Plastering — whether it's stopping and taping GIB board, applying a scratch coat, or skimming a ceiling — generates a surprising amount of dust, splatter and debris. Taking an hour or two to prepare your space properly before the plasterer arrives can save you hours of cleaning and potentially hundreds of dollars in damaged furniture or flooring.
Why Preparation Matters
Plaster dust is extremely fine and travels further than you'd expect. Wet plaster splatter can stain upholstery, timber floors and carpet if it dries before you notice it. Even experienced plasterers working carefully will produce mess — it's simply the nature of the trade. The good news is that most of the risk is easy to manage with a bit of forward planning.
Step 1: Remove What You Can
The single most effective thing you can do is remove furniture and belongings from the work area entirely. Move items to another room, the garage, or a storage unit if needed. This includes:
- Sofas, chairs, tables and beds
- Rugs, curtains and soft furnishings
- Electronics, TVs and computers
- Artwork, mirrors and wall hangings
- Ornaments, books and anything on shelves
If a room is being fully replastered or re-lined with GIB plasterboard, aim to clear it completely. Even items in adjacent rooms can be affected if doors are left open.
Step 2: Cover What Can't Be Moved
For large or heavy items that can't be shifted, use heavy-duty dust sheets (also called drop cloths). Thin plastic sheeting tears easily and lets fine dust through — opt for woven polypropylene or canvas-backed plastic sheets where possible. You'll find a good range at Bunnings or Mitre 10.
- Drape sheets fully over furniture and tape edges down with masking tape so they don't slip
- Double-layer covers over anything particularly valuable
- Cover built-in wardrobes and cabinetry, including handles and hinges
Step 3: Protect Your Floors
Floors take a beating during plastering. Wet plaster dropped on timber or vinyl can be very difficult to remove once it sets.
- Carpet: Lay heavy-duty plastic sheeting or canvas drop sheets and tape joins together. Consider hiring a carpet protection film for high-traffic areas.
- Timber and engineered floors: Use thick canvas drop sheets — avoid thin plastic, which can trap moisture and cause swelling in timber boards.
- Tiles: Generally more resilient, but still worth covering to avoid scratching from tools and debris.
Run protection right to the skirting boards and tape edges securely so the plasterer isn't walking on loose sheeting.
Step 4: Seal Off Adjacent Areas
Plaster dust migrates through gaps under doors and into other rooms. Use draught excluders or old towels along the bottom of doors leading to areas you want to keep clean. If the work is extensive, consider hanging a dust barrier curtain (a sheet of heavy plastic taped over the doorframe) to create a proper seal.
Switch off any ducted heating or ventilation systems that draw air from the work area — otherwise dust will be distributed throughout the house.
Step 5: Communicate With Your Plasterer
Before work begins, have a quick conversation with your plasterer about:
- Which areas they'll be working in each day
- Where they'll be mixing plaster (this is often the messiest spot)
- Whether they'll be sanding — dry sanding creates far more airborne dust than wet methods
- Their own dust management practices (some plasterers use vacuum-assisted sanders)
A good tradesperson will appreciate that you've prepared well and will work with you to keep the mess contained. You can find qualified local plasterers on tradedirectory.co.nz.
Step 6: Protect Yourself During the Work
If you need to enter the work area while plastering is underway or during sanding, wear a P2 dust mask at minimum. Fine plaster and gypsum dust can irritate your lungs. WorkSafe NZ has guidance on dust exposure and respiratory protection that's worth a read.
After the Work: Cleaning Up
- Allow dust to fully settle before vacuuming — ideally wait several hours after sanding finishes
- Use a vacuum with a HEPA filter rather than sweeping, which just redistributes dust
- Wipe hard surfaces with a damp cloth, not a dry one
- Check furniture covers before removing them — fold inward so any surface dust doesn't fall onto clean floors
- Inspect floors carefully for any dried plaster spots and remove promptly with a damp sponge before they harden further
When to Call a Professional
While preparing your home for plastering is firmly a DIY task, the plastering work itself — particularly stopping and finishing GIB board to a quality standard, or applying textured coatings — is best left to a qualified tradesperson. Poor plastering is very visible once painted and difficult to fix. If your project involves structural work, new wall linings or changes to the building envelope, check with your local council whether a building consent is required under the NZ Building Code. Some work may qualify as a Schedule 1 exemption, but always confirm with your council rather than assuming.
For painting after plastering, allow the plaster to cure fully — your plasterer can advise on timing — and consider consulting Resene or Dulux for suitable primers and topcoats for freshly plastered surfaces.
Master Painters NZ member
