Hertfordshire · Canopy and hood cleaning
Canopy Cleaning in Welwyn
Our technicians work in Welwyn on canopy cleaning. Out-of-hours visits, a fixed quote and a written report with pictures as standard.
- A plenum thick with grease behind the filters
- Wet, greasy drips from the hood
- Grease channels that no longer drain
Multi-site and managed buildings
Where a tenant occupies the premises but the landlord owns the building, it’s worth checking the lease for who maintains the systems. We are happy to deal with either side and send the paperwork to whoever needs it.
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.
Canopy cleaning in Welwyn, done properly
Canopy cleaning is part of every full TR19® Grease clean, but some sites need the canopy done between full cleans. In that case, the report makes clear what was and wasn’t cleaned, so your records stay accurate. The work covers baffle filters, plenum chambers and grease gutters, and the jobs we see most are heavy deposits behind the grease filters and condensation running down the canopy.
Around a smaller place like Welwyn, kitchen extracts tend to belong to pubs, cafés, takeaways and school or care home kitchens. Quieter kitchens still collect grease in the duct, just more slowly, so the interval is set by hours of use and grease readings.
Duct Doctor has been trading since 2009, as a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. CHAS, SafeContractor and ISO 9001 are in place too, and we’re fully insured.
- Place
- Welwyn (AL6)
- Wider area
- Hertfordshire
- Reporting
- Certificate and photo report
- Price
- A fixed quote up front
- Hours
- Evenings, overnight and weekends; 24/7 emergencies
- Phone
- 0345 646 2711
- Page updated
- 30 October 2026
What we are called out for in Welwyn
Air straight off the range hits the canopy first. Fat in that air settles on the inside of the hood, in its seams and on the filters, and the plenum behind them collects the rest.
The symptoms we’re asked about most include:
- Canopy gutters full of old fat
- A canopy that no longer draws the smoke away
- A sticky, discoloured canopy
- A canopy flagged at an environmental health inspection
Older buildings often hide long, awkward duct runs, and if you run a kitchen at a historic venue in the area (Digswell House is about 0.9 miles south-east), access may need planning.
What to look for in a quote
- What paperwork you get at the end
- Whether VAT is included
- If the quote is a fixed price or an estimate
- Exactly which parts of the system are covered
Welwyn kitchens: local notes
Food Standards Agency records list about 14 restaurants, cafés and canteens within roughly a mile and a half of the centre of Welwyn. Where they cook under a hood, the plenum behind the filters is where grease hides. Kitchens in Welwyn get their food hygiene inspections from Welwyn Hatfield council. The cleanliness of the kitchen and its equipment, extraction included, is part of what they check. A dated certificate in the maintenance file answers the question before it’s asked. Welwyn sits within the area of Hertfordshire Fire and Rescue Service. Its fire safety officers can audit commercial kitchens, and grease in the extract is part of a kitchen’s fire risk.
If you look after a school kitchen, at a school such as Monk's Walk School or anywhere near Welwyn, the holidays are the usual time for a TR19® clean. Healthcare kitchens cannot easily close, so their extracts are cleaned overnight or between meal services; the nearest hospital to Welwyn is Queen Elizabeth II Hospital, about 3.5 miles south.
Welwyn is about 2 miles north-west of Welwyn Garden City, in Hertfordshire. Whatever kind of site you run in Welwyn, we can take on canopy cleaning. Visits can be booked for evenings, overnight or weekends so trading isn’t interrupted. Across Hertfordshire, we cover 381 places, Welwyn among them. There’s also a page for London, roughly 23 miles from Welwyn.
Work in AL6 follows the same survey, fixed quote and written report as everywhere else we cover. Whether your site is on High Street, London Road and Mimram Place or a nearby road, our technicians can take on the work. If your site is just outside Welwyn, we cover Monkswood (1 mile south-east), Ayot St Peter (1 mile south-west), Ayot Green (1 mile south-west), Pottersheath (2 miles north) and Codicote (2 miles north-west). We also work in nearby towns such as Watford (14 miles south-west), Hemel Hempstead (12 miles south-west), Stevenage (6 miles north), St Albans (7 miles south-west), Harpenden (6 miles west) and Hitchin (9 miles north).
Near you in Welwyn
Typical jobs here are in premises near Stable Door pub, Danesbury Park and Homerswood Primary and Nursery School. The closest station to Welwyn is Welwyn North station, about 1.1 miles south-east of the centre. Other landmarks nearby include Queen Elizabeth II Hospital (3.5 miles south) and Datchworth Museum (2.7 miles north-east). The countryside around Welwyn includes Mardley Heath.
What affects the cost of canopy cleaning
The diagnosis comes before the price. The main factors are:
- Travel, parking and unloading
- The condition we find in the survey
- How big the system is
- The number of sites or systems
Working hours, access and the scale of the site all affect the cost. We take each of them into account and give you a fixed price before work begins.
Helping us quote
To help us quote quickly, please include:
- Any previous report or certificate
- Any access panels or hatches you can see
- Any symptoms, from odd noises to smells or leaks
- The roof, plant room or outside wall the system runs to
Every quote begins with a look at the system, either from pictures and details you send or from a site visit. Then we send a fixed price so you know the cost before any work starts.
What the work involves, part by part
School and staff canteen kitchens
Canteens and school kitchens tend to run to a timetable, so the canopy can be cleaned when the kitchen is closed. We often clean them in holidays or at weekends.
Pub and hotel kitchens
Pub and hotel kitchens can cook from breakfast to late evening. That is a lot of grease on the canopy, and canopy cleans between full cleans can help.
What canopy cleaning cannot fix
Not every problem is solved by canopy cleaning, and we’d rather say so up front. It will not put right:
- A canopy undersized for the equipment
- Bent or broken filters
- A light fitting that doesn’t work
If you’re not sure, just phone us on 0345 646 2711 or email us and we’ll give you a straight answer before you book.
Parts of the system we cover
- Canopy light fittings
- Island canopies
- Grease gutters
- Wall canopies
- Plenum chambers
- Baffle filters
What staff can safely do
Staff cleaning doesn’t replace a specialist visit; it supports it. Regular in-house cleaning slows the build-up, but hidden parts of the system still need specialist attention.
Keep a record of what your team does. A simple log of filter washes, wipe-downs and checks shows an inspector that the system is looked after between visits, next to our reports.
What happens on the day
Our technicians bring everything the work needs, from protective sheeting to tools and access equipment. You only need to give us clear access and switch off what needs to be off. The visit takes a few hours, depending on the size of the canopy and how much grease has built up. Getting to the system matters more than parking in a place like Welwyn, so let us know how to reach it.
- The canopy is checked from photos or on a visit.
- Once the kitchen has closed, the cooking line is cooled and sheeted.
- With the filters removed, the plenum and filter channels are cleaned.
- The canopy shell, seams, troughs and gutters are degreased inside and out.
- We put the filters back, tidy up and photograph the finished canopy.
Before we arrive
- Clear the space around the work
- Let us know about permits to work or site inductions
- Let us know when the site is closed or quiet
How to get a quote
Here’s what helps us quote: where the site is, what it is and its opening hours, pictures of the system and the last certificate or report, if there is one. Once you have those, ring 0345 646 2711 or use the quote form.
Related advice
Welwyn: your questions answered
Is Welwyn within the area you cover?
Yes. Villages and rural sites across the South East are part of our work, Welwyn included. Just mention lanes, gates or anything else about the site when you book.
Who enforces fire safety at workplaces in Welwyn?
It’s Hertfordshire Fire and Rescue Service, which covers Welwyn. Records of extract cleaning are a sensible thing to have ready if a fire safety officer carries out an audit.
What do you do with what you remove?
It leaves the site with us at the end of the visit. While we work, it’s kept contained so the area stays clean.
Are you insured?
Yes. We are fully insured, and the details are available on request.
Can I just have the canopy cleaned instead of the whole system?
On its own, a canopy clean is a useful extra rather than a full TR19 clean. We will make clear on the report which parts were cleaned so nobody mistakes it for a full system clean.
How long will it take to clean the canopy?
One lightly soiled hood doesn’t take long, but large or heavily soiled canopies take longer. We will tell you what to expect.
Which accreditations do you hold?
Our accreditations are CHAS, SafeContractor and ISO 9001, and we’re a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. Vent Hygiene Elite is run by BESCA and independently audited.
What’s TR19?
BESA’s ventilation hygiene specification in two main parts: TR19® Grease for kitchen extract systems and TR19® Air for general ventilation. It isn’t legislation, but it’s the standard people check against.