Timber Flooring NZ: The Complete Guide
What is timber flooring, and why does it suit New Zealand homes?
Timber flooring in New Zealand refers to solid or engineered hardwood planks installed over concrete or plywood substrates. For our variable climate, engineered oak outperforms solid timber on dimensional stability, moisture resistance and compatibility with underfloor heating.
Building Code and moisture requirements
Under NZ Building Code clause E3, internal moisture, flooring must perform where relative humidity fluctuates seasonally. Auckland averages around 75% relative humidity, and Canterbury sits nearer 65 to 70%. Engineered oak with a cross-laminated core handles these swings far better than solid timber, which can gap, crown or cup when moisture levels shift.
Before installation, subfloor moisture should be tested. Industry practice puts concrete slabs below 75% RH via ASTM F2170 in-situ probe, or below 5.5% on a calcium chloride test, and timber substrates within 2% moisture content of the flooring itself. Getting this wrong is the leading cause of timber floor failure in New Zealand.
Our documented Alternative Solution for NZBC E3 is available to download, along with fire load assessment and full installation instructions.
Underfloor heating compatibility
Engineered timber flooring is compatible with hydronic and electric underfloor heating, provided surface temperature does not exceed 27 degrees Celsius. Exceeding this dries the timber excessively and voids most manufacturer warranties. Use a thermostat with a floor sensor and commission the system at least two weeks before installation to drive residual moisture from the slab.
Full operating parameters are set out in our Underfloor Heating Declaration.
Installation methods for New Zealand conditions
Three methods suit New Zealand projects. Direct stick, or glue-down, is the standard for concrete slabs and underfloor heating as it maximises heat transfer and eliminates hollow sound. Floating installation works over plywood or existing hard floors with a quality acoustic underlay. Secret nail-down suits timber joists or battens in older homes.
Whichever method you choose, acclimatise planks in the room they will be laid in for at least 48 hours before installation. Many installers skip this step, and it causes problems years later.
Service life and refinishing
When the surface wears, the floor is sanded and recoated in place rather than lifted and thrown away. The 6mm oak wear layer allows that four or five times over. Marchand flooring carries a 25 year residential warranty.
Maintenance is simple. Sweep or vacuum regularly, damp-mop with a pH-neutral timber floor cleaner, and avoid excessive water. Full guidance is in our After Care Guide.
The most sustainable floor is the one you do not replace.
What drives cost
Price varies with oak grade, plank width, wear layer thickness, finish and the amount of subfloor preparation required. Wider and longer boards cost more because they demand higher grade logs and produce more waste in milling.
Marchand prices flooring at a single rate across every colour, so your selection is driven by design rather than budget. For an indicative price on your own plans, book a consultation.
Frequently asked questions
Is timber flooring suitable for Auckland's humidity?
Yes. Engineered timber is designed for high-humidity environments and Auckland's average 75% RH is well within tolerance for cross-laminated oak. Solid timber is riskier and may cup or gap seasonally. Ensure your installer tests subfloor moisture and allows proper acclimatisation.
Can I install timber flooring over underfloor heating?
Yes. Engineered oak performs well over both hydronic and electric systems. Keep surface temperature at or below 27 degrees Celsius, use a floor-sensor thermostat, and commission the heating at least two weeks before installation.
How long does timber flooring last compared with vinyl or laminate?
Vinyl and laminate cannot be sanded, so when the surface fails the product fails. Oak can be reset, and our 6mm wear layer is good for four or five re-sands. Ask each supplier how thick the wear layer is and how many times the floor can be refinished, rather than relying on marketing claims.
See it in person
Order a sample to see the grain and tone in your own light, or visit our Christchurch, Auckland or Queenstown studios. Completed work is documented across our projects.
