Hertfordshire · TR19 inspections and grease testing
TR19 inspections and grease testing in Welham Green, Hertfordshire
We cover Welham Green for TR19 inspections and grease testing. Out-of-hours visits, a fixed quote and a written report with photos as standard.
- Heavy grease suspected in the plenum or ducts
- Kitchens whose menu or hours have changed
- Parts of the system left out of past cleans
Landlords, agents and facilities managers
If you look after several sites, we can plan visits across the whole estate and price them together. Each site gets its own report and pictures, so records stay tidy.
Landlords, managing agents and facilities managers book us, not only the businesses that use the systems. Where a system serves more than one tenant, such as a shared riser, it helps to agree who arranges the work, and we are happy to quote for all of it.
TR19 inspection in Welham Green, done properly
A grease test measures how thick the grease is inside a kitchen extract system. Readings are taken at set points using the Wet Film Thickness Test (WFTT) or the Deposit Thickness Test (DTT). The results show whether the system needs cleaning and how soon. If you have kitchens taken over with no cleaning records and ductwork where grease may be over the TR19 limits, we can put it right, from access surveys, pre-clean surveys and insurer audits onwards.
Size doesn’t change the work: a kitchen in a place like Welham Green gets the whole system cleaned, canopy to discharge. We plan the visit around your hours, with the journey sorted in advance.
Duct Doctor has been trading since 2009, and we are a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we’re fully insured.
- Where
- Welham Green (AL9, AL10)
- Region
- Hertfordshire
- Paperwork
- TR19® certificate and photo report
- Price
- A fixed quote up front
- Working hours
- After hours by arrangement; emergencies any time
- Call
- 0345 646 2711
- Last updated
- 30 October 2026
Keeping the system healthy
Think of this as the after-treatment advice, short and simple:
- Keep grease filters clean and fitted properly
- Share inspection reports with your insurer or broker when asked
- Book the next test on the date in the report
- Keep canopy edges and gutters wiped down
Readings of 500 microns or more are highlighted as needing immediate spot cleaning, and we can arrange it.
When cooking hours or the menu change, check the interval still fits. A quick grease test answers the question.
Common questions in Welham Green
Do you work at weekends in Welham Green?
Yes, we can come after you close and finish before you open. It means the site in Welham Green keeps running as normal. Your opening times are the first thing we ask for.
Who would carry out a food hygiene inspection at a kitchen in Welham Green?
Food hygiene inspections in Welham Green are carried out by Welwyn Hatfield council. An officer may look up into the canopy, so clean filters on the day and a recent certificate on file both help.
Which sectors do you work in?
Any commercial site with kitchens or ventilation, from a single café to a large school. We work with hotels, schools, care homes, offices, retail and leisure sites.
What happens on a pre-clean survey?
The survey covers the whole system, grease readings and access to each section. From it, we plan the clean and quote a fixed price.
Do you offer emergency callouts?
Yes. If something urgent happens, like a fan failing or damage after a fire, call our 24/7 line, and we’ll advise on what to do next.
What do you do to protect the area?
We cover floors and nearby surfaces with sheeting before we start, and anything we remove is contained. Before we leave, we tidy up and clean down.
How much does TR19 inspection cost?
Size, condition, access and working hours all affect the cost. Call for a fixed quote and we will usually reply within one working day.
How much notice do you need?
Book as early as you can for planned work, particularly if your next visit is nearly due. Emergencies are different, because our line is open 24/7.
How the visit works
A visit follows the same order every time: sheeting and protection first, make the system safe, carry out the TR19 inspection, tidy up and leave you the report. On site, the work takes anything from an hour for a small canopy and short duct to a good part of a day for a large site. Tell us when your site near Welham Green is quiet and the visit will be booked for then.
- First we book a time that won’t disrupt cooking.
- Every part of the system is examined, end to end.
- Grease thickness is measured at set points by WFTT or DTT.
- We photograph the test points and record any sections we can’t reach.
- We send a report setting out the readings, photos and next steps.
Before we arrive
- Mention any sign-in, permit or induction we need
- Move anything stored near the system
- Let us know when the site is closed or quiet
Get a fixed quote
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 we can price many jobs without a visit.
Related advice
Do you need TR19 inspection in Welham Green?
Not every section of a kitchen extract is easy to get to, so those sections can be skipped time and again. A survey finds the sections that cannot be reached, so panels can be fitted.
These are the problems we see most often:
- Uncertainty over how often to clean
- Surveys needed before quoting a full clean
- Kitchen extract systems with no recent grease readings
- An insurer’s request for a TR19 audit
Where a hall near Church of St Mary the Virgin, or anywhere in Welham Green, hosts lunch clubs or events, its extract gathers grease just as a café’s does.
Questions to ask before booking
- Whether the quote is based on a survey or photos
- Whether a written report and pictures are included
- Whether the whole system is included, or only the parts that are easy to reach
- Proof of accreditation you can verify
How the job changes from site to site
Schools, hospitals and care homes
Education kitchens need TR19 inspections like any other. Readings show if the interval is right.
Vertical risers
Vertical risers take the extract up through the floors. Grease can run down and collect at the base, so the base is a key test point.
Why it’s worth doing now in Welham Green
Sites in Welham Green that have never measured grease cannot tell whether their cleaning interval suits the kitchen. Measured readings let a competent person set the interval. When a site near Welham Green shuts unexpectedly, the people who rely on it notice at once.
Kitchens, offices, schools and hospitals are all priced the same way: the size of the job, access, condition and working hours. Call for a fixed quote and we will go through it with you.
Why book with us
- We diagnose before we treat
- Fully insured
- A fixed price before any work starts
- A single point of contact for sites across the South East and London
What TR19 inspection looks like in Welham Green
Look up Welham Green on the FSA’s food hygiene register and you’ll find about 19 cafés, restaurants and staff canteens and about 6 takeaways and sandwich shops within 1.5 miles or so of the middle of Welham Green. Where they cook under a canopy, a grease reading is the way to tell whether the extract is due a clean. Food hygiene inspections in Welham Green are the job of Welwyn Hatfield council’s environmental health team. They look at how clean the premises and equipment are, and the kitchen extract is part of that. Before-and-after pictures from each clean are a simple way to show the extract is in hand. The fire and rescue service for Welham Green is Hertfordshire Fire and Rescue Service. The Fire Safety Order puts the duty on whoever runs a kitchen to control its fire risk, and a greasy duct is fuel.
For kitchens close to Welham Green station, where the day often starts early and ends late, the extract can be cleaned overnight. If you look after a school kitchen, at a school such as St Mary's Church of England Primary School or anywhere near Welham Green, the holidays are the usual time for a TR19® clean.
Welham Green is about 2 miles south of Hatfield, in Hertfordshire. We carry out TR19 inspection for commercial premises of every kind in Welham Green and the rest of Hertfordshire. Our area takes in 381 places across Hertfordshire, from busy centres to quieter spots. We also work in London, around 17 miles away.
Here we cover the AL9 and AL10 postcode area for TR19 inspection. Streets in the area include Station Road, Old Farmhouse Mews and Vincenzo Close, and we cover them all for TR19 inspection. Neighbouring places we cover for TR19 inspection include North Mymms (1 mile south), Colney Heath (1 mile west), Hatfield (2 miles north), Sleapshyde (2 miles west) and Smallford (3 miles north-west). We also work in nearby towns such as Watford (9 miles south-west), Hemel Hempstead (10 miles west), Stevenage (12 miles north), St Albans (5 miles west), Welwyn Garden City (4 miles north) and Harpenden (8 miles north-west).
Landmarks near Welham Green
Locally, jobs take us to businesses close to Brookmans Park, The Hope and Anchor Public House and Chancellor's School, among other places. Welham Green has its own railway station: Welham Green station. Nearby you will also find Queen Elizabeth II Hospital (3.5 miles north) and The Bunker at Hatfield Police Station (2.3 miles north). Open spaces near Welham Green include Gobions Wood.
Nearby places to Welham Green
What else we do in Welham Green
What affects the quote in Welham Green
You will get a fixed price before we start. It’s based on:
- One-off work versus a regular cycle
- The condition we find in the survey
- Whether we need access equipment or extra panels
- How many systems or sites are involved
Leaving it longer rarely makes the work cheaper. Problems in a system tend to grow, which can make the next visit longer. If you are not sure what’s needed, call 0345 646 2711 or drop us a line for straight advice and a fixed quote.
Asking for a quote
Many jobs can be priced from pictures and some basics. Useful things to send:
- Any symptoms, from odd noises to smells or leaks
- Your opening hours and when the area is out of use
- The roof, plant room or outside wall the system runs to
- Where the site is and what kind of site it is
Photos are enough for some jobs, while others need a look on site. Larger sites, and anything hidden behind walls, ceilings or floors, are normally surveyed first. Either way, the quote is fixed before any work is booked.