By Wellington Glass & Mirror
If your windows and doors are outdated, damaged, hard to open, or no longer performing in Wellington’s conditions, full aluminium replacement joinery with double glazing can be a smart upgrade.
This option can modernise your home, reduce maintenance, and improve comfort, energy efficiency, and everyday liveability.
At Wellington Glass & Mirror, we help homeowners across Wellington, Lower Hutt, Upper Hutt, Porirua, and the Kāpiti Coast find the right solution for their home. In some cases, retrofit double glazing or aluminium insert joinery are the best fit. In others, full aluminium replacement joinery gives you more flexibility, better performance, and greater design freedom.
What is full aluminium replacement double glazing?
Full aluminium replacement double glazing means removing the existing window or door unit completely and installing brand new double-glazed aluminium joinery in its place.
This differs from retrofit double glazing, where we keep the existing frames and upgrade them with new double-glazed units. Aluminium inserts sit between the two options. They replace old timber windows with aluminium joinery while keeping the original timber surrounds in the wall. Check out our blogs to learn more about what retrofit double glazing and aluminium insert vs timber retrofit double glazing.
Full replacement gives you the chance to start fresh. You can upgrade the glass, joinery configuration, colour, hardware, and thermal performance all at once.
For Wellington homeowners, this can be especially valuable in homes with ageing joinery, deteriorating timber, older aluminium frames, or layouts that no longer suit modern living.
Before & after replacing old aluminium with new full aluminium replacement joinery.
When is full replacement the right option?
Full replacement double glazing is often the best option when:
- Existing frames are damaged, rotten, warped or beyond repair
- Windows or doors are draughty, difficult to open, or no longer sealing properly
- You want to change the size, colour or function of an opening
- You want to modernise the look of your home
- You need a higher-performing solution for warmth, noise reduction, or weather resistance, e.g. changing old “cold” aluminium to new modern thermal aluminium windows and doors.
- You are renovating and want to improve indoor-outdoor flow at the same time i.e change a window to a door
Many homeowners first ask us about double glazing only. After an in-home consultation, they sometimes find that full replacement joinery with double glazing will deliver the better long-term result.
Can you change a window into a door?
Yes, in some cases, we can convert an existing window into a door as part of a full replacement project.
This can work well if you want better access to a deck, patio, or garden area. It can also improve the way a room functions. For example, we may replace a window in a dining or living space with a ranch slider or hinged door.
We can also replace old timber French doors with bifold or sliding doors. In some homes, we can replace old doors with side panels with bifold or stacking door sets to create much better indoor-outdoor flow.
Wellington Glass & Mirror works with qualified builders, so we can complete this type of work where appropriate.
Can you just replace some but not all windows or doors?
Yes. In many homes, the best result comes from combining different solutions.
For example, you may keep and retrofit windows that still have sound frames, while fully replacing one or two old ranch sliders or doors that have reached the end of their life. You may also replace French doors with a new sliding door or bifolds.
This kind of tailored approach can deliver strong performance while keeping the project practical and cost-effective.
Another popular option is upgrading the main entrance door in an older home. A new front door and side panel can modernise the home and add noticeable street appeal.
Replacement aluminium front door and double-glazed side panel, creating a modern, elegant front entrance.
Why Wellington homeowners choose full aluminium replacement joinery
Homes across Wellington and the surrounding region vary in age, style, and construction. That is why there is no one-size-fits-all solution.
Full aluminium replacement joinery with double glazing gives homeowners more design freedom. It also allows us to tailor the result to the specific needs of the home.
Many homeowners choose full replacement because they want to modernise the look of the home, improve function, and lift thermal performance. They also want to reduce maintenance, cut draughts, and improve weathertightness.
Modern aluminium joinery can include an insulating thermal break. This helps reduce heat transfer through the frame. Standard aluminium conducts heat and cold easily, which can lower insulation performance and attract condensation. A thermal break helps reduce that issue and supports a warmer, drier home.
At Wellington Glass & Mirror, we manufacture aluminium joinery in-house using profiles developed for New Zealand conditions. These profiles are powder coated or anodised locally and tested to New Zealand Standards for quality and durability.
Because we work locally, we understand the conditions Wellington homes face. Wind exposure, coastal air, temperature shifts, and older housing stock all shape the right solution.
What types of joinery can be used?
Depending on the home and the outcome you want to achieve, full replacement projects may include:
- Aluminium windows and doors
- Thermally enhanced aluminium joinery
- Sliding doors
- French doors
- Hinged and bifold doors
- Stacking doors
- Fixed panes, awning windows, and other modern window configurations
The right option will depend on the style of your home, your budget, and the kind of performance you are wanting to achieve.
During the consultation process, we look at how the home is oriented, how the spaces are used, and what matters most to you, whether that is warmth, lower maintenance, improved aesthetics, or a better connection to outdoor spaces.
The benefits of double glazing in a full replacement project
A full replacement joinery project allows you to pair new joinery with modern double glazing for a more complete upgrade.
Benefits include:
Improved warmth
Double glazing helps reduce heat loss compared with single glazing, which can help make the home feel warmer and more comfortable in winter.
Reduced condensation
While no glazing solution can eliminate condensation entirely in every situation, double glazing can help reduce the likelihood of condensation on the inside surface of glass by keeping the inside pane warmer. You can also read our winter home tips for Wellington for other practical ways to create a warmer, drier home.
Better acoustic comfort
For homes near busy roads, schools, transport routes or exposed neighbourhoods, the right double-glazing specification can help reduce outside noise and create a noticeably calmer indoor environment. As we explore in our blog on noise-reducing double glazing in Wellington, double glazing helps disrupt sound waves with two panes of glass and an air or gas-filled gap between them, and acoustic performance can be improved further with thicker glass, acoustic laminate or Hush glass, and high-performance draught seals.
Improved energy efficiency
A more thermally efficient window and door system can help support a more stable indoor temperature and reduce reliance on heating.
A cleaner, more modern finish
New windows and doors can dramatically refresh the appearance of a home and add value to a wider renovation.
What is the process?
At Wellington Glass & Mirror, we take a tailored approach to full aluminium replacement double glazing.
Our process typically begins with a consultation to assess the existing joinery, understand your goals, and identify the most suitable solution for your home.
From there, we can advise on:
- Whether retrofit, full replacement or a combination approach is the better option
- What types of windows or doors will suit the space
- Whether an opening can be changed from a window to a door
- What performance upgrades may be worth considering
- Any building requirements related to the work
Because every home is different, our role is to provide practical advice and recommend a solution that makes sense for the property, the homeowner, and the local conditions.
Is full replacement worth it?
If your windows or doors are in poor condition, no longer functioning well, or limiting how you use your home, full replacement joinery can be a worthwhile long-term investment.
It can update the appearance of the home, increase functionality and comfort, and create opportunities that simply are not possible with a basic glass-only upgrade.
For some homeowners, it is also the right time to future-proof the home by replacing ageing joinery before problems become more costly. If you are comparing lifespan and value, our blog on how long double glazing lasts in Wellington is worth a read. And if part of the issue is old or failed units, you may also find our article on replacing failed or old double glazing helpful.
If budget is part of the decision-making process, you can also explore our guide on double glazing costs in Wellington.
Talk to Wellington Glass & Mirror about full aluminium replacement joinery
If you are exploring full aluminium replacement joinery with double glazing in Wellington, we can help you assess whether it is the right fit for your home.
We also offer guidance on retrofit double glazing, aluminium inserts, and other glazing upgrades, so you can make a confident decision based on your home, your priorities, and your budget.
As a professional glass and glazing company as well as a Certified RetroGlaze® Partner, the team at Wellington Glass & Mirror are uniquely qualified to advise you on both optimal glass and glazing solutions as well as retrofit vs replacement joinery options. Get in touch with Wellington Glass & Mirror to arrange a consultation and explore the best solution for your windows and doors.