Windows - rebate

Window rebate/insert replacement joinery

Love the look of your original timber window frames but want the comfort and efficiency of modern air tight windows? Rebate/insert windows are a great option. They fit right into your existing timber frames—so you keep the charm of your home, while getting the benefits of maintenance free aluminium frames and double glazing. No major renovations needed.
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Upgrade your windows and keep the same character

By fitting new aluminium joinery into your existing rebate, this method enhances insulation, durability, and aesthetics while minimising disruption. Upgrade to double glazing for even better energy efficiency and year-round comfort. With Ultimate Design and Renovation's 40 series architectural frame, you'll get all the benefits of modern aluminium windows, but still keep the character look.
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Increased insulation
Improve the warmth of your home and reduce heat loss with double glazing, keeping your space comfortable all year round.
Character and durability
Designed to seamlessly match your home’s character, they offer superior durability, resist weathering and require minimal maintenance.
Our work

Before and afters

A smarter way to upgrade

This method enhances performance while reducing costs and installation time. Enjoy the benefits of stronger materials, improved functionality and a refreshed look.
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Faster installation
By fitting new aluminium frames into the existing rebate, installation is quicker and less invasive than a full window replacement.
Cost effective
Avoid the expense of structural changes while still upgrading to durable, high-performing aluminium frames.
Added security
New aluminium joinery features advanced locking systems, providing better protection and peace of mind for your home.
Testimonials

Customer testimonials

“Fabulous in every way! We got quite a few quotes for new windows/doors and the products & quotes varied greatly. In the end we went with Ultimate Design because they offered a top quality product, they were very professional and presented us with a very appealing quote saving us thousands of $$$$.”
Shelley H.
“Thank you Fordy for your service and communication over the past 2 years. We had all our windows and sliding doors replaced with double glaze. I even got my dream black mirrored front door and smart lock. Hubby is still recovering from the cost of that door! Anyway, I will continue recommending your company!”
Deidre L.
“We were very impressed with the design advice for our new conservatory and found it easy to envisage how it would look. Construction was very quick, surprising our friends who commented "it's in already?" The completed project complements the existing layout and looks as if it was installed as part of the house rather than as an addition.”
Garry H.
"Love my new door. Replaced my rotting wooden door with a dodgy lock with a sleek, super low maintenance aluminium set. It was an easy process from quote to installation. Hannah nailed the colours and the builders were a pleasure to have on site. Highly recommend these guys for similar renovation work."
Lesley Isaac
"Ultimate Design & Renovation Ltd did an amazing job! Hannah was fantastic to deal with—professional, friendly, and always helpful. We absolutely love our new doors; the quality and craftsmanship are outstanding. Highly recommend their services!"
George Hammond
Get in touch

Designed for comfort, built for Kiwi living

For all your renovation and double glazing needs, trust Ultimate Design.
Contact usVisit our showroom
Get in touch

Designed for comfort, built for Kiwi living

For all your renovation and double glazing needs, trust Ultimate Design.
Contact usVisit our showroom
Contact us
Designed for comfort,
built for Kiwi living
For all your renovation and double glazing needs, trust Ultimate Design.
Contact us for a quote