Hertfordshire · TR19 inspections and grease testing
TR19 Inspection in Gosmore
Specialist TR19 inspection for Gosmore: a survey, a fixed price, careful work and proper paperwork. Ask us for a fixed quote.
- Checking the result of a recent clean
- An insurer’s request for a TR19 audit
- Extracts that have never been grease tested
How we handle TR19 inspection in Gosmore
TR19® Grease says grease should not exceed a mean of 200 microns between cleans, while a reading of 500 microns or more anywhere calls for immediate spot cleaning. Testing is how you know where your system stands. Common call-outs are for systems cleaned on a calendar with no measurements and missing access panels found on survey, across pre-clean surveys, access surveys and post-clean checks.
In a small place like Gosmore, kitchens are often in older or extended buildings, with long single-storey duct runs, and those horizontal sections are where grease settles. Access, parking and timings are agreed before the day.
Duct Doctor has been trading since 2009, as a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we’re fully insured.
- Location
- Gosmore (SG4)
- Wider area
- Hertfordshire
- Paperwork
- Certificate and photo report
- Quotes
- Fixed quote, usually within a working day
- Working hours
- Nights, weekends or holidays to suit you
- Phone
- 0345 646 2711
- Page updated
- 30 October 2026
What we do, step by step
We turn up at the time agreed with you, which is often after service, overnight or at a weekend. Equipment that has to be off is switched off and allowed to cool before any work starts, and the area around the work is covered and protected. On site, it takes an hour or two for a single kitchen, longer for a large or complex system. If the van will struggle with a lane or gateway near Gosmore, let us know and we will plan around it.
- After the clean, we arrange a time to check the system.
- The same access points are opened up.
- Grease readings are taken again at set points.
- We photograph each area to record how it was left.
- We report the findings and flag any areas that need more work.
Before we arrive
- Plan for cooking equipment or plant to be off before we arrive
- Have your last certificate or report to hand
- Mention any sign-in, permit or induction we need
Get a fixed quote
Quotes are quick. Send a few details and photos, and we typically reply with a fixed quote within one working day. Where a survey is needed, we arrange a time that suits the site.
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Places near Gosmore
What else we do in Gosmore
Landlords, agents and facilities managers
From a single site to a large estate, you get the same standard: the system surveyed, the price fixed, the visit fitted around trading and everything written up afterwards.
For anyone managing more than one site, we can schedule visits across all of them on one quote. Each site gets its own report and photos, so each one has its own record.
When something else is needed
Before you book, it helps to know what’s not included:
- Fan breakdowns, which need a repair visit
- Fire safety duties beyond the extract system
- The grease itself, which needs a full or spot clean
If in doubt, give us a ring on 0345 646 2711 or email us and we will say what we think.
What the work covers
- Deposit thickness tests
- Post-clean checks
- Pre-clean surveys
- Insurer audits
- Wet film thickness tests
- Access surveys
Part by part
Vertical risers
Access to risers is often limited. We record what can and cannot be reached.
Canopy and plenum
The plenum behind the filters can carry a lot of grease. Readings and pictures are taken in the plenum on every inspection.
Keeping the system healthy
After the visit, a few habits help the work last:
- Flag oily drips near the extract
- Keep access panels clear and unpainted
- Store grease readings where your insurer can see them
- Never cook with filters missing
The audit report is set out to pass straight to your insurer or broker, with readings, photos and any areas not accessible.
Keep all TR19 records together so you can produce them quickly.
Kitchen extracts in Gosmore
The FSA’s food hygiene register includes about 30 bars, pubs and nightclubs and about 4 hotels and B&Bs across Gosmore and its immediate surroundings (about a mile and a half). Breakfasts, bar meals and functions all put grease into the extract wherever they’re cooked. Hertfordshire Fire and Rescue Service covers Gosmore. In most workplaces, including commercial kitchens, it’s the fire and rescue authority that enforces the Fire Safety Order. Environmental health officers from North Hertfordshire council inspect food businesses in Gosmore. Extraction counts as kitchen equipment, so its condition can come up on the day. A dated certificate in the maintenance file answers the question before it’s asked.
If you run a church or community hall kitchen, near Church of St Ippolyts (church of England) or elsewhere in Gosmore, its extract still collects grease from every lunch and event. If your kitchen is in a listed or historic building, like the houses around Gosmore (Knebworth House is about 4.7 miles south-east), fitting access panels needs care.
Gosmore is about 1 mile south of Hitchin, in Hertfordshire. Every kind of commercial site in Gosmore, we can take on TR19 inspection. Visits can be booked for evenings, overnight or weekends so trading isn’t interrupted. Our area takes in 381 places across Hertfordshire, large and small. There’s also a page for Milton Keynes, roughly 22 miles from Gosmore.
Postcode districts we cover here for TR19 inspection: SG4. We cover sites on London Road, Mill Lane and Orchard Close and nearby roads. We also cover St Ippolyts (1 mile east), St Ibbs (1 mile south-east), Sperberry Hill (1 mile south-east), Charlton (1 mile north-west) and Little Almshoe (1 mile south-east). Further out, we also cover Hemel Hempstead (15 miles south-west), Stevenage (4 miles south-east), St Albans (13 miles south), Welwyn Garden City (10 miles south), Harpenden (9 miles south-west) and Hatfield (12 miles south).
What’s near Gosmore
In Gosmore, that means kitchens and buildings near St Mary's Church, Butts Close and The Bird in Hand pub. You will also find Hitchin Girls' School (1.1 miles north) and Kingshott School (0.8 miles north-east). For rail, the closest station is Hitchin station, about 1.5 miles north of the centre. Well-known places in the area include North Hertfordshire Museum (1.3 miles north) and Wymondley Castle (1.7 miles east). Not far away are Markham's Hill and Purwell Ninesprings.
When to call us in Gosmore
Grease builds up as cooking vapour cools inside the extract. The thickest layers can sit out of sight in the plenum, at bends and along flat runs.
These are the problems we see most often:
- Missing access panels found on survey
- Uncertainty over how often to clean
- Confirming a clean reached the whole system
- Pre-clean surveys before a first TR19 clean
Bursars and site managers at schools such as St Ippolyts Church of England Aided Primary School tend to book extract cleaning for when the kitchen is empty.
Comparing quotes
- What records you will receive afterwards
- Whether they recommend a next date
- Whether the price is fixed
- Whether the quote shows VAT
Gosmore questions
Do you work at weekends in Gosmore?
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.
Who would carry out a food hygiene inspection at a kitchen in Gosmore?
Food hygiene inspections in Gosmore are carried out by North Hertfordshire council. Have your latest TR19® certificate and photo report to hand, as an officer may ask how the extract is maintained.
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.
What types of premises do you cover?
Any commercial site with kitchens or ventilation, from a small pub to a hospital. Hotels, schools, care homes, offices, shops and leisure sites are all part of our work.
What do you do to protect the area?
We cover floors and nearby surfaces with sheeting before work begins, and anything we remove is contained. Before we leave, we tidy up and clean down.
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.
Can you quote from pictures?
Typically, yes. Send wide shots, close-ups of any access panels and anything that worries you, and we typically come back within one working day. If pictures are not enough, we will survey first.
Can you verify a clean after it’s been done?
After a clean, we take new readings and photos to show how the system was left. It can follow our own cleans or another contractor’s.
What affects the cost of TR19 inspection
The diagnosis comes before the price. We look at:
- How many systems or sites are involved
- Site rules, permits and inductions
- Parking and loading at the site
- When the work can happen, such as evenings, overnight or weekends
Several systems or sites on one quote often makes better use of the time. Tell us about everything you’d like looked at, and you will get one fixed quote.
Helping us quote
There’s no need for technical detail. Just send:
- When the site is open and when it’s quiet
- Close-ups of filters, grilles, hatches or access panels
- The roof, plant room or outside wall the system runs to
- A few general shots of the system
The quickest way to a quote is to send pictures: 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.