Retrofit double glazing
Retrofit double glazing fits most existing aluminium joinery — new-home comfort without new-home windows.
What is retrofit double glazing?
Retrofit double glazing replaces the single glass in your existing aluminium windows and doors with double glazed glass, usually without replacing the frames. It suits Northland homes that feel cold, damp or noisy, or get condensation on the windows. We measure, make and install it with our own team, and the quote is free.
Imagine the possibilities: a warmer, drier, healthier home, usually without replacing a single frame. Retrofit double glazing slots into your existing aluminium joinery, so you get new-home comfort without the cost or mess of new-home windows.
We measure on site, manufacture to fit, and install with minimal disruption — yours can be warmer too.
- Fits into your existing aluminium frames — usually no reframing
- Warmer, drier, quieter rooms year-round
- Reduces condensation and heat loss
- Measured and installed by our own team
How it works
Free measure and quote
We usually come to your home within a week, measure each aluminium window and door, and give you a free quote.
Made to fit
We make the double glazed glass to NZ standards, cut to the exact size of your existing frames.
Installed by our own team
We take out the single glass and fit the new double glazing into your frames, with minimal disruption.
A warmer, quieter home
Warmer, drier, quieter rooms year-round, with less condensation and heat loss.
Is my window suitable?
Retrofit double glazing works with aluminium joinery only.
| Window or door | Can we retrofit it? |
|---|---|
| Aluminium windows | Yes |
| Aluminium doors | Yes |
| Timber windows and doors | No, we don't retrofit timber |
What affects the price?
Every home is different, so we measure first and quote after. The price depends on:
| Factor | Why it matters |
|---|---|
| Number of windows and doors | More openings means more glass to make and fit. |
| Size of each window | Bigger panes take more glass and more handling. |
| Glass type | The glass you choose for each window changes the cost. |
| Access | Upstairs or hard-to-reach windows take longer to fit. |
| Distance from our Waipapa workshop | Jobs further out take more travel time. |
The measure and quote are free.
Retrofit double glazing questions
How much does retrofit double glazing cost?
It depends on how many windows and doors you have, their size, the glass type, access, and how far you are from our Waipapa workshop. We measure your home for free and give you a quote before any work starts.
How long does retrofit double glazing take?
We usually come and measure within a week. How long the installation takes depends on the size and complexity of the job, and how far it is from our Waipapa workshop.
Can you double glaze timber windows?
No. We retrofit double glazing into aluminium windows and doors only. We don't retrofit timber joinery.
Do I need new window frames?
Usually not. Retrofit double glazing normally fits into your existing aluminium frames, but it depends on the age of your joinery. We check this when we measure, before you get a quote.
What glass do you use?
All our double glazed glass is made to NZ standards and cut to the exact size of your frames.
Which areas do you cover?
Kerikeri, the Bay of Islands and the rest of Northland, from our workshop at 40 Klinac Lane, Waipapa.
Why choose Bay Glass Kerikeri?
Quality work from experienced staff, our own installation team, and a 1-year workmanship warranty on all our work. We're rated 4.9 from 57 Google reviews.
Ready to bring your space to life?
Tell us what you're picturing and we'll measure, quote and make it — free, no obligation.