and grease in the extract is part of a kitchen’s fire risk.
A hospital like Chase Farm Hospital, about 3.3 miles south-east, is the kind of site where a kitchen may cook for patients, staff and visitors all day. Where a hall near Parish Church of St Thomas A Becket, or anywhere in Northaw, hosts lunch clubs or events, its extract gathers grease just as a café’s does.
Northaw is about 2 miles north-east of Potters Bar, in Hertfordshire. We carry out TR19 inspection for commercial premises of every kind in Northaw and the rest of Hertfordshire. Our Hertfordshire coverage runs to 381 places, Northaw among them. Our London page covers sites nearby (14 miles or so).
Postcode districts we cover here for TR19 inspection: EN6. Whether your site is on Vineyards Road, Church Lane and Northaw Road West or a nearby road, our technicians can take on the work. Other places close to Northaw include Cuffley (1 mile east), Brookmans Park (2 miles north-west), Newgate Street (2 miles north-east), Bell Bar (2 miles north-west) and Little Berkhamsted (3 miles north). Further out, we also cover Watford (11 miles west), Hemel Hempstead (14 miles west), Stevenage (14 miles north), St Albans (8 miles west), Welwyn Garden City (7 miles north) and Harpenden (12 miles north-west).
What’s near Northaw
We work in commercial kitchens and buildings around Two Brewers Public House and Mount Grace School. Northaw’s nearest station is Cuffley station, roughly 1.6 miles east. Other landmarks nearby include Potters Bar Museum (2.1 miles west) and Chase Farm Hospital (3.3 miles south-east). The countryside around Northaw includes Fir and Pond Woods.
Towns and villages near Northaw
What else we do in Northaw
What a clean will not put right
It’s worth knowing the limits before booking:
- Fan breakdowns, which need a repair visit
- Ductwork that was designed or installed badly
- The grease itself, which needs a full or spot clean
If in doubt, ring 0345 646 2711 or email us and we’ll say what we think before you book.
What we work on in Northaw
- Access surveys
- Insurer audits
- Post-clean checks
- Pre-clean surveys
- Deposit thickness tests
- Wet film thickness tests
What happens on the day
On the day, we arrive at the time agreed with you, which is often after service, overnight or at a weekend. Anything that needs to be off for the work is switched off and left to cool before work begins, and the area around the work is covered and protected. The work itself takes around an hour or two per canopy and duct system. We agree a date with you, plan the drive to Northaw and turn up when the site is quiet.
- 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.
- We report the findings and flag any areas that need more work.
Preparing for the visit
- Tell us about site rules, permits or sign-in
- Let us know how we reach the system, including roofs, risers and plant rooms
- Tell us the best time to work, such as after service or at a weekend
How to get a quote
To help us quote: where the site is, what it is and its opening hours, photos of the system and any previous report or certificate. Once you have those, ring 0345 646 2711, or send details by email.
Read more
What affects the quote in Northaw
The quote reflects the site in front of us. We consider:
- Whether several sites go on one quote
- Travel, parking and unloading
- What state the system is in
- One-off work versus a regular cycle
Every site is different, so each one gets its own fixed quote. Size, access, the condition of the system and when we can work all make a difference.
What to send for a quote
Photos and a few facts are often enough to price the work. Useful things to send:
- Where the site is and what kind of site it is
- Where the plant sits or the system leaves the building, such as a roof or outside wall
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
- A few general shots of the system
For a fixed quote, call us on 0345 646 2711 or email us 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 typically have a quote within one working day.
Managing agents and facilities teams in Northaw
We regularly work with managing agents. Tell us the site, the work and the access arrangements and we’ll come back with a fixed quote.
Multi-site operators often want one contractor and one number. We work across London and the South East, so visits at different addresses can be planned together and kept on a regular cycle.
What staff can safely do
Keep a record of what your team does. A dated log of in-house cleaning and checks shows an inspector that the system is looked after between visits, alongside our reports.
In-house cleaning and specialist cleaning do different jobs. A daily filter wipe and a weekly filter wash keep grease down at the front of the system, but grease that has passed the filters is out of reach. That part needs specialist access and equipment.
Questions from Northaw
Which fire service covers Northaw?
Hertfordshire Fire and Rescue Service is the fire and rescue service for Northaw. Records of extract cleaning are a sensible thing to have ready if a fire safety officer carries out an audit.
Can you come to Northaw after we close?
Yes. We work evenings, overnight and at weekends. Your customers, staff or residents in Northaw needn’t be disturbed. Just call 0345 646 2711, or email photos with your opening times and we’ll plan around them.
What do the grease readings need to be?
TR19® Grease says the mean shouldn’t exceed 200 microns between cleans, and anywhere at 500 microns or more needs spot cleaning right away.
Can you look after several sites?
Yes. Tell us the addresses and what each needs and you will get one fixed quote.
What do you do to protect the area?
Floors and surfaces near the work are sheeted before any work starts, and waste is contained as we go. Before we leave, we tidy up and clean down.
What is TR19?
TR19® is the BESA specification for keeping ventilation systems clean. Since 2019, TR19® Grease has been a standalone specification for grease in kitchen extract systems, and TR19® Air covers general supply and extract systems.
How much does TR19 inspection cost in Northaw?
It depends on the site, so we quote each one individually. To get one, call 0345 646 2711 or use the quote form and tell us about the site and its opening hours.
What is grease thickness testing?
Grease thickness testing measures the layer of grease on the duct surfaces, using the Wet Film Thickness Test (WFTT) or Deposit Thickness Test (DTT). Each reading is recorded in microns.