Hamilton
Ryan Double Glazing has been retrofitting aluminium windows and doors across the Bay of Plenty and Waikato since 1994.
Retrofit Double Glazing Hamilton
Hamilton winters are no joke. The Waikato basin is known for cold, frosty mornings and persistent dampness that makes poorly insulated homes genuinely uncomfortable. For many Hamilton homeowners, single-glazed aluminium windows are one of the biggest contributors to heat loss, condensation and rising energy bills.
Ryan Double Glazing has been working across the Waikato for decades, and Hamilton is one of our most active service areas. We retrofit sealed double glazed units into your existing aluminium frames — it's faster and far more cost-effective than replacing your joinery entirely.
Why Hamilton Homes Need Double Glazing
Hamilton sits in a valley, and that geography means cold air settles overnight, frosts are common in winter, and homes that aren't well insulated struggle to stay warm. Many homes in established Hamilton suburbs like Claudelands, Hillcrest, Nawton and Chartwell have original aluminium windows that were installed before double glazing became standard — and they show it.
Common signs your Hamilton home is ready for a retrofit include heavy condensation on windows in the morning, rooms that are cold even with the heat pump running, and curtains that never quite dry out over winter.
What We Do in Hamilton
We replace your existing single pane glass with sealed double glazed units, using LowE glass and argon gas where appropriate. The job is typically done in a day, with no mess and no need to replace your frames. We'll also replace worn window seals and stays at the same time, so your windows perform like new.
Learn more about the benefits of double glazing, see how the process works, or get in touch for a free Hamilton quote today.


My name is Chris,
give me a call
I stand by it!