Safeguarding the Stars – ARDEX WeldTec® at Te Whatu Stardome

Under the Same Sky Since Childhood

For generations of Aucklanders, Stardome has been a place of wonder. School trips, family outings, and late nights spent watching the stars. But after years of exposure, the curved metal dome and roof began to fail. Leaks had spread, threatening the building and its heritage.

The Challenge

The ageing membrane roof had suffered from constant UV exposure and thermal movement. Seams had opened, fixings had loosened, and temporary repairs were no longer effective. A reliable, long-term waterproofing solution was needed for a complex structure that couldn’t afford downtime.

The Solution: ARDEX WPM 715 WeldTec® Membrane

ARDEX WPM 715 was chosen for its flexibility, strength, and proven UV resistance in New Zealand conditions. The weldable sheet membrane is designed for exposed roofing and can handle ongoing movement and maintenance traffic.

ARDEX certified applicator, installed the system under full scaffold containment. The membrane was heat-welded onsite, creating seamless joints across the roof, parapets, and around the copper domes without relying on tapes or adhesives. The result is a continuous, watertight surface built for decades of service.

Why ARDEX WPM 715

• Weldable seams for full watertight protection
• Flexible and durable for complex roof shapes
• UV and weather resistant for exposed use
• Suitable for foot traffic and long-term maintenance
• Backed by ARDEX technical support and warranty
• Track record of over 50 years durability

The Result

Te Whatu Stardome is now leak-free and protected for the future. ARDEX WPM 715 not only secured the roof but helped preserve a place where generations of Kiwis have learned to look up and dream.

Primary Contractor: DMP

Architect(s)/Consultant(s): Ignite Architects

Development Manager: Te Whatu Stardome

Waterproofer: IG Roofing