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Double Glazing for Old Steel Framed Windows
Old steel framed windows are a beautiful feature in many New Zealand homes and heritage buildings. However, their single glazing often leads to poor insulation, increased noise, and rising energy bills. Magnetite’s retrofit double glazing for old steel framed windows is a smart, non-invasive solution that brings comfort, efficiency, and performance—without the need to replace your original windows.
Our retrofit system upgrades single-glazed steel windows into high-performing double glazed windows. Independent testing has shown up to 70% improvement in both noise reduction and thermal insulation. The result is a quieter, warmer, and more energy-efficient home, while retaining the timeless style of your steel-framed windows.
With over 25 years of industry experience, Magnetite provides expert double glazing for steel windows across New Zealand. Our licensed network of fabricators, estimators, and installers—primarily based in the North Island—ensures each project is tailored to your home and installed with care.
Request a QuoteWhy Retrofit Double Glazing for Steel Windows?
Retrofitting old steel framed windows with Magnetite double glazing helps you enjoy modern comfort without compromising character. It reduces unwanted noise, stabilises indoor temperatures, and cuts down on energy use—making your home more sustainable and cost-effective to run.
Unlike full window replacement, Magnetite’s award-winning retrofit system works with your existing frames, meaning less waste, lower costs, and no major disruption to your home.
Noice Reduction
Thermal Comfort
Energy Efficient
Fits Existing Windows
