Transform your existing timber windows with modern efficiency while preserving their original character
Retrofit to double glazing is the process of upgrades your existing timber windows by replacing old single glass with modern double-glazed units.
This method improves insulation, comfort, and energy efficiency — without removing your original timber frames.
See how we've transformed timber windows while preserving their original character and charm.
See the dramatic difference between old single glazed and new double glazed windows. The transformation maintains original character while dramatically improving efficiency.
Keep your original timber joinery and heritage details.
Stay warmer in winter and cooler in summer thanks to better insulation and Low-E glass options.
Lower heating and cooling bills by reducing heat loss and gain.
Cut down outdoor noise for a more peaceful home.
Retrofitting is more affordable than full window replacement.
Reusing existing frames means less waste and a smaller environmental footprint.
Classic double glazing is made of two panes of glass separated by a sealed air or gas layer. It's the most common and cost-effective way to improve the comfort and energy efficiency of older windows - especially in timber homes.
Low-E (Low Emissivity) double glazing takes everything good about standard double glazing - and makes it even more efficient. It uses a special invisible coating that controls how heat and light move through your windows. This coating reflects heat energy while still allowing plenty of natural light to pass through - keeping your home warmer in winter and cooler in summer.
Experience the difference that true craftsmanship and expertise make in every retrofit project.
Retrofits frequently stall because of timber problems. If repairs are required, we are qualified in timber joinery and can complete the repairs with precision—saving homeowners time and the hassle of looking elsewhere.
Our retrofitting is the highest quality on the market. We use the same methods professional timber joiners use to manufacture new joinery to NZ standards, ensuring lasting performance.
Care, precision, and pride in every piece. We bring a craftsman's mindset to every job, taking ownership of the result and ensuring it performs beautifully for years to come.
We stand by our work. Each retrofit is built with the same commitment and integrity that define true timber joinery — because we treat your home as we would our own.
A proven 4-step process that transforms your existing timber windows while preserving their original character.
We'll visit your property to inspect your existing timber windows and take precise measurements for the retrofit.
Each double-glazed unit is manufactured to exact specifications for a perfect fit and optimal performance.
The old single glass is carefully removed, and your existing timber frames are expertly routed to accommodate the new insulated glass units.
Your new double-glazed glass is securely sealed into place. All removed materials are responsibly recycled, leaving your windows looking original but performing like new.
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Professional assessment and precise measurements
Ready to upgrade your windows? Get a detailed quote for your retrofit double glazing project.
Real feedback from satisfied customers who chose our retrofit double glazing services.
"We used Lambert to fix a very rotten window sill and repair some doors which were jammed shut. He was fantastic to deal with and we were very happy with the final result. Excellent communication and detail oriented. Looking forward to having more work completed by Lambert in the future."
Jackie Williams
Auckland
"Very quick to get back to me after query about my back door. Did fantastic job of fixing it. Got him back to install draws where the dishwasher was. Again did a fantastic job. Very reasonable prices for both jobs. Would highly recommend."
Anita Girvan
Auckland
"Great service and awesome workmanship! Attention to detail was fantastic. Will definitely use Lambert again. Very pleased."
Ivan Flynn
Auckland