Full replacement
Why choose full replacement.
A full replacement swaps the entire window or door, frame and all, for a new aluminium unit. It's the right call when the existing joinery is past saving, when you're changing the size or style of an opening, or when you simply want the cleanest, longest-lasting result. Old steel and timber comes out, new thermally broken aluminium goes in, and we make good around the new frame.
Lower energy bills
Moving from single glazing to Low-E double glazing in a thermally broken frame can cut heat loss through the window by up to 73%.*
Improved comfort
Eliminate the drafts and cold spots that tired joinery lets in, for a home that holds its temperature year-round.
Enhanced security
New joinery comes with modern multi-point locking and stronger frames than the units they replace.
Noise reduction
Double glazing significantly reduces external noise, ideal for homes near busy roads.
Increased home value
Modern, efficient aluminium joinery improves curb appeal and is a genuine selling point.
Decades of low maintenance
Powder-coated aluminium won't rot, warp or need repainting the way timber and steel joinery does.
*Estimated heat-loss reduction through the window versus single-glazed, non-thermally-broken aluminium. Actual performance depends on window size, glass configuration and install quality, and does not represent total household energy savings.
How it works
Full replacement, step by step.
01
Remove the old joinery
The existing windows or doors come out back to the structural framing, and the old units are taken away and disposed of.
02
Fit the new units
New thermally broken aluminium frames are packed, squared and fixed into each opening.
03
Weather-seal and make good
We flash, seal and tidy the reveals so every opening is weather-tight and finished.
Real transformations
Drag to see the difference.
Genuine Christchurch jobs, with old single-glazed joinery replaced by thermally broken aluminium. Drag the handle to reveal the before and after.
Full window replacementTired single-glazed windows swapped for thermally broken aluminium.
Is it right for you?
A good fit when…
Aluminium or steel joinery at the end of its life
Rotten or out-of-square timber frames
Resizing or restyling an opening
Whole-house upgrades for maximum performance
If your timber frames are sound and you want to keep the original interior trims, an insert window can deliver double glazing for less.
The other two ways
Insert
Insert windows
Keep the timber surrounds that give your villa or bungalow its character, and drop new thermally broken aluminium sashes straight into the existing frames. The look stays the same while the performance leaps forward.
Explore →New build
New-build joinery
Full aluminium window-and-door packages for new homes, engineered to your plans and delivered to the build programme. We work direct with architects, builders and homeowners, from shop drawings through to delivery on site, ready for your build team to install.
Explore →The process
Five steps. No surprises.
From the first phone call to the final sign-off, you'll deal with one Lume team. No project-manager middlemen, no being passed around.
01
Get in touch
Reply in 2 working days
A friendly chat about your needs, style and budget, then we book a free, no-obligation site visit. Prefer to start remotely? Send drawings or a few photos.
Free, no-obligation enquiry
We talk through style and budget
Book a site visit, or send plans and photos
02
On-site measure
1–2 hours on site
Free site visit anywhere in greater Christchurch. We measure twice, talk through hardware and finishes.
Free on-site consultation
Precise measure of every opening
Glazing, hardware and colour options
03
Fixed quote
1–3 business days
Itemised by opening. No surprises. Includes glazing, hardware, install and dispose-of-old.
Detailed written quote
A clear price per opening
No hidden costs
04
Fabricate
3–6 weeks
Made in Christchurch from aluminium sourced locally, right here in NZ. Powder-coat in the colour you specified.
Custom-built to your measurements
Powder-coat in your chosen finish
Quality-checked before dispatch
05
Install + sign-off
1–3 days on site
Our team installs and weather-seals. We don't leave until you've inspected and signed off.
Careful removal and dispose-of-old
Precise fitting and weather-sealing
You inspect and sign off
Warranty and ongoing support
Our suites
Two systems. Specced for your job.
Both share the same frame profile and hardware family: pick by thermal performance and opening size. We'll spec the right one during quote.
300 Series
Standard residential
Our everyday suite for homes and apartments. Solid performance without the premium price tag.
Energy-efficient double glazing
A range of colours and finishes
Low-maintenance aluminium frames
Tested to meet or exceed NZS4211 for Very High Wind Zones
800 Series Thermal
Thermally broken
Aluminium with a polyamide thermal break. Cuts frame heat loss by up to 60%, eliminating cold spots and reducing condensation, and future-proofed for tighter H1 requirements.
Thermal break reduces heat loss
Warmer rooms and lower power bills
Eliminates cold spots and reduces condensation risk
Future-proofs your home for tighter H1 rules
Let's price your full replacement.
Send drawings or a few photos and we'll come back inside three working days with a starting range. Free, no obligation.
