Surrey · TR19 inspections and grease testing
TR19 Inspection in Knaphill
TR19 inspection for Knaphill and the surrounding area: diagnosis first, then a fixed quote, the work and a report with photos. Ask us for a fixed quote.
- Missing access panels found on survey
- Pre-clean surveys before a first TR19 clean
- Uncertainty over how often to clean
TR19 inspection in Knaphill
A pre-clean survey is the diagnosis, and the clean is the treatment. We look at the system, take grease readings and photograph what we find, so the clean can be planned properly. If you have pre-clean surveys before a first TR19 clean and extracts that may be over the 200 micron mean, we can put it right, from post-clean checks, deposit thickness tests and wet film thickness tests onwards.
Size does not change the work: a kitchen in a place like Knaphill 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, 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.
- Where
- Knaphill (GU21, GU24)
- Wider area
- Surrey
- Reporting
- TR19® certificate and photo report
- Quotes
- Fixed quote, usually within a working day
- Hours
- When your site is closed, plus a 24/7 line
- Call
- 0345 646 2711
- Updated
- 30 October 2026
In-house cleaning or a specialist?
Logging matters as much as cleaning. A simple log of filter washes, wipe-downs and checks shows an inspector that the system is looked after between visits, alongside our reports.
Staff cleaning and specialist work aren’t the same thing. 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.
Grease, kitchens and Knaphill
There are about 25 restaurants, cafés and canteens and about 14 takeaways and sandwich shops within about 1.5 miles of central Knaphill, according to the Food Standards Agency’s register. Where they cook under a canopy, a grease reading is the way to tell whether the extract is due a clean. Knaphill sits within the area of Surrey 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. Kitchens in Knaphill get their food hygiene inspections from Woking council. 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.
Healthcare kitchens, like those at hospitals such as Brookwood Hospital (about within half a mile south), often cook for long hours, which puts them in BESA’s heavier-use bands. Volunteers running a hall kitchen near St Hugh of Lincoln's Church, or anywhere in Knaphill, may not know when the extract was last cleaned, and a grease test settles it.
Knaphill is about 2 miles west of Woking, in Surrey. Every kind of commercial site in Knaphill, we can take on TR19 inspection. Visits can be booked for evenings, overnight or weekends so trading is not interrupted. 395 places in Surrey are on our list, from busy centres to quieter spots.
Work in GU21 and GU24 follows the same survey, fixed quote and written report as everywhere else we cover. If you need TR19 inspection at premises on Wood Lane, High Street and Barnby Road or anywhere close by, we can help. Neighbouring places we cover for TR19 inspection include Bisley (1 mile north-west), Sheet's Heath (1 mile south-west), Castle Green (1 mile north), Brookwood (1 mile south-west) and Penny Pot (1 mile north). Larger places within reach include Guildford (5 miles south), Camberley (5 miles west), Epsom (15 miles east), Farnham (11 miles south-west), Egham (8 miles north) and Walton-on-Thames (10 miles north-east).
Around Knaphill
We work in commercial kitchens and buildings around Anchor Inn, The Winston Churchill School A Specialist Sports College and Brookwood Lye, among other places. The closest station to Knaphill is Brookwood station, about 1.4 miles south-west. Other landmarks nearby include The Peacocks (2.5 miles east) and Brookwood Hospital (under half a mile south). Open spaces near Knaphill include Brookwood Lye.
Also near Knaphill
More services for Knaphill
How we price TR19 inspection
Your quote is based on your site. We take into account:
- A single visit or a regular plan
- How many systems or sites are involved
- What state the system is in
- The scale of the work
Every site is different, so we price each one individually. Size, access, the condition of the system and when we can work all play a part.
Helping us quote
To help us quote quickly, please include:
- Your opening hours and when the area is out of use
- Any access panels or hatches you can see
- How we’d reach plant on a roof or in a plant room
- Where the site is and what kind of site it is
Photos are the quickest way to a quote: wide shots of the system, close-ups of anything that worries you and how we’d get to it. Add the site type and your opening hours, and we can price many jobs without a visit.
How it works
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. On site, it takes around an hour or two per canopy and duct system. For a place like Knaphill, we load the van from the survey notes so the work can be done in one visit where possible.
- After the clean, we arrange a time to check the system.
- The same access points are opened up.
- We repeat the WFTT or DTT readings.
- Photos are taken to show the condition after the clean.
- We report the findings and flag any areas that need more work.
Preparing for the visit
- Tell us the best time to work, such as after service or at a weekend
- Let us know about permits to work or site inductions
- Mention any parking or loading restrictions
Getting a quote
To get a fixed quote, phone us on 0345 646 2711 or use the quote form with the site type, your trading hours and a short description of the system. A few photos and your last certificate or report help a lot. You will normally have a quote within one working day.
Read more
Do you need TR19 inspection in Knaphill?
Not every section of a kitchen extract is easy to get to, and grease can be missed there clean after clean. A survey finds the sections that cannot be reached, so panels can be fitted.
If you notice any of these, it’s worth a diagnosis:
- Kitchen extract systems with no recent grease readings
- An insurer’s request for a TR19 audit
- Systems that need surveying before cleaning
- Post-clean verification after another contractor’s clean
School kitchens, at schools like Knaphill School for example, are typically cleaned in the holidays so no lunches are lost.
Questions to ask before booking
- Proof of accreditation you can verify
- Exactly which parts of the system are covered
- Whether the quote shows VAT
- Whether the work can be done while the site is closed
For landlords and multi-site operators
If you look after several sites, we can schedule visits across all of them on one quote. Every building has its own written report, so records stay tidy.
From a single site to a large estate, the standard is the same: a survey first, a fixed quote, the work timed around the site and a report with pictures.
Common questions in Knaphill
Which environmental health team covers Knaphill?
The local authority for Knaphill is Woking council, and its environmental health team does the inspecting. How often a business is inspected depends on the risk rating the council gives it, so it’s worth staying ready all year.
Can you clean school kitchen extracts in Knaphill during the holidays?
Yes, holiday work suits schools best. There are about 4 schools, colleges and universities on the FSA’s food hygiene register within about 1.5 miles of Knaphill. Booking early in the term gives the best choice of holiday dates.
How long does grease testing take?
An inspection takes a couple of hours for a typical kitchen extract system. Large or multiple systems take longer, so give us a ring on 0345 646 2711 or use the quote form and we will plan it.
Do we have to follow TR19 by law?
No. TR19® isn’t law; it’s BESA’s specification. The legal duty comes from the Regulatory Reform (Fire Safety) Order 2005, which requires the responsible person to reduce fire risk, and insurers, fire officers and EHOs look to TR19® as the benchmark.
Do you have a 24/7 line?
Yes, 24/7. Our office is open from 8am to 6pm on weekdays, with the emergency line covering every other hour.
Do you carry out TR19 audits for insurers?
Yes. Insurers often want evidence the extract is managed to TR19®, and an audit report gives you that, with recommendations where something needs doing.
What grease levels does TR19 allow?
Two figures matter: a mean of no more than 200 microns between cleans, and 500 microns at any single point, which needs immediate spot cleaning. Our report sets your readings against both.
Do you work out of hours?
Yes. Give us your opening hours with your enquiry and we will book around them.
What a clean will not put right
It’s worth knowing the limits before booking:
- Removing the grease, which is a separate clean
- Mechanical faults in the extract
- Sections with no access, until panels are fitted
If you’re not sure, just call us on 0345 646 2711 or use the quote form and we will give you a straight answer before you book.
What we work on in Knaphill
- Deposit thickness tests
- Post-clean checks
- Insurer audits
- Wet film thickness tests
- Pre-clean surveys
- Access surveys
Between visits
Looking after the system between visits is straightforward, and it makes the next visit easier:
- Flag oily drips near the extract
- Keep access panels clear and unpainted
- Clean or swap grease filters as often as the kitchen needs
- Tell us if menus or opening hours change
Where sections couldn’t be reached, the report says where access panels would help. Fitting them before the next clean means the whole system gets done.
Keep filters clean and in place. Missing or damaged filters let grease straight into the plenum.