Hertfordshire · TR19 inspections and grease testing
TR19 inspections in Chipperfield
For TR19 inspections and grease testing in Chipperfield, one call is all it takes, from survey to sign-off. CHAS and SafeContractor accredited, ISO 9001 and fully insured.
- An insurer’s request for a TR19 audit
- Extracts that may be over the 200 micron mean
- Parts of the system left out of past cleans
TR19 inspection in Chipperfield, done properly
Insurance policies often require evidence of TR19® cleaning and inspection. Missing records can lead to a claim being reduced or refused. A TR19 audit sets out the system’s condition, with readings and pictures, for sites in Chipperfield and the rest of Hertfordshire. The work covers deposit thickness tests, post-clean checks and wet film thickness tests, and people most often call us about kitchens whose menu or hours have changed and extracts that have never been grease tested.
Somewhere as small as Chipperfield, 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.
Good records are part of the job. You get a written report with pictures after each visit, listing what was done, anything we couldn’t reach and when the next visit is due. File it in your maintenance log so it’s to hand when an insurer or inspector asks.
- Where
- Chipperfield (WD4, WD3)
- Region
- Hertfordshire
- Records
- TR19® certificate and photo report
- Price
- A fixed price before we start
- Hours
- Out of hours as standard, 24/7 emergency line
- Telephone
- 0345 646 2711
- Checked
- 30 October 2026
What happens if it’s left?
Sites in Chipperfield that have never measured grease cannot tell whether their cleaning interval suits the kitchen. Measured readings let a competent person set the interval. Our emergency line runs 24/7, but a planned visit to Chipperfield is calmer for everyone.
Several systems or sites on one quote can make for a more efficient booking. Tell us about everything you’d like looked at, and you’ll get one fixed quote.
What you get with us
- A written report with pictures after every visit
- Ventilation hygiene specialists since 2009
- Fixed quotes, typically within one working day
- A single point of contact for sites across the South East and London
Read what affects the cost or our accreditations and certificates.
What a clean won’t put right
Before booking, it helps to know what’s not included:
- A faulty or failing extract fan
- The legal duty, which stays with the responsible person
- Heavy deposits found on test, which still need cleaning
If in doubt, ring 0345 646 2711 or email us and we will say what we think before booking.
What the work covers
- Deposit thickness tests
- Pre-clean surveys
- Insurer audits
- Wet film thickness tests
- Post-clean checks
- Access surveys
Chipperfield questions
Who inspects food businesses in Chipperfield?
Kitchens in Chipperfield are inspected by Dacorum council’s environmental health officers. How often a business is inspected depends on the risk rating the council gives it, so it’s worth staying ready all year.
Which fire service covers Chipperfield?
It’s Hertfordshire Fire and Rescue Service, which covers Chipperfield. Records of extract cleaning are a sensible thing to have ready if a fire safety officer carries out an audit.
Which kinds of sites do you work on?
We work for restaurants, pubs, hotels, schools, colleges, hospitals, care homes, offices and shops, as well as food production and leisure sites.
Do you work out of hours?
Yes, and it’s often the best time. We book the visit for when the area is out of use, such as late evening, overnight or a weekend.
How often should grease be tested?
Each report recommends when to test and clean next, taking the readings and the kitchen’s hours into account. The interval should come from a competent person’s risk assessment backed by grease measurement.
What accreditations do you have?
Duct Doctor is 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.
How much notice do you need?
For planned work, earlier is better, especially if the next clean or test is due soon. For emergencies, we take calls 24/7.
Do you work with multi-site operators?
Yes. Tell us the addresses and what each needs and you’ll get one fixed quote.
Aftercare tips
Simple habits between visits make a real difference. Our advice:
- Clean grease off the canopy between professional cleans
- Look out for grease drips round the canopy edge
- Keep grease filters clean and fitted properly
- Keep TR19 certificates, readings and reports together
The audit report is set out to pass straight to your insurer or broker, with readings, pictures and any areas not accessible.
Keep filters clean and in place. Gaps around filters let grease get past them.
Towns and villages near Chipperfield
Other services in Chipperfield
In-house cleaning or a specialist?
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. Reaching it takes a specialist with the right equipment.
Logging matters as much as cleaning. A dated log of in-house cleaning and checks shows an inspector that the system is looked after between visits, next to our reports.
What the work involves, part by part
Horizontal duct runs
Grease can gather thickly at bends and along long runs, well away from where anyone looks.
Extract fan and discharge
The extract fan and its housing collect grease too. They’re included in the readings and photos.
What TR19 inspection looks like in Chipperfield
The FSA’s food hygiene register includes about 7 pubs, bars and clubs in and around Chipperfield, up to about a mile and a half out. A pub or hotel kitchen that cooks every day builds up grease in its extract like any other. Fire safety in Chipperfield falls to Hertfordshire Fire and Rescue Service. Grease in a kitchen extract is a recognised fire risk, and the fire authority enforces the law on managing it in most commercial premises. Environmental health officers from Dacorum council inspect food businesses in Chipperfield. Extraction counts as kitchen equipment, so its condition can come up on the day. Before-and-after photos from each clean are a simple way to show the extract is in hand.
Historic houses near Chipperfield, such as Chenies Manor House about 2.9 miles south-west, are a reminder that older buildings with event kitchens can have long, awkward duct routes. Volunteers running a hall kitchen near Church of St Paul, or anywhere in Chipperfield, may not know when the extract was last cleaned, and a grease test settles it.
Chipperfield is about 3 miles south of Hemel Hempstead, in Hertfordshire. Sites in Chipperfield get the same service as everywhere we cover: diagnosis first, a fixed price, out-of-hours working where necessary and a written report with photos. Chipperfield is one of 381 places in Hertfordshire we cover for commercial clients. We also work in London, about 22 miles from Chipperfield.
Work in WD4 and WD3 is surveyed, quoted and booked the same way as anywhere else. You will find streets such as The Street, Alexandra Road and Chapel Croft, all of which we cover for TR19 inspection. If your site is just outside Chipperfield, we cover Whippendell Bottom (1 mile east), Rucklers Lane (2 miles north-east), Kings Langley (2 miles east), Felden (2 miles north-east) and Apsley (2 miles north-east). Within a short drive, we also cover Watford (5 miles south-east), Hemel Hempstead (3 miles north), St Albans (8 miles north-east), Welwyn Garden City (14 miles north-east), Harpenden (10 miles north-east) and Hatfield (12 miles east).
Local landmarks in Chipperfield
Typical jobs here are in premises near Two Brewers Inn, among other places. For rail, the closest station is Apsley station, roughly 2.1 miles north-east. Well-known places in the area include Hemel Hempstead Hospital (3.1 miles north). The countryside around Chipperfield includes Sarratt Bottom nature reserve.
How it works
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. From there, it takes a morning or less for one kitchen, more where there are several systems. We agree a date with you, plan the drive to Chipperfield and turn up when the site is quiet.
- First we look at the system’s cleaning history, if there is one.
- We follow the extract from canopy to discharge.
- Access panels are located and any missing ones noted.
- We measure the grease and photograph each point.
- You get a report and a fixed quote for the clean.
How to prepare
- Tell us where we can park and unload
- Tell us the best time to work, such as after service or at a weekend
- Name a contact who can let us in at the agreed time
How to get a quote
The quickest way to a quote is to send photos: wide shots of the system, close-ups of anything that worries you and how we’d get to it. Tell us what kind of site it is and when it’s open, and many jobs can be priced from that alone.
Related advice
Common problems we fix in Chipperfield
Grease is fuel. Flames from the range can be pulled into the canopy and travel through the ducts to other parts of the building. Measuring it is the first step to keeping it under control.
What we’re most often called out for:
- Post-clean verification after another contractor’s clean
- Kitchen extract systems with no recent grease readings
- Insurers asking for TR19 evidence
- Ductwork where grease may be over the TR19 limits
Healthcare kitchens, like those at hospitals such as Hemel Hempstead Hospital (about 3.1 miles north), often cook for long hours, which puts them in BESA’s heavier-use bands.
What your quote should include
- If the quote is a fixed price or an estimate
- Whether inaccessible sections are listed on the report
- Whether VAT is included
- Whether they recommend a next date