Lead paint safety & removal in Canterbury homes

Lead-based paint was widely used on New Zealand homes into the 1960s, and low-lead paints stayed on shelves through the 1970s. Lead in domestic paints wasn't tightly restricted here until the mid-1980s. That means a lot of Canterbury housing stock is in the risk window, including:

• Pre-1960s villas and bungalows in inner Christchurch suburbs.
• 1950s–1970s state houses and weatherboard homes.
• Older cottages, farm houses and outbuildings across Selwyn and Waimakariri.
• Newer homes with old repainted joinery, doors, window sashes or garden sheds carried across from an older property.

Exterior weatherboards, window frames, eaves, doors, skirting and old radiators are the usual suspects. Modern top-coats often sit over older lead layers underneath.

You can't tell for certain just by looking. The reliable options are testing and, when in doubt, treating the paint as if it contains lead.

• Swab test kits from hardware stores give a quick indicator on a small area. Useful for a first check, but not definitive.
• Laboratory paint chip testing is the gold standard. A small sample is taken carefully and sent to an accredited NZ lab.
• XRF testing by a qualified assessor can scan surfaces on-site without damaging the paint.

Visual warning signs that push the risk higher: chalky, cracking or "alligatored" old paint, thick multi-layer build-up on weatherboards, and yellow, cream or brick-red pigments common in mid-century paints.

The danger isn't intact paint on a wall. It's the dust and chips created when old paint is sanded, scraped, water-blasted or burnt off. Fine lead dust settles on floors, soil and window sills, and children pick it up through normal hand-to-mouth contact.

Even small ongoing exposure can affect a child's brain and nervous system development. Adults doing DIY renovations are also at risk when they sand or blast old paint without proper controls. This is why the standard rule for pre-1980s homes is: if in doubt, contain and control.

When we're working on an older Canterbury home and lead is possible or confirmed, we follow lead-safe work practices aligned with WorkSafe NZ guidance. In practice that means:

• Testing first. We test suspect areas or arrange lab testing before we disturb anything, so we know what we're dealing with.
• Full site containment. Heavy-duty plastic sheeting on the ground and around the work area. Windows and vents sealed. Furniture, gardens and play areas covered or moved. Kids and pets kept clear of the zone.
• Wet methods, never dry sanding. We wet-sand and wet-scrape to keep dust down. No open-flame burning, no power sanding without extraction, no high-pressure water blasting of loose lead paint.
• HEPA-filtered extraction. Where sanding is unavoidable we use sanders connected to HEPA vacuums that capture fine lead particles at the source.
• PPE for the crew. P2/P3 respirators, disposable coveralls and gloves. We change on-site and don't walk contaminated gear through your home.
• Clean-as-you-go and HEPA final clean. Daily wet clean-down and a full HEPA vacuum of the work area, surrounds and access paths at the end of the job.
• Safe waste disposal. Paint chips, dust and used sheeting are bagged, sealed and disposed of through an approved waste stream, not put out with the household rubbish.
• Encapsulation where it makes sense. On sound surfaces, sealing the existing paint with a proper primer and top-coat system is often safer and more cost-effective than stripping it back.

• Don't dry-sand, wire-brush or water-blast old paint yourself.
• Keep kids and pregnant women out of any active work zone.
• Wipe window sills and floors near flaking paint regularly with a damp cloth, not a dry duster.
• If you're planning a renovation on a pre-1980s home, ask for lead testing before demolition or sanding starts.
• Choose a painter who will tell you honestly if a job needs lead-safe work practices and price for it properly.

This guide is general information for Canterbury homeowners, not a substitute for a site-specific assessment. For confirmed high-risk situations (large-scale removal, commercial buildings, or heavily contaminated sites) a licensed lead abatement specialist may be required.