Hertfordshire · TR19 inspections and grease testing

Benslow TR19 inspection

Our technicians work in Benslow on TR19 inspection. Out-of-hours visits, a fixed quote and a written report with photos as standard.

  • Kitchens taken over with no cleaning records
  • Ductwork where grease may be over the TR19 limits
  • Checking the result of a recent clean

TR19 inspection across Benslow

TR19 inspection in Benslow, done properly

Grease thickness testing tells you how much grease is sitting in the canopy, ducts and fan. 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 heavy grease suspected in the plenum or ducts and kitchens whose menu or hours have changed, we can help, from access surveys, insurer audits and pre-clean surveys onwards.

In a smaller place like Benslow, many kitchens sit in older buildings or later extensions, where the duct may cross a roof void or climb an outside wall. Flat runs collect grease and need proper access to clean.

The sign-off is always in writing: a dated report with pictures of the work, and for TR19® Grease cleans, a certificate issued through the BESCA VHE portal. Any parts we couldn’t reach are recorded on it too.

Place
Benslow (SG4, SG5)
Wider area
Hertfordshire
Reporting
TR19® certificate and photo report
Quote
A fixed quote up front
Hours
Nights, weekends or holidays to suit you
Call
0345 646 2711
Page updated
30 October 2026
Five Duct Doctor technicians in navy uniforms with the company vans

When it’s something else

An honest diagnosis matters more to us than a booking, so here’s what this work can’t put right:

  • Fan breakdowns, which need a repair visit
  • The legal duty, which stays with the responsible person
  • Installation problems, which fall under design guidance such as DW172

If you are not sure, just call 0345 646 2711 or send us an email and we will give you a straight answer before booking.

Parts of the system we cover

  • Post-clean checks
  • Pre-clean surveys
  • Insurer audits
  • Deposit thickness tests
  • Access surveys
  • Wet film thickness tests

What your team can do, and what needs us

A few tasks are always specialist work: opening up ductwork, cleaning fans, drop testing fire dampers and measuring grease need training, the right equipment and safe access. Leave those to us.

Day-to-day cleaning is something your team can do: wiping down canopy surfaces, cleaning filters and keeping a simple log. What they can’t safely do is clean inside the ductwork, the fan or the risers, which is where we come in.

Benslow kitchens: local notes

Food Standards Agency data counts about 94 restaurants, cafés and works canteens and about 37 takeaways and sandwich shops in Benslow and the streets around it, up to about 1.5 miles out. Kitchens like these cook for very different hours, and grease testing shows which extracts need cleaning soonest. Environmental health officers from North Hertfordshire council inspect food businesses in Benslow. Extraction counts as kitchen equipment, so its condition can come up on the day. Our report lists what was cleaned and when, which is useful to have ready. Benslow is covered by 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.

A kitchen near Hitchin station that serves breakfast and dinner can run its extract twelve hours or more, which shortens the cleaning interval. Bursars and site managers at schools such as William Ransom Primary School tend to book extract cleaning for when the kitchen is empty.

Benslow is about 1 mile east of Hitchin, in Hertfordshire. Sites in Benslow get the same service as everywhere we cover: diagnosis first, a fixed price, out-of-hours working where needed and a written report with photos. Our area takes in 381 places across Hertfordshire, large and small. For sites nearby, see our Milton Keynes page, about 22 miles away.

TR19 inspection in SG4 and SG5 is surveyed, quoted and booked the same way as anywhere else. Local streets include Water Lane, Riddy Lane and The Avenue, and we cover them all for TR19 inspection. Main roads around Benslow include the A505, which makes travel easy for TR19 inspection. Nearby, we also carry out TR19 inspection in Hitchin (1 mile west), Poets Estate (1 mile east), Walsworth (1 mile north-east), Bearton (1 mile north-west) and Westmill (1 mile north-west). Larger places within reach include Stevenage (5 miles south-east), St Albans (14 miles south), Welwyn Garden City (11 miles south), Harpenden (10 miles south), Hatfield (13 miles south) and Hertford (13 miles south-east).

Local landmarks in Benslow

Typical jobs here are in premises near St Mary's Church, Kingshott School and Hitchin Girls' School and the streets around them. Nearby too are The Albert pub (under half a mile north-west) and Butts Close (0.8 miles west). Benslow has its own railway station: Hitchin station. A little further out are Wymondley Castle (1.4 miles south-east) and Lister Hospital (2.8 miles south-east). Not far away are Markham's Hill and Purwell Ninesprings.

Map of Benslow © OpenStreetMap contributors

Multi-site and managed buildings

The Fire Safety Order 2005 puts the duty to manage fire risk on the responsible person, which may be the employer, owner, landlord, FM or managing agent. With shared responsibility, good records help everyone.

Managing agents often deal with us directly. Tell us the site, the work and the access arrangements, and we will send a fixed quote.

What the work involves, part by part

Vertical risers

Risers can be hard to get into. We record what can and cannot be reached.

Extract fan and discharge

Grease on the fan adds to wear. Readings show if it needs attention before the next clean.

Benslow questions

Can you come to Benslow after we close?

Yes, nights and weekends are routine for us. The site is handed back ready to open. Your opening times are the first thing we ask for.

Who is the fire and rescue service for Benslow?

Benslow is in the area of Hertfordshire Fire and Rescue Service. A recent cleaning certificate and a note of the next clean date show that grease in the extract is being managed.

What happens on a pre-clean survey?

We look at the system from canopy to discharge, take grease readings and check access. From it, we plan the clean and quote a fixed price.

What do the grease readings need to be?

TR19® Grease says grease should not go over a mean of 200 microns between cleans. Any reading of 500 microns or more needs immediate spot cleaning.

Do you work with multi-site operators?

Yes. Send the list of sites and the work at each and we’ll quote them together.

How do you protect the area?

By covering it before any work starts. The work is kept contained and leave the area clean.

Do you have a 24/7 line?

Yes, 24/7. Office hours are Monday to Friday, 8am to 6pm, and the emergency line covers the rest.

Can you verify a clean after it’s been done?

Verification means repeat readings and photos once the clean is done. Any areas that weren’t cleaned properly are flagged.

Do you need TR19 inspection in Benslow?

Records can go missing when a business changes hands or contractors. With no history, the current state of the extract is a guess.

What we’re most often called out for:

  • Sections of duct that can’t be reached
  • Insurers asking for TR19 evidence
  • Kitchens whose menu or hours have changed
  • Confirming a clean reached the whole system

If you run catering at a healthcare site, such as a hospital like Lister Hospital about 2.8 miles south-east, the extract may need cleaning more often than a part-time kitchen.

Before you book anyone

  • How areas they cannot reach will be recorded
  • What paperwork you get at the end
  • How VAT is shown on the quote
  • If they look at the system before pricing

Questions to ask before booking

Keeping the system healthy

After the visit, a few habits help the work last:

  • Flag oily drips near the extract
  • File every inspection report with your certificates
  • Keep the route to access panels clear
  • Diary the next grease test and clean

The report recommends when the system should next be cleaned and tested, from the measured grease and the kitchen’s hours.

Keep filters clean and in place. Gaps around filters let grease get past them.

The process

Protection comes first: sheeting goes over floors and surfaces close to the work. After that, the system is made safe and the work begins. It takes an hour or two for a single kitchen, longer for a large or complex system, and the area is cleaned down before we leave. For a site near Benslow, the work is booked around your opening hours, evenings and weekends included.

  1. After the clean, we arrange a time to check the system.
  2. The same access points are opened up.
  3. We repeat the WFTT or DTT readings.
  4. We photograph each area to record how it was left.
  5. We report the findings and flag any areas that need more work.

Preparing for the visit

  • Agree a time when the area can be out of use
  • Arrange a key holder or contact on site
  • Allow time for equipment near the work to be turned off and cool down

Getting a quote

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.

Get a quick quote

Advice

BESCA Vent Hygiene EliteMember, cleaning to BESA TR19® Grease
CHAS · SafeContractorISO 9001 and fully insured
Certificate and photo reportWith every clean
24/7 emergency calloutEvenings, nights and weekends
Since 2009South East England and London