Hertfordshire · Ductwork cleaning
Duct cleaning in Colney Street
Ductwork cleaning in Colney Street from ventilation hygiene specialists trading since 2009. Out-of-hours visits and 24/7 emergency callout.
- A grease test showing the duct is overdue
- Grease pooling at the foot of the riser
- Sections of duct with no access panels
What we’re called out for in Colney Street
Grease filters that do not seal let fat straight through. The duct then takes grease that the filters should have stopped, and build-up speeds up.
Common reasons sites call us include:
- Fat dripping from the ductwork
- Readings above 200 microns from a grease thickness test
- Gaps where access panels were never fitted
- Ductwork that has never been cleaned
Kitchens that cook twelve hours or more a day, as some healthcare kitchens do, fall into BESA’s three-monthly minimum; Kingsley Green is the nearest hospital to Colney Street, about 1 mile east.
Questions to ask before booking
- How VAT is shown on the quote
- Which accreditations they hold, and whether you can check them
- How areas they cannot reach will be recorded
- If they look at the system before pricing
Ductwork cleaning in Colney Street
Many ducts were installed with too few access doors. TR19 calls for any section we couldn’t reach to be recorded, and we can fit new access panels so it’s cleaned next time. An honest report beats a guess. The work covers vertical risers, horizontal duct runs and multi-storey ducts, and people most often call us about high readings at a recent grease test and a duct nobody has opened in years.
Rural kitchens often have long, low duct runs through a roof space or along an outside wall, where grease settles in the flat sections. Access, parking and timings are agreed before the day.
Nothing is signed off by word of mouth: a written report, dated and illustrated with pictures, plus a certificate through the BESCA Vent Hygiene Elite portal when the work is a TR19® Grease clean. It shows what was done and what, if anything, couldn’t be reached.
- Where
- Colney Street (AL2, WD7)
- Wider area
- Hertfordshire
- Paperwork
- Certificate and photo report
- Quotes
- A fixed price before any work starts
- When we work
- Overnight and weekend work, 24/7 emergency callout
- Call
- 0345 646 2711
- Page updated
- 30 October 2026
What affects the quote in Colney Street
Some jobs are bigger than they look, and some smaller. The main factors:
- Any permits to work or inductions
- The scale of the work
- The condition we find in the survey
- How easy every part is to reach
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 unsure, call 0345 646 2711, or email photos for straight advice and a fixed quote.
What we need to know
When you call or email, these details help:
- Any access panels or hatches you can see
- The times we could work without disrupting the site
- The site address and the type of premises
- How we’d reach plant on a roof or in a plant room
Quoting starts with a diagnosis, either from pictures and details you send or from a site visit. After that, you get a fixed price for the work so you know the cost before work begins.
What happens if it’s left?
Fire inside a duct is out of sight and out of reach. It can travel through the ductwork to other parts of the building, which is why the duct matters as much as the canopy. Systems in rural buildings are often out of sight and out of mind.
What you pay depends on how big the system is, the condition it’s in and how easy it is to reach. We give you a fixed price before work begins, so there are no surprises.
Why us?
- We’re fully insured
- CHAS, SafeContractor and ISO 9001
- Survey first, then a fixed quote
- A BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
Take a look at how cleaning jobs are priced and how to check a contractor.
Places near Colney Street
Also in Colney Street
What the work involves, part by part
Attenuators and discharge
Attenuators, where fitted, quieten the extract, and their linings can soak up grease. We clean what can be reached and note anything that can’t.
Horizontal duct runs
Grease settles on the floor of a flat duct run. Thick deposits are scraped out by hand before degreasing, then the walls and roof are cleaned too.
What ductwork cleaning can’t fix
We’d rather tell you now than book work that will not help, so here are the limits:
- Ductwork that’s corroded, split or holed (that needs a ductwork contractor)
- A worn-out fan that needs replacing
- A damper stuck open in the duct
If you are not sure, just phone us on 0345 646 2711 or email us and we will give you a straight answer before booking.
What we work on in Colney Street
- Multi-storey ducts
- Attenuators
- Bends and junctions
- Vertical risers
- Access panels
- Horizontal duct runs
Your questions about ductwork cleaning in Colney Street
Can you clean school kitchen extracts in Colney Street during the holidays?
Yes, holiday work suits schools best. There are about 5 schools, colleges and universities on the FSA’s food hygiene register within about 1.5 miles of Colney Street. You can ring 0345 646 2711, or send details by email with the dates the site is empty.
Who would carry out a food hygiene inspection at a kitchen in Colney Street?
In Colney Street, it’s St Albans City council that carries out food hygiene inspections. Ratings are published by the Food Standards Agency, so a clean extract and good records are worth keeping up.
Do you have a 24/7 line?
Yes. There’s a 24/7 emergency line for anything that cannot wait until a planned visit. Ring any time and tell us what’s happened.
Will I get a report after the ducts are cleaned?
A photo report, with readings and before and after pictures, plus a TR19 certificate for a full system clean. The report says when the next clean is due.
Which sectors do you work in?
We work for restaurants, pubs, hotels, schools, colleges, hospitals, care homes, offices and shops, plus food production and leisure sites.
What’s involved in cleaning extract ducts?
We open each access panel and clean the section it reaches. Heavy grease comes out by hand, and what’s left is degreased, with readings taken before and after.
Are you accredited?
Duct Doctor is a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. CHAS, SafeContractor and ISO 9001 are in place too, and we are fully insured.
How much does ductwork cleaning cost in Colney Street?
We don’t publish prices, because the cost depends on the job: the size of the system, its condition, access and when we can work. You get a fixed price before any work starts.
Keeping the system healthy
Results last longer with the right care. Here’s what we suggest:
- Tell us if grease leaks from the ductwork
- Book the next clean before the recommended date
- Store the certificate with the fire risk assessment
- Keep access panels clear of stored items
File the paperwork in the maintenance log. It’s the evidence an insurer or inspector may ask for, and the photos make the duct’s condition easy to see.
Book the next duct clean before the date passes. A change in cooking hours may change the interval under BESA guidance, and grease thickness testing will show it.
How the visit works
Your trading hours come first. Most visits are booked for when the area is out of use, such as evenings, overnight, early mornings or weekends. Once we are in, the area is sheeted and anything that has to be off is turned off and cooled, and the work takes anything from a few hours to several visits, depending on the length of duct. If the van will struggle with a lane or gateway near Colney Street, let us know and we will plan around it.
- We start by working out how the duct runs and where it can be opened.
- Set points along the runs are tested for grease.
- We open the panels and scrape out the heaviest grease.
- Horizontal runs and risers are then degreased by the method that suits the deposit.
- We test again, take photos and note any part that couldn’t be reached.
Getting ready for the visit
- Mention any locked doors, roof access or ceiling voids
- Tell us about site rules, permits or sign-in
- Name a contact who can let us in at the agreed time
How to get a quote
To get a fixed quote, phone us on 0345 646 2711 or email us with the site type, your trading hours and a short description of the system. A few pictures and your last certificate or report help a lot. You’ll usually have a quote within one working day.
Advice
Ductwork cleaning in Colney Street: the local picture
According to Food Standards Agency records, there are about 7 bars, pubs and nightclubs within 1.5 miles or so of the middle of Colney Street. A pub or hotel kitchen that cooks every day builds up grease in its extract like any other. It’s St Albans City council that sends environmental health officers to food businesses in Colney Street. The cleanliness of the kitchen and its equipment, extraction included, is part of what they check. Keeping each certificate and photo report on file helps show the extract is looked after. Colney Street is covered by 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.
For schools such as Park Street Church of England Voluntary Aided Primary School, kitchen extract cleaning is typically booked for the holidays, when the canteen is closed. If you run a church or community hall kitchen, near Church of the Holy Trinity or elsewhere in Colney Street, its extract still collects grease from every lunch and event.
Colney Street is about 3 miles south of St Albans, in Hertfordshire. From the centre of Colney Street to the outskirts, ductwork cleaning is available to all kinds of commercial premises, from small sites to large estates. Our Hertfordshire coverage runs to 381 places, and Colney Street is one of them. London is in our area too, about 18 miles from Colney Street.
Here we cover the AL2 and WD7 postcode area for ductwork cleaning. We cover sites on Old Parkbury Lane, Ventura Park and Radlett Road and nearby roads. Other places close to Colney Street include Frogmore (1 mile north-west), Park Street (1 mile north-west), How Wood (1 mile north-west), Bricket Wood (2 miles west) and Chiswell Green (2 miles north-west). We also work in nearby towns such as Watford (4 miles south-west), Hemel Hempstead (6 miles north-west), Stevenage (15 miles north-east), St Albans (3 miles north), Welwyn Garden City (8 miles north-east) and Harpenden (8 miles north).
Local landmarks in Colney Street
Typical jobs here are in premises near The George and Dragon Public House and Samuel Ryder Academy, among other places. Colney Street’s nearest station is How Wood station, about 1 mile north-west of the centre. Nearby you’ll also find Kingsley Green (1 mile east) and The Maltings (2.9 miles north). The countryside around Colney Street includes Verulamium Lake and Broad Colney Lakes.