Real Lifespans in Wellington Conditions
In Wellington's challenging climate, premium exterior paint lasts 8–12 years on well-maintained timber weatherboards. Mid-range products typically achieve 5–7 years. Budget paints fail within 3–4 years, often with peeling starting at joints and edges.
These figures assume proper surface preparation, premium primer, two finish coats, and appropriate product selection. A paint job done cheaply or quickly can halve these lifespans.
Coastal homes in Seatoun, Island Bay, and Plimmerton see reduced lifespans. Salt spray accelerates degradation by 15–25%. Premium paints are essential in these areas — the extra cost per litre is recovered through extended service life.
Roof paint has a shorter cycle: 5–8 years for metal roofs, 8–12 for concrete tiles. Wellington's wind drives debris and causes mechanical wear on roof coatings, especially on exposed ridge caps.
Factors That Extend or Reduce Lifespan
Surface preparation is the single biggest factor. Paint applied over failing paint, damp timber, or dirty surfaces fails prematurely. We spend 60% of project time on preparation — sanding, priming, filling, and weatherproofing. This investment determines the decade-long outcome.
Colour choice matters. Dark colours absorb more heat, causing timber to expand and contract, stressing the paint film. In Wellington's high-UV environment, very dark colours (charcoal, deep navy) may show stress cracking 2–3 years earlier than mid-tones.
Timber species affects adhesion. Western red cedar, popular in Khandallah and Karori, contains natural oils that can bleed through paint. Specialist cedar primers are essential — standard primers fail within 2 years on cedar.
Microclimate variations within Wellington are significant. A house in a sheltered Karori valley performs differently from an exposed Brooklyn ridge. We assess each property individually and specify products accordingly.
Maximising Your Paint Investment
Annual washing extends paint life significantly. Remove salt film, bird droppings, and pollution accumulation with a soft brush and mild detergent. This prevents the chemical breakdown that causes chalking and fading.
Inspect and touch up annually. Small chips at edges, nail holes, or areas where bushes rub against walls should be spot-primed and touched up before moisture penetrates. We offer affordable annual maintenance inspections.
Maintain gutters and drainage. Water running down walls from overflowing gutters is the fastest route to paint failure. Ensure downpipes direct water well away from foundations and walls.
Trim vegetation away from walls. Constant contact with plants traps moisture and provides a pathway for insects. A 150mm clearance between plants and walls is ideal.
When repainting, don't just go over the old paint. Proper stripping or sanding back to sound substrate, re-priming, and applying full systems ensures the new coating achieves its full lifespan potential.