Old kauri floorboards are a genuine treasure — the timber is dense, beautifully grained, and no longer commercially harvested in New Zealand, making it essentially irreplaceable. With patience and the right technique, you can lift kauri boards largely intact for reuse, resale, or repurposing. Rushing the job or using the wrong tools is the fastest way to split, gouge, or crack timber that could otherwise last another century.
Understand What You're Working With
Kauri (Agathis australis) was widely used in NZ homes built roughly between the 1880s and 1940s. The boards are typically tongue-and-groove (T&G), secret-nailed through the tongue, and often face-nailed as well — particularly near the perimeter. Over decades, paint, varnish, and grime can bond boards tightly together, and the timber itself becomes very hard and brittle with age. Take time to assess the floor before you start:
- Check for face nails (visible nail heads on the surface) versus secret nails hidden in the tongue.
- Look for any boards that have been patched, replaced, or glued — these will behave differently.
- Identify the direction of the tongue (usually facing away from the wall where the floor was laid first).
- Check underneath if possible — are the boards sitting on joists, or is there a subfloor beneath?
Tools You'll Need
- Flat pry bar (600–900 mm) and a short wonder bar or cat's paw
- Oscillating multi-tool with a wood/nail blade — invaluable for cutting through old nails flush
- Hammer and nail punch
- Circular saw or jigsaw (only if you need to cut a starter board)
- Stiff-bladed putty knife or wide chisel (50 mm+)
- Knee pads and safety glasses
- Dust mask rated P2 or better — old kauri floors often have lead paint or decades of dust
Step-by-Step Removal Process
1. Clear and Prepare the Room
Remove all furniture, rugs, and skirting boards. Prise skirting carefully — it may also be kauri worth saving. Sweep or vacuum the floor thoroughly.
2. Find Your Starting Board
The easiest starting point is usually along one wall, or at a doorway where a board end is exposed. If no end is accessible, you may need to carefully cut through one board with a circular saw set to the board's depth to create a starting gap — take care not to cut into joists below.
3. Deal With Face Nails First
Use a nail punch to drive any face nails down through the board before attempting to lift. Trying to prise a board up over a face nail will split it. Alternatively, use an oscillating multi-tool to cut the nail shank flush between the board and joist.
4. Work the First Board Free
Slide a stiff putty knife or chisel into the gap between boards to break the paint seal. Then work your short wonder bar or cat's paw gently under the board edge. Apply slow, even pressure — never lever hard in one spot. Move along the board in 300–400 mm increments, gradually walking it up. Place a scrap of timber under your pry bar to spread the load and protect adjacent boards.
5. Lift Subsequent Boards
Once the first board is out, subsequent boards are much easier. You now have a gap to work into. Slide your flat pry bar along the tongue side of each board and ease it up progressively. The tongue-and-groove joint can grip tightly — use the putty knife to break the seal before levering.
6. Remove Remaining Nails
As each board comes up, use pliers or a claw hammer to pull nails from the board itself (pulling through the face side will cause blowout — always pull from the back or punch through). Remove nails left in the joists so the area is safe to walk on.
7. Stack and Store Boards Correctly
Stack boards flat, with stickers (small timber spacers) between each layer to allow airflow and prevent warping. Keep them in a dry, covered area out of direct sun. Label which face is up if the boards are to be relaid.
Lead Paint and Asbestos — A Safety Warning
Many pre-1980s NZ homes contain lead-based paint and potentially asbestos in associated materials (underlays, adhesives, linings). Before sanding or cutting, check for these hazards. WorkSafe NZ has clear guidance on working safely around hazardous materials. If in doubt, have materials tested before proceeding.
Do You Need a Building Consent?
Removing internal floorboards is generally considered maintenance and does not require a building consent under Schedule 1 of the Building Act — but this depends on the scope of work and your specific situation. Always confirm with your local council before starting, particularly if the work affects structural elements like joists or bearers. MBIE Building Performance has useful guidance on what work is exempt.
When to Call a Professional
Kauri floors in older homes can hide a range of surprises — rotted joists, subfloor plumbing, old electrical wiring run under boards, or even asbestos-containing materials. If you encounter any of the following, stop work and call in the right professional:
- Electrical cables running under or through the floor — any work near wiring must comply with NZ regulations, and restricted electrical work must be carried out by a registered electrician (EWRB).
- Plumbing pipes — restricted plumbing work must be done by a licensed plumber (PGDB).
- Structural damage to joists or bearers — consult a Licensed Building Practitioner.
- Large-scale demolition — if you're removing floors as part of a bigger renovation, a demolition contractor will have the experience and equipment to protect salvageable materials efficiently. You can find qualified local demolition contractors on tradedirectory.co.nz.
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