Indoor summer temperatures across New Zealand have been climbing for the past two decades — and South Taranaki homes are no exception. Whether you’re dealing with a stuffy bedroom at night or a living area that turns into a greenhouse by 3pm, overheating is increasingly a bigger comfort problem than staying warm in winter.
Research from BRANZ (New Zealand’s building research body) found that indoor summer temperatures have risen by 1–2°C over the past 20 years, with 36% of monitored bedrooms classified as overheating. More people now feel too warm in summer than too cold in winter.
So what can South Taranaki homeowners actually do about it?
Start with the design basics
The most cost-effective approach is passive design — before spending money on anything else:
- Orientation matters. West-facing windows cop the worst of the afternoon sun. If you’re building or renovating, limiting large glazed areas on the west and north-west is a smart move.
- Shading. Eaves, overhangs, verandahs, or even well-placed planting can dramatically reduce solar heat gain through windows on hot days.
- Window size. Bigger isn’t always better when it comes to sun-facing glass. Strategic sizing on exposed elevations keeps heat out.
Upgrade your windows and doors
Once you’ve done what you can with design, the glazing and frame specification does the heavy lifting. This is where uPVC joinery makes a real difference.
Standard aluminium frames are essentially thermal conductors — they transfer heat into your home readily. uPVC frames work very differently. The thermal conductivity of uPVC is around 0.17 W/mK, compared to 160 W/mK for aluminium. In plain terms, a uPVC frame stays cool to the touch on a hot day, rather than radiating heat into the room.
You can also specify glass with a lower Solar Heat Gain Coefficient (SHGC) — standard low-E glazing admits around 55% of solar heat, but upgraded glass can reduce that to around 35%. Combined with a uPVC frame, the difference inside your home is noticeable.
The Ambiance uPVC systems we supply and install at Livara offer R-values in the range of R0.7–R0.8, which is significantly better than standard aluminium. They also include tilt-and-turn window options, which are ideal for secure night-time ventilation — leaving windows partially open to purge warm air while remaining childproof and secure.
Ventilation: the last line of defence
Once you’ve reduced heat gain through design and glazing, ventilation handles whatever residual warmth remains:
- Cross-flow ventilation — openable windows at either end of a room let you flush warm air out when there’s a breeze.
- Tilt-and-turn functionality — lets you ventilate securely overnight, particularly useful on warm South Taranaki summer evenings.
It starts with the right windows
If you’re building new or replacing your joinery in South Taranaki, the windows and doors you choose will affect your home’s comfort every single day. High-performance uPVC joinery isn’t just about winter warmth — it’s a year-round comfort upgrade.
Get in touch with Livara for a free quote on Ambiance uPVC windows and doors for your South Taranaki home.