To remove builders dust, work from the top of the room to the bottom, and dry before wet. Vacuum every surface with a properly filtered vacuum, then wipe with damp microfibre cloths, then mop the floor last. Do not dry-sweep and do not blow dust away. Both throw the finest particles into the air, where they settle again within hours and where you breathe them in.
This guide gives you the order, the kit, the surface-by-surface detail for plaster dust, and the point at which a professional clean is the cheaper option.
TL;DR
- Clean top to bottom, dry first and damp second: ceilings, walls and shelves, then surfaces, then the floor last.
- Never dry-sweep or use compressed air. Dampen debris or use a vacuum with an H-class or M-class filter, because ordinary household vacuums can pass fine dust straight back into the room.
- Plan on two or three passes over several days. Fine dust keeps settling, so the first wipe is never the last.
- Open windows while you work and wear a well-fitting FFP3 mask if the job is large or the dust is from cutting concrete, brick or plaster.
- If the work was a full renovation, professional after builders cleaning usually takes a fraction of the time you would spend.
Table of Contents
- Why builders dust is harder than ordinary dust
- Before you start: protect yourself
- The kit that actually works
- The order that works, step by step
- Plaster dust on specific surfaces
- Stopping dust coming back
- DIY or professional: how to decide
- What our after builders clean covers
- Our view: clean twice, and clean in the right order
- FAQ
- Sources
Why builders dust is harder than ordinary dust
Household dust is mostly fibres and skin. Builders dust is mineral: plaster, cement, brick, sanded filler, plasterboard. The particles are far finer and they carry static, so they cling to walls, cling to the inside of cupboards and drift into every room with a gap under the door.
That is why a floor that has been vacuumed and mopped three times still looks grey by the next morning. The dust is not coming back from nowhere: it is settling out of the air, or it is being released from surfaces you have not reached yet, such as the tops of door frames, the inside of light fittings and the backs of radiators.
It is also worth taking seriously for your health. The HSE says that dry brushing can push large amounts of dust into the air, and that clearing up can seem low risk when it is not. The risk is higher if the material contains silica or wood dust.
The three kinds of dust you are dealing with
It helps to know what you are looking at, because each type behaves differently.
| Dust type | Where it comes from | How it behaves | Best approach |
|---|---|---|---|
| Plaster and filler dust | Skimming, sanding, plasterboard | Very fine, pale, clogs cloths and filters | Vacuum first, then barely damp cloths, rinsed often |
| Cement, brick and concrete dust | Cutting, chasing, demolition | Heavier, gritty, may contain silica | Dampen debris, use class M or H extraction, wear a mask |
| Wood dust | Sanding floors, joinery | Light, drifts far, can scratch surfaces | Vacuum, then a lightly damp cloth in the direction of the grain |
Before you start: protect yourself
Do this first, because it is the part people skip.
Small-scale clearing can create very high dust levels. According to the HSE's guidance on clearing rubble, the dust may contain respirable crystalline silica, which can cause silicosis, COPD and lung cancer. The NHS explains that silicosis is caused by breathing in large amounts of crystalline silica dust, commonly from construction and demolition work involving concrete and paving materials. Symptoms usually take 10 to 20 years of exposure to appear, though heavy exposure over months can be enough.
A single tidy-up after a small job is not a career of exposure. But HSE research based on 160 occupational-hygiene reports found that cleaning exposure could be very high, and that a short cleaning task could contribute more to a day's dust exposure than several hours of production work. So it is sensible to take sensible precautions.
- Mask: where respiratory protection is needed, the HSE specifies an assigned protection factor of 20, such as a disposable FFP3 mask or a half mask with a P3 filter. Tight-fitting masks need fit testing, which is a workplace requirement. For your own home, a snug FFP3 is the sensible choice. Replace a disposable mask when it is blocked or when you finish, as the HSE advises.
- Ventilation: open windows and use extractor fans where it is safe to do so. NICE advice on indoor air quality recommends this when using cleaning products and similar pollutants.
- Keep others out: children, pets and anyone with asthma or a chest condition should stay out of the room until the first vacuum and wipe are done. If someone in your household has breathing problems, speak to their GP or asthma nurse about what is sensible before they come back in.
- Clothes: change afterwards. Do not use compressed air or a brush to knock dust off your clothes. The HSE's silica guidance says not to do this.
The kit that actually works
You do not need much, but the wrong vacuum undoes the whole job.
- A vacuum with a fine filter. For finer construction dust, the HSE recommends vacuum attachments fitted to an H-class or M-class extraction unit. These are sold as dust extractors or site vacuums and can be hired by the day from most tool-hire shops. A standard vacuum with a basic bag or filter can blow the finest particles out of the exhaust and clog quickly with plaster. If you only have a household vacuum, a HEPA-filtered model is much better than a bagless one with a washable foam filter, and you should empty it outdoors.
- Microfibre cloths, a lot of them. You will rinse or replace them constantly. Plaster dust turns to paste when wet and then streaks.
- A spray bottle of water for damping down debris.
- A brush, shovel and bucket for larger debris, plus heavy-duty bin bags.
- A bucket of clean water, changed often. Grey water just spreads the problem.
- Soft-bristle brush attachment for the vacuum, for textured surfaces and radiators.
What to leave in the cupboard: a dry broom, a leaf blower, compressed air and feather dusters. All of them move dust rather than removing it.
The order that works, step by step
1. Clear the large debris
Pick up offcuts, packaging and plasterboard fragments by hand. Then deal with the loose material on the floor. For minor amounts, the HSE says to damp it down with water and then remove it with a brush, shovel and bucket. Dampen lightly: you want it to stop flying, not to turn into slurry. Bag it and tie the bag. The HSE also says to empty waste bags regularly rather than letting them overfill.
2. Let the air settle
If there was heavy sanding or cutting, leave the room closed for an hour or two with a window open on the opposite side to the door. Starting to clean while the air is still full of dust means doing the work twice.
3. Start at the top, dry
Vacuum the ceiling edges, cornices, light fittings, the tops of doors and frames, picture rails and curtain poles. Then walls, including the paint-fresh ones, using a soft brush head and no pressure. Do not wipe new plaster or fresh paint with a damp cloth. Newly plastered walls need time to dry fully and fresh paint can mark, so vacuum only and check the decorator's advice.
4. Vacuum the middle level
Shelves, window sills, radiators (including between the fins), skirting boards, the insides of cupboards and drawers, and the tops of appliances. Dust loves the inside of kitchen cupboards, particularly where doors were left open during work. Work in one direction around the room so you do not re-dirty what you have done.
5. Wipe with damp microfibre
Only now bring water in. Use a well-wrung cloth, fold it into quarters, and use a fresh face every few strokes. Rinse cloths in the bucket and change the water when it turns grey. For glass and mirrors, vacuum first, then use glass cleaner and a clean microfibre cloth, otherwise you grind plaster into the surface and scratch it.
6. Floors last
Vacuum thoroughly first, including edges and under furniture. Then mop with clean water and a well-wrung mop head, changing the water as soon as it clouds. On hard floors, a damp microfibre flat mop beats a string mop. On carpet, vacuum slowly in two directions, then repeat the next day. Deeply embedded plaster dust in carpet is often a case for professional carpet cleaning, because the dust sits at the base of the pile where a household vacuum does not reach.
7. Repeat after 24 to 48 hours
This is the pass most people miss. Dust still suspended in the air has now landed. A quick vacuum and damp wipe of horizontal surfaces will take the room from clean to genuinely clean.
Plaster dust on specific surfaces
Plaster dust is the most common complaint, because it is so fine and so pale.
- Painted walls: vacuum with a soft brush. If marks remain once the paint has cured, wipe gently with a barely damp cloth, working top to bottom. Rubbing hard can polish or burnish matt paint.
- Wooden floors: vacuum along the boards, then use a lightly damp microfibre mop. Avoid soaking, especially on unsealed wood.
- Tiles and grout: vacuum first, then mop. Plaster dust packs into grout lines, so a soft brush helps. Residue left on tiles can leave a hazy film, which a second mop with clean water normally lifts.
- Windows and frames: vacuum the tracks and seals, then clean the glass. Wipe frames with a damp cloth and dry them.
- Upholstery and curtains: vacuum with an upholstery tool. Curtains that stayed in the room during work are better taken down and laundered, if the label allows. Heavily dusted sofas may need upholstery cleaning.
- Kitchens: wipe inside cupboards and drawers, and check the oven, extractor hood and hob. Fine dust gets into appliances during kitchen refits and is worth sorting before you cook.
Stopping dust coming back
Some of this should happen before the builders start, and some after.
- Seal off the work area with plastic sheeting taped to the door frame. A zip-door is a cheap addition that lets people in and out without opening a gap.
- Close internal doors and put a damp towel along the bottom during dusty work.
- Ask the builders to clean as they go. The HSE says to clean as work proceeds rather than leave it all to the end, and to avoid dry brushing. A site vacuum at the end of each day makes your final clean far shorter.
- Cover furniture with dust sheets, not thin polythene that lets dust through at the seams.
- Change or clean your heating and ventilation filters after the work, and vacuum vents and grilles.
- Run a HEPA air purifier for a few days afterwards if you have one. It will not replace cleaning, but it takes the fine suspended dust out of the air between passes.
- Wash soft furnishings and bedding that sat in the dusty areas. If anyone has allergies, our guide to cleaning for allergies covers the HEPA vacuum and washing routine in more detail.
DIY or professional: how to decide
A small job, such as one room redecorated, a bit of filler sanding or a replaced radiator, is a reasonable DIY clean if you follow the order above. A day or two of work with the right kit will do it.
Call a professional when:
- The work was structural or involved a full-house renovation, an extension or a loft conversion.
- There was a lot of cutting or chasing of brick, block or concrete.
- The dust has got into carpets, upholstery, ducts and cupboards throughout the property.
- You are on a deadline: a house sale, a tenant moving in, or the family returning from somewhere else.
- Someone in the household has asthma, a chest condition or allergies.
It is worth checking what your builder's contract says about cleaning. A post-remodel cleaning contract typically spells out what is included, so you know whether you are expecting a final clean from the builder or just a site tidy. A "broom clean" finish from a trade is not the same as a clean you would be happy to live in.
What our after builders clean covers
We at Cleanny run after builders cleans for homeowners, landlords and offices across Greater London, Reading, Oxford and Cambridge. You book online, our vetted and insured cleaners arrive with the supplies and eco-friendly products included, and the work is backed by our re-clean guarantee. We cover evenings and weekends, seven days a week, so it can be scheduled around the builders leaving.
After builders cleaning does not have a published price, because it depends on the size of the property and how heavy the dust is. Our after builders cleaning page is the place to get a quote. If the job is lighter, such as a redecorated flat, our deep cleaning service starts from £135 as a one-off, and our domestic cleaning starts from £18 per hour for follow-up visits once the dust has settled. You can see everything we offer on our services page.
Our view: clean twice, and clean in the right order
Most people who ring us after trying to clean up themselves have done the work properly but in the wrong order. They mopped first, or swept, or wiped a wall that had not been vacuumed, and spent a weekend moving grey paste around the house.
The method we follow is simple. Dry vacuum from the ceiling down, damp wipe from the top down, floors last, and return to the same room again after the dust has settled. The second visit matters. On any renovation, dust that was airborne during the first clean lands on the surfaces you just did. A single visit hides that, which is why a re-clean guarantee matters on this kind of job.
The other thing we would say is that the cheapest part of a renovation clean is the labour you do not do yourself. Hiring or buying the right extractor, a mask that fits, and the time to repeat the work usually costs more than people expect, and it puts the dust in your lungs and not a cleaner's equipment.
— CLEANNY
FAQ
How long does builders dust take to settle?
The heaviest particles settle within hours, but the finest can stay airborne for a day or more, especially if doors are opened and closed. That is why we recommend a second vacuum and wipe 24 to 48 hours after the first clean.
Can I use a normal vacuum for plaster dust?
It is risky. Fine plaster dust clogs household vacuums and can pass through basic filters back into the room. The HSE recommends H-class or M-class extraction for finer construction dust. If you only have a household model, use one with a HEPA filter and clean the filter often.
Is it safe to breathe in construction dust?
Not in large amounts. Dust from concrete, brick and plaster-related work may contain respirable crystalline silica, which the HSE and NHS link to silicosis and other lung disease after long or heavy exposure. Wear an FFP3 mask, ventilate and avoid dry sweeping. If you have a chest condition or symptoms, speak to your GP.
What is the best way to clean dust off walls after renovation?
Vacuum first with a soft brush attachment, working from top to bottom. Only wipe with a barely damp cloth if the paint has fully cured, and avoid wiping fresh plaster. If marks remain, ask your decorator before using anything stronger.
How much does after builders cleaning cost?
The price depends on the size of the property and the amount of dust, so we quote per job. You can start from our after builders cleaning page.
Sources
- Construction dust: Dry sweeping, HSE
- COSHH essentials CN5: Small scale clearing of rubble, HSE
- Control of exposure to silica dust, HSE
- Industrial Cleaning: Exposure to Dust Hazardous to Health, HSE
- Silicosis, NHS
- Improving indoor air quality, NICE
- Post remodel cleaning contract guide