At NK, we know every project is as unique as the person behind it, so we work directly with you to create the best solutions for you. From the initial design consultation through to manufacturing and installation, our friendly and expert team will be with you every step of the way.
NK’s high-performance windows are all built to exacting European standards for durability and to make homes warmer and more comfortable: choose from fixed, sliding, outward opening, or combinations that include our versatile Tilt & Turn design.
From front doors, to bifolds, sliders and French doors, all our doors are expertly built, offer high levels of security and superior insulating properties that will reduce your home’s energy consumption to keep you cosy and safe all year round.
Work with one of our design advisors to create an impressive entrance. Whatever your style, we can create the door for you.
uPVC windows and doors provide superior insulation and security, boast greater durability, and require less maintenance, making them an energy-efficient and cost-effective choice for discerning homeowners worldwide.
0800 344 3126 | info@nkwindows.co.nz
17 Hammersmith Drive, Wigram, Christchurch 8042
04 384 9909 | info@nkwindows.co.nz
03 445 0172 | info@nkwindows.co.nz
Unit 1, 4A Ree Crescent, Cromwell 9310
Talk directly with one of our team and get a closer look at the quality and structure of our windows and doors.
Our team is ready to answer your questions, provide a quote, share insights, and help you choose the right products for your project.
See our Glossary for any terms you want to clarify
The uPVC profile undergoes precision cutting and welding, with steel insertion and the fitting, testing, and glazing of opening and locking hardware all taking place in our Christchurch factory. Our glass is custom processed and cut by Viridian Glass.
PVC is short for polyvinyl chloride, a type of plastic widely used in construction and various industries since the 1950s. uPVC, or unplasticised PVC, is a specific form of PVC that is highly suitable as a material for window frames.
Its versatility allows it to be used in diverse applications, ranging from window frames and pipes to medical products.
Absolutely. The roots of uPVC windows trace back to 1959 when the first commercially available windows graced homes in Germany. Over the years, technology has advanced, and yet, some of those initial uPVC windows are still standing strong. In fact, more than 60% of European homes now boast the reliability of uPVC windows and doors.
Yes. Viewed across its lifecycle, uPVC is highly competitive in terms of environmental impact. Several recent eco-efficiency and Life Cycle Assessment (LCA) studies on the most common applications show that, in terms of energy requirements and GWP (Global Warming Potential), uPVC is at least equal to alternative products. In many cases, it shows advantages both in terms of total energy consumption and lower CO2 emissions.
The core materials for uPVC production – chlorine and ethylene – are both by-products of other manufacturing processes. Chlorine is a by-product of caustic soda production with source raw materials of seawater and rock salt. Ethylene is a by-product of the petroleum refining industry i.e. PVC is not directly dependent on crude oil.
Our frames are also highly recyclable.
Absolutely. Our PVC profiles specifically engineered with New Zealand’s climate in mind, including those intense UV rays. The same robust formula stands resilient in other high UV environments such around the world, such as the Middle East, Australia and Latin America.
Definitely. Many of our customer projects involve renovations. We understand the importance of preserving character, and our robust uPVC frames are perfect for bungalows and villas.
Yes! We offer a full range of outward-opening windows, with traditional or contemporary styling. Find out more here
No. “uPVC windows” refers only to the frame material. We have access to the same glass options as any window supplier through our partnership with Viridian Glass based in Christchurch. Most common options include:
Regular cleaning and maintenance are essential for all windows, as they can accumulate stains and damage over time due to pollution, weather, and various other factors. By adhering to proper cleaning and maintenance guidelines, you can optimize the appearance, functionality, and longevity of your windows.
See our After-care section to assist you in caring for your windows.
Navigating the regulations for planning permission can be intricate and perplexing. Permitted Development offers the opportunity to undertake specific home development projects without planning permission. However, it is crucial to adhere to planning guidelines to prevent any costly errors. Contact our team to find out more.
Under normal circumstances you will not need a builder if replacing windows and doors, we will do the work required. However, we do not carry out structural work, so in that case, the services of a builder would be required.
Everything you need to know about choosing the right windows and doors for your project with tips and advice, resources and much more.