# NK Windows – uPVC Windows \& Doors: Warmer, quieter, safer homes for New Zealanders

> NK's high\-performance uPVC windows are all built to exact European standards for durability and to make homes warmer and more comfortable\.

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## Pages
- [Maintenance \& after\-care](https://nkwindows.co.nz/upvc-window-and-door-maintenance/)
- [Contact OLD](https://nkwindows.co.nz/contact-old/)
- [Maintenance \& after\-care \(Auckland\) new](https://nkwindows.co.nz/maintenance-after-care-auckland-new/)
- [Homepage: NK Windows \& Doors](https://nkwindows.co.nz/)
- [uPVC Windows \& Doors Specialist in Wellington](https://nkwindows.co.nz/showrooms/wellington/)

## Posts
- [NZ Building H1 Code Update: Why Your Window Choice Just Got More Critical](https://nkwindows.co.nz/news/nz-building-h1-code-update-why-your-window-choice-just-got-more-critical/)
- [Are uPVC and Double Glazed Windows Durable and Easy to Maintain?](https://nkwindows.co.nz/upvc-windows-durability-maintenance/)
- [25 Years of Making Windows Better](https://nkwindows.co.nz/news/25-years-of-making-windows-better/)
- [Do Energy\-Efficient Windows Keep Heat Out? \(Summer Performance Guide\)](https://nkwindows.co.nz/energy-efficient-windows-keep-heat-out/)
- [Should You Replace or Retrofit? Choosing the Best Window Upgrade](https://nkwindows.co.nz/full-window-replacement-vs-retrofit/)

## Products
- [9\.02 Doors \& Windows \- 4 panel, fixed/2 x sashes/fixed](https://nkwindows.co.nz/products/9-02-doors-windows-4-panel-fixed-2-x-sashes-fixed/)
- [9\.01 Doors \& Windows \- 2 panel, fixed, sash](https://nkwindows.co.nz/products/9-01-doors-2-panel-fixed-sash/)
- [8\.04 Doors \- IW window, 2 panel, fixed/sash](https://nkwindows.co.nz/products/8-04-doors-iw-window-2-panel-fixed-sash/)
- [8\.03 Doors \- 3 panel, fixed/sash/fixed](https://nkwindows.co.nz/products/8-03-doors-3-panel-fixed-sash-fixed/)
- [8\.02 Doors \- 3 panel, fixed/fixed/sash](https://nkwindows.co.nz/products/8-02-doors-3-panel-fixed-fixed-sash/)

## Case Studies
- [Christchurch Villa Renovation with uPVC Double Glazing](https://nkwindows.co.nz/case-studies/christchurch-villa/): How one Christchurch homeowner transformed an old style villa into a warm modern home but managed to retain all its original charm
- [Heathcote Valley Renovation with uPVC Double Glazing](https://nkwindows.co.nz/case-studies/heathcote-valley-renovation/): This Heathcote Valley project highlights how uPVC double glazing in Christchurch can transform not just how a home performs — but how it feels to live in every day\.

## Documents
- [](https://nkwindows.co.nz/document/10861/)
- [](https://nkwindows.co.nz/document/10862/)
- [](https://nkwindows.co.nz/document/10859/)
- [](https://nkwindows.co.nz/document/10860/)
- [](https://nkwindows.co.nz/document/10856/)

## Categories
- [uPVC](https://nkwindows.co.nz/category/upvc/)
- [Company News](https://nkwindows.co.nz/category/company-news/)
- [Windows](https://nkwindows.co.nz/category/windows/)
- [Uncategorized](https://nkwindows.co.nz/category/uncategorized/)
- [Maintenance](https://nkwindows.co.nz/category/maintenance/)

## Tags
- [Maintenance](https://nkwindows.co.nz/tag/maintenance/)
- [Renovation](https://nkwindows.co.nz/tag/renovation/)
- [Fixed windows](https://nkwindows.co.nz/tag/fixed-windows/)
- [Bifold doors](https://nkwindows.co.nz/tag/bifold-doors/)
- [new\-build](https://nkwindows.co.nz/tag/new-build/)

## Categories
- [All doors](https://nkwindows.co.nz/nk_products_cat/doors/)
- [Entrance doors](https://nkwindows.co.nz/nk_products_cat/entrance-doors/)
- [Tilt \& Turn inward opening](https://nkwindows.co.nz/nk_products_cat/inward-opening-tilt-turn/)
- [Sliding doors](https://nkwindows.co.nz/nk_products_cat/sliding-doors/)
- [Outward opening](https://nkwindows.co.nz/nk_products_cat/outward-opening/)

## Document Categories
- [Instructions](https://nkwindows.co.nz/document-category/instructions/)
- [Low threshold aluminium sill \(single seal\), inwards and outwards opeining](https://nkwindows.co.nz/document-category/entrance-french-doors/low-threshold-aluminium-sill-single-seal-inwards-and-outwards-opeining/)
- [Mid level slider with very good sealing, single opening or bi\-parting centre opening](https://nkwindows.co.nz/document-category/smart-slide/mid-level-slider-with-very-good-sealing-single-opening-or-bi-parting-centre-opening/)
- [Direct fixed, no exterior flange, inwards and outwards opening](https://nkwindows.co.nz/document-category/windows/direct-fixed-no-exterior-flange-inwards-and-outwards-opening/)
- [Mid level slider, raised threshold with very good sealing, tilt function on primary sash](https://nkwindows.co.nz/document-category/tilt-slide/mid-level-slider-raised-threshold-with-very-good-sealing-tilt-function-on-primary-sash/)

## Optional
- [Sitemap index](https://nkwindows.co.nz/sitemap_index.xml)