Timber Floor Hazards & Failure Modes
12 profiles of the things that damage timber floors over a 20-year horizon. Every risk, mitigation and product guidance cites a WoodSolutions TDG, ATFA specification, Timber Queensland TDS, AS 3959 / NCC reference or a Bona TDS with page number. Where the published corpus doesn't cover a question, the profile says so in a gaps list rather than inferring a figure.
UV / sun bleaching
All clear-finished timber floors change colour under UV. Most Australian eucalypts darken (red-browns deepen, ambers turn amber-brown). A few species bleach toward grey. Understanding the direction and rate lets you p...
Moisture — cupping, crowning, gapping
A timber floor moves with the seasonal moisture content of the air around it. Get the installation moisture content wrong for the climate zone — or let the slab wet the back of the boards — and you will see cupping (e...
Slab / substrate moisture transfer
Concrete slabs keep releasing moisture vapour for months (sometimes years) after pour. If that vapour reaches the back of a timber floor it causes cupping, adhesive failure and mould. The mitigation is a calibrated RH...
Salt air / coastal exposure
Coastal sites accelerate fastener corrosion, raise interior humidity, and load the finish with airborne chlorides. Species selection + stainless/galvanised fastener specification + a tougher waterborne topcoat + a rea...
Termite / Lyctus susceptibility
Subterranean termites are distributed across mainland Australia and cause most economically significant termite damage. Specify termite-resistant timber (or preservative-treated pine) in the flooring AND the framing, ...
Heat — underfloor hydronic / ducted
Timber over underfloor heating needs to cope with a continuous dry-heat load and a predictable seasonal gap cycle. Engineered boards on a matched-conductivity substrate with a controlled surface temperature and a wate...
Abrasion — pets, castors, heels, commercial traffic
Every floor coating fails the same way: micro-scratching from grit underfoot builds up and eventually breaks through the film. The spec question is how long that takes and how maintainable the finish is. Bona publishe...
Spills / chemical damage
Red wine, pet urine, nail polish remover and household cleaners all have a window where they are recoverable and a window where they force a sand-back. Bona's TDS says 'spills should be removed promptly'; the next-day...
Fire / BAL bushfire zones
Two different fire questions apply to timber floors: (1) internal fire hazard properties — CRF and Group Number — for NCC Class 2–9 buildings, and (2) external BAL rating for buildings in bushfire-prone areas per AS 3...
Refinishing cycles & scratches
A solid 19 mm T&G can be sanded 3–4 times over a life. An engineered board can be sanded as many times as its wear layer allows — often once, sometimes twice. Choose between recoat (screen and re-topcoat) and sand-bac...
Adhesive failure / squeaky floors
Creaks, squeaks and delamination are the post-occupancy complaints architects can't design away with species selection — they come from installation detail and adhesive choice. ATFA's Issue 51 article documents a cros...
Colour change from tannin bleed
Waterborne finishes on high-tannin species (Blackbutt, Tallowwood, Ironbark) can reactivate tannins in the first 24 hours and leave dark streaks that telegraph through the cured film. The controlled answer is Bona Int...
How this hub is sourced
Every hazard profile is built directly from the same documents architects already rely on: WoodSolutions Technical Design Guides (TDGs), ATFA's Problems, Causes and Remedial Measures plus the ATFA installation/sanding/coating specification, Timber Queensland Technical Data Sheets (the TDS series that underpins AS 2796.1), AS 3959 bushfire construction, NCC handbooks from the ABCB, and Bona's own TDSs for R540, R820, Traffic HD, Traffic HD Raw, Craft Oil 2K, Mega EVO, and the Intense / Classic / Classic UX / White primer family. Source filenames and page numbers are listed in every profile.