The renovation is finished — the new floor is laid, the walls are freshly painted, the bathroom gleaming. But the flat looks like a building site. Dust from plaster, cement and sand has seeped everywhere — into drawers, onto shelves, behind radiators, into the ventilation openings. Remnants of paint, adhesive and silicone sealant adorn the tiles and glass. Post-renovation cleaning is a special category that requires a special approach, special tools and—most importantly—the correct order.
Why is post-renovation cleaning special?
Renovation dust is not ordinary dust. It contains:
- Plaster and cement — alkaline dusts which can be irritating to the skin and respiratory tract on contact
- Silicate particles from sand and gravel — potentially harmful to the lungs with prolonged exposure
- VOCs (volatile organic compounds) from paints, varnishes and adhesives
- Microplastics from insulation materials
- Heavy metals in old paints (especially in older flats)
This means that you should never carry out the clean-up after renovation without a protective mask (at least an N95 or FFP2) and gloves.
What you need to prepare
Protective equipment
- Mask — N95/FFP2 at a minimum
- Rubber gloves
- Goggles or a face shield (plaster dust irritates the eyes)
- Old clothes or a coverall
Tools and Materials
- Industrial vacuum cleaner with a HEPA filter (a standard domestic one cannot cope with the amount of dust from the renovation)
- Buckets, microfibre cloths (several sets)
- Surface paint stripper (for spatters)
- Adhesive remover
- Vinegar or scale remover for tiles
- Steam cleaner for disinfection and fine deposits
- Scraper for paint chips on glass
Golden rule: from top to bottom, from dry to wet
Dust falls — everything you clean from above will fall on the floor. If you start with the floors, you'll have to clean them twice.
Dry dusting (vacuuming, wiping with a dry cloth) comes BEFORE wet. Wet dust from plaster and cement sticks and is harder to remove.
Cleaning order — room by room
Phase 1 — Rough ventilation and drying (1-2 days)
Immediately after the work is finished:
- Open all windows wide — ventilate for 24-48 hours
- Allow the VOCs from paints and adhesives to air out
- In cold winter conditions — heating to 18-20°C speeds up the evaporation of VOCs
- Do not clean while the paints and adhesives are fresh — rely on ventilation
Phase 2 — Coarse Debris (Day 1)
- Sweep or vacuum up coarse debris from the floor (concrete, plaster, wood chips)
- Industrial vacuum cleaner goes over all surfaces — ceilings, shelves, walls, floors
- Remove plastic sheeting and protective paper
- Collect all construction waste (into bags for construction waste)
Phase 3 — Details and splatters (day 2)
Paint on tiles and glass
- Fresh paint (latex): warm water + sponge — scrape carefully
- Dried paint on tiles: plastic scraper + paint stripper
- Paint on glass: razor blade (in a safety holder) at a 30° angle — glides over wet glass and removes paint without scratching
Glue and silicone
- Silicone residue: specific silicone remover (available at Bauhaus, OBI) + plastic spatula
- Tile adhesive: commercial adhesive remover or acetone (use with caution on plastic surfaces)
- PUR foam: special PUR foam remover — do not use acetone on PVC windows
Cement build-up on tiles
This is the hardest part. Cement that has dried on the tiles without a protective coating is difficult to remove:
- Soak the deposit with an acidic solution (10% acetic acid or a commercial cement remover)
- Leave for 10-20 minutes
- Carefully scrape off with a plastic spatula
- Never use metal tools on glazed tiles — they will scratch the glaze.
Phase 4 — Wet Cleaning (day 2-3)
- Wet microfibre cloth over all surfaces (cupboards, shelves, windowsills)
- Clean windows — inside and out
- Cleaning radiators and ventilation grilles
- Wet method floor washing (two buckets — one with detergent, one with clean water for rinsing)
- Special attention to corners and the joins between floors and walls
Phase 5 — Steam cleaner for the finish
Kärcher SC5 for the final clean:
- Grout between new tiles (removes the remaining whitish cement film)
- Taps and fittings (polishes and disinfects)
- Floor joints (where the floor meets the wall)
- Toilet and bathroom in general
Specific areas most often missed
| Location | Problem | Solution |
|---|---|---|
| Behind radiators | Plaster dust | Vacuum cleaner with crevice tool |
| Ventilation openings | Blocked with dust | Remove the grille, vacuum and wash |
| Inside the cupboard | Dust has entered through the cracks | Vacuum and wipe with a damp cloth before putting things away |
| Window frames | Plaster and paint in the grooves | Plastic spatula + brush |
| Electrical sockets | Dust inside the opening | Dry vacuum cleaner carefully (no water!) |
| Floor and wall joints | Cement and adhesive | Acid remover + brush |
Cleaning furniture that was in the flat during renovations
Furniture left in the renovation area (covered with plastic sheeting or not) has been infiltrated by dust. After the renovation is complete:
- Move furniture outside or to another room
- Vacuum all upholstery, then wipe with a damp cloth
- For a deeper clean of upholstered furniture — extract cleaning with a Puzzi machine
- Leather — wipe with a damp cloth and moisturise with a leather conditioner
How long does post-renovation cleaning take?
| Size of the flat | Ease of renovation | Cleaning time |
|---|---|---|
| Studio flat (up to 35 m²) | Small (paint, laminate flooring) | 1 day (6-8 hours) |
| Two-room flat (up to 60 m²) | Small | 1-2 days |
| Two-room | Larger (plaster, tiles, electrics) | 2-3 days |
| Three-room (up to 90 m²) | Major renovation | 3-5 days |
| Complete renovation | All rooms | Week and more |
Local context
Flat owners in Dugo Selo, Sesvete, Brckovljani, Vrbovec, Sveti Ivan Zelina and the Zagreb area who are undergoing renovations are increasingly using professional post-construction cleaning services. Post-renovation cleaning is a specialised job that requires industrial-grade equipment and experience — especially when it comes to removing cement deposits and plaster dust. A combination of an industrial vacuum cleaner, a steam cleaner, and furniture extraction cleaning delivers the fastest and highest-quality results.
Frequently Asked Questions (FAQ)
How long should you wait before moving into a flat after renovation?
A minimum of 2-4 weeks after painting and varnishing is recommended to allow VOCs to off-gas. Depending on the materials, the smell may be noticeable for longer. Children and pregnant women should wait longer. Intensive ventilation (all windows, a fan) speeds up the airing-out process. Water-based (latex) paints release fewer VOCs than alkyd (oil) paints.
Can a standard household vacuum cleaner handle plaster dust?
No — or not for long. Plaster and cement dust is extremely fine and quickly clogs household vacuum cleaner filters. A domestic vacuum cleaner used for renovation dust can be permanently damaged. Use an industrial vacuum cleaner with a HEPA filter for fine dust — they are available from tool hire services, or hire professionals who come with their own equipment.
How to remove paint from a floor (wooden floor or tiles)?
Fresh latex paint — warm water + sponge immediately. Dried latex paint — plastic scraper + a little alcohol. Alkyd (oil) paint — commercial remover or acetone (test on an inconspicuous area). For tiles — acetone is safe. For lacquered parquet — be careful, acetone can damage the lacquer, test in an inconspicuous area.
What to do with plaster dust in the air ducts?
Air ducts that have been exposed to renovation dust need cleaning. Remove the grilles and vacuum the accessible part of the duct. If the renovation was extensive, consider having the air ducts professionally cleaned — especially if you have a filtered system (air conditioning, heat recovery ventilator). Clogged ducts reduce airflow and can become a source of odours.
Should you disinfect your flat after renovation?
Strictly speaking, no, because renovation is not a biological contamination. But the prolonged presence of workers and exposed surfaces means there's a possibility of contamination. After cleaning, a round of disinfection (a steam cleaner or a disinfectant cloth on surfaces) is not an excessive measure — especially for the bathroom, kitchen and children's rooms.
Can new carpets and furniture be brought in as soon as the work is finished?
This is not recommended. Furniture and carpets brought into a dusty space will immediately pick up plaster dust. Bring them in only after the flat has been completely cleaned and thoroughly wet-wiped. This is especially true for new carpets — once plaster dust gets into the carpet fibres, it can only be removed by extraction cleaning.
What to do about paint splatters on the windows?
A razor blade (safety razor blade) on wet glass at a 30° angle is the safest and most effective method. Wet the glass with water or vinegar, slide the blade slowly — the paint comes off without scratching. Never use the blade on dry glass, and do not use it on plastic or laminated glass.
How much does professional cleaning of a flat after renovation cost?
It depends on the size of the flat and the extent of the renovation. As a guide: studio flat €150-€250, two-bedroom flat €250-€400, three-bedroom flat €350-€600. The price includes an industrial vacuum cleaner, all necessary chemicals and teamwork. The duration is 4-8 hours, depending on the size. In this region (Dugo Selo, Sesvete, Vrbovec, Zagreb), professional teams arrive with complete equipment.
Conclusion
Cleaning after a renovation is a project in itself — but with the right order, protection, and tools, it can be done in 2-3 days for an average flat. The key is patience, the right order (from top to bottom, dry then wet), and accepting that this is a special type of cleaning that requires a special approach.
If you don't have the right equipment or simply want to leave the job to the professionals, there are solutions that can significantly speed up and ease the entire process.