Guide · Timing & triggers · UK-Wide
A fit-out leaves fine dust in the ductwork, the new canopy and the equipment seals - and it circulates every time the extraction runs. A deep clean clears it before you go live.
The short answer
A refurbishment or fit-out leaves behind more than the mess you can sweep up. Fine plaster, concrete, MDF and cutting dust drifts into the ductwork, settles inside the new canopy, works into equipment seals and coats the surfaces food will touch. Left in place, it circulates every time the extraction runs - sometimes for months. A post-refurbishment deep clean is what clears what you cannot see before the kitchen goes live.
The moment the last trade packs up, the space stops being a building site and becomes a food-preparation environment - and it has to meet that standard, not a builder's one. Fine dust is the specific problem, because unlike grease it is light enough to stay airborne, drift through a running extraction system and resettle onto clean surfaces after you think you have finished. A quick wipe of the worktops does nothing about the particulate sitting in the duct waiting to be drawn out over your prep.
Where it hides
The places construction dust collects are, conveniently, the same places a deep clean is built to reach: inside the ductwork and canopy, behind splashbacks, under bench overhangs, in drawer runners and around the rubber seals on cool-room and fridge doors. These are exactly the zones a surface tidy skips - the same hidden pockets described in the hidden grease traps a daily wipe-down never reaches, only carrying dust rather than grease this time. If the fit-out installed a new extraction system, that duct starts its life with a load of building dust in it unless someone removes it before the fan first runs in anger.
This is where the distinction between a builder's clean and a kitchen deep clean matters most, and it is worth being precise about it. A builder's clean clears the visible debris, protective films and stickers so the space looks finished. A deep clean takes it to a food-safe standard - degreasing and sanitising the food-contact surfaces, clearing the particulate from the system, and readying the kitchen for its first regulated day. The two are not interchangeable, and the gap between them is set out in the difference between a builder's clean and a kitchen deep clean. Going live on a builder's clean alone is one of the quieter ways a new or refurbished kitchen fails its opening inspection.
That first inspection is the reason the timing is not optional. A refurbished kitchen faces an early EHO visit, and construction dust on prep surfaces or in the ventilation is a compliance risk that can delay an opening or dent a rating from day one - the shape of that visit is covered in the first EHO visit to a new food business. Sequence it right and the kitchen presents as a working food business, not a finished building site.
The honest limit is specific here. A post-refurbishment deep clean removes the dust and readies the surfaces and system - but it is necessary, not sufficient, to get a new installation running safely. It does not commission the newly fitted extraction, measure the airflows or sign off the system - that is the installer's job, with its own records. The clean makes the kitchen food-safe; the commissioning makes the ventilation prove it performs. You need both, and they are different trades.
Questions
Usually not for a kitchen. A builder's clean clears visible debris and makes the space look finished; it does not take food-contact surfaces and the extraction system to a food-safe standard. For a kitchen going live you want the deep clean on top.
Because it is fine and light enough to stay airborne, drift through a running extraction system and resettle onto surfaces you have already cleaned. Grease stays put; building dust keeps circulating until it is cleared from the system.
In the ductwork and new canopy, behind splashbacks, under bench overhangs, in drawer runners and around fridge and cool-room door seals. Those are the hidden zones a surface wipe misses - and the ones a deep clean is built to reach.
It removes the dust that would otherwise be a compliance risk on prep surfaces or in the ventilation, which is a common reason refurbished kitchens stumble at the first EHO visit. It puts you in the right condition to be inspected.
No - and that boundary matters. The clean makes the system and surfaces food-safe, but commissioning the new extraction, measuring the airflows and signing it off is the installer's job, with its own records. You need both.
Phoenix Duct Clean · by the numbers
Book a post-refurbishment deep clean before your first service. We clear the ductwork, the new canopy and the food-contact surfaces to a food-safe standard. No-obligation quote, UK-wide.