Isthmus Glass Ltd · Penrose
Isthmus IGU
IGU manufacturer first, installer second — supplies units to the trade and direct to homeowners.
- Trade
- Isthmus Glass Ltd
- Years trading
- 21
- GBI registered
- Yes
- WANZ aligned
- Yes
Profile
About Isthmus
Isthmus is one of two NZ-owned IGU manufacturing plants in Auckland. They supply other glaziers across the upper North Island and run a small direct retrofit team. Argon fill, warm-edge spacers, and low-E options are stocked rather than special-order — meaningful turnaround difference for jobs in the queue.
Specialities
- Retrofit IGU
- Full-frame
- New build
Known for
Stocked argon-filled warm-edge units — meaning a 2-3 week turnaround instead of the 5-7 weeks of import-dependent competitors.