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uPVC Windows & Doors Upper South Island

Making kiwi homes warmer, safer and quieter

  • NK Windows has been supplying and installing high-performance windows and doors for new builds and renovations across the Upper South Island for over 20 years

Premium uPVC windows and doors for homes in Christchurch and across the Upper South Island

Homeowners have been trusting us to deliver modern living environments that designed to perform for years to come for the past 20 years. Heres why: 

  • Outstanding thermal performance
  • Enhanced security and safety
  • Excellent sound reduction
  • Premium European design and engineering
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Our services

From Tasman and Marlborough to the West Coast and all of Canterbury, we work with homeowners, developers, architects and builders to enhance homes with high-performance uPVC windows that are designed for comfort, efficiency and style.

  • Retrofit windows and doors
  • Replacement windows and doors
  • New build window installations
  • New build door installations
  • Architectural installations
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Renovate with uPVC windows and upgrade to comfortable living

Thinking about replacing your timber or aluminium windows? Modern uPVC windows can transform the comfort of your home by making it warmer, quieter and more secure.

Ask our friendly team for a copy of our free uPVC Window Renovation Guide to learn everything you need to know about upgrading your windows – from choosing the right styles to understanding the installation process and what to expect along the way.

The benefits of NK Windows

Enhanced comfort

Eliminate draughts and cold spots. uPVC windows provide outstanding insulation, maintaining a cosy home during winter and keep it cool in summer, reducing heat loss for year-round comfort.

Healthier environment

Safeguard your home from condensation, mould, and damp. Our uPVC windows feature moisture drainage systems that prevent build-up, creating a cleaner, healthier living space.

Energy savings

Cut down on costs with our energy-efficient uPVC windows. Insulative properties reduce heat transfer, minimising the need for heating or cooling and keeping your bills lower.

Low maintenance

Enjoy windows that require little upkeep. uPVC frames are built to last without rotting, warping, or fading, so there’s no need for repainting or staining.

Reduced noise

Experience a quieter home: uPVC windows offer excellent sound-proofing, ideal for busy streets, reducing outside noise for a more peaceful living environment.

Improved security

Keep your home safe: uPVC windows offer enhanced security. Reinforced frames and multi-point locking systems provide strong protection for peace of mind.

A recent renovation project in Christchurch

Don’t just take our word for it...

Wayne Mackay
Wayne Mackay
★★★★★
Excellent experience
We had an excellent experience with NK windows, from Tani doing the quote to the final tweeks, They were very accomodating and the install guys did an excellent job, feels like a new house, would highly recommend the team to everybody.
Roslyn Whitley
Roslyn Whitley
★★★★★
Exemplar service
I cannot thank Martin and his team at NK Windows enough for the exemplar service they have provided. Right from the beginning, NK Windows showed exceptional professionalism through ongoing communication of updates, scheduling of work and guidance on how to prepare for installation. The work was completed well within the time frame provided and the contractors were so friendly, they cleaned the windows so well at the end I questioned whether the glass was installed!! The windows look absolutely amazing and have transformed and modernised my 1950's home. For anyone wanting a fast, efficient and professional service, I would recommend NK Windows as your go to company.
Phil Smith
Phil Smith
★★★★★
Exceptional products
Our immediate thoughts were "our house no longer feels like it's leaking heat". Exceptional products that significantly outperform our 15 year old double-glazed aluminium windows. No more condensation. Tilt & turn windows and doors means we can securely ventilate ... and no longer run the risk of kids hitting their heads on an open window! I suggest you have a close look at glass options ... to reduce summer overheating we opted for Performatech206 on north and west faces. Standard Low E & Argon on all other windows.
Elena and Alex
Elena and Alex
★★★★★
Accommodated all our requests
Can highly recommend NK Windows to anyone who wants high performance glazing on their house. Tani and the team were a pleasure to deal with, and accommodated all our requests. Easy and professional install, thanks again!I suggest you have a close look at glass options ... to reduce summer overheating we opted for Performatech206 on north and west faces. Standard Low E & Argon on all other windows.
A Topp
A Topp
★★★★★
Zero moisture
...Now that we have had many months of all weather, I can say categorically that we have had zero, absolutely zero moisture on the inside of our new uPVC windows. They always feel warm and dry. It has definitely improved the temperature and comfort in the house, even in the room furthest away from the heatpump. If I have one regret, it's that we couldn't afford to exchange the entire houselot of windows and ranchsliders: uPVC is clearly hugely superior to the aluminium that's mysteriously still being used NZ-wide. If you have a choice, if you can afford to build, you'd be crazy to choose aluminium. Tania was incredibly patient working with us through several quotes to see just how much we could afford to do. Installation day went off without a hitch. Couldn't recommend these windows, and this company more.
Kat Dodd
Kat Dodd
★★★★★
Stress free experience
We had such an amazing, stress-free experience with NK windows. Tani is wonderful and a real asset to the firm. She explained everything so clearly and at great details and was super flexible when we wanted to make changes to the plan. She oversaw the project and was always available, always super helpful and accomodating. The crew who installed the windows and doors was professional and the work they did was spotless. The after-care was also top-notch. The product itself is just superior and really transformed our house. Overall, we could not be happier with the service we got from NK, and we cannot recommend them highly enough.
Alicia Moggre
Alicia Moggre
★★★★★
Professionalism and knowledge
We just had 8 windows and a new door installed by NK windows, and immediately notice the increased warmth and decreased noise inside the house. The windows look good and the opening tilt and swing hardware works really well. Particularly impressed by the professionalism and knowledge of the people we dealt with from the initial quote to the detailed measure and the final installation. The install guys were happy to answer all my questions and kept everything very tidy while installing as well, great attention to detail. PVC windows are the way to go, and we picked NK windows because we liked that they have their own NZ based factory to make sure windows are made for NZ building requirements and that they complete the install as well so it was easy, and we knew it was done right for the window requirements.
Jan and Lydia
Jan and Lydia
★★★★★
Eagle-eye for attention
It struck me again, when you recently called after-hours with some updates on our window schedule, how much effort you are putting into this for us. I'd just like you to know how much we appreciate your eagle-eye for attention to detail, your lateral thinking, helpful suggestions and your willingness to keep suggesting ways to make things more affordable for us. In this challenging period we are going though at the moment, trying to settle on a design for a thermally-efficient new home which we can afford, dealing with you is such a positive experience.

Upper South Island (Head office)

Tasman, Marlborough, West Coast, and Canterbury
03 344 3126
17 Hammersmith Drive, Wigram, Christchurch 8042
Open Monday-Friday, 9am-5pm
Mark Barnes

Mark Barnes

Renovation Sales

Gavin Brindley

New Build Sales

NK Windows, based in Christchurch, specializes in providing high-quality uPVC windows and doors, offering expertly crafted, energy-efficient solutions to enhance the style and comfort of homes across the region.

Contact our Christchurch and Upper South Island team for more information or a free quote

Let us help you create a warmer, healthier, and more comfortable living space