NK Windows

What NK Windows does

NK Windows Ltd is a privately held New Zealand manufacturer and retailer of uPVC windows and doors, founded in 2000 and headquartered in Wigram, Christchurch. The company imports aluplast GmbH Ideal 4000 series profiles from Germany and combines them with Viridian Glass (double and triple glazing with argon and Low-E), MACO and Roto Frank hardware, and Thermix warm edge spacers to produce high-performance, thermal- and acoustic-insulated window and door systems at its Christchurch factory. Frames are mitred and PVC-welded with steel insertion, then glazed and assembled in-house, with finishing, fitting, and testing performed on site before delivery.

NK Windows serves a primarily residential customer base across New Zealand, segmented into renovation homeowners, new-build homeowners, architects and builders, and coastal-environment homeowners. Products span Tilt & Turn, outward opening, sliding and fixed windows, plus entrance, single, French, sliding, and bifold doors, all available with double or triple glazing. The go-to-market is direct-to-consumer and consultative: three company-owned showrooms in Christchurch, Wellington, and Auckland, free in-home consultations, custom project quoting, and in-house installation crews rather than third-party contractors. Pricing is project-specific and not publicly listed, with green loan financing facilitated through partnerships with Westpac, ANZ, ASB, and Kiwibank to remove upfront cost barriers. NK Windows holds BRANZ Appraised and SiteSafe approval, and partners with Homestar (NZ Green Building Council) and the Superhome Movement to support code-compliant, sustainability-rated residential construction.

Name

NK Windows

Legal name

NK Windows Ltd

Website

https://nkwindows.co.nz

Company type

Private

Founded year

2000

Operating status

Operating

Headcount range

11–50 employees

Short description

NK Windows is a New Zealand manufacturer and direct retailer of uPVC-framed, double- and triple-glazed windows and doors, serving residential renovation and new-build customers nationwide through showrooms in Christchurch, Wellington, and Auckland.

Ownership category

akta.pro rank

Product category

uPVC Windows and Doors Manufacturing

NAICS

Glass and Glazing Contractors (238150)

SIC

Glass Products, Made Of Purchased Glass (3231)

akta.pro primary industry

Windows (IMADAIAC)

akta.pro secondary industry

Custom Window & Door Fabrication & Replacement (HSAPAJAI)

Keywords

• UPVC windows and doors
• Double glazing solutions
• Energy efficient windows
• Residential window manufacturing
• Window installation services

Headquarters

HQ city

Wigram

HQ country

New Zealand

HQ region

Oceania

Offices3 records

Markets served

GTM type

B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Infrastructure, Marketing or Sales

Revenue model

1. uPVC Window and Door Product Sales: NK Windows manufactures and sells uPVC-framed double and triple-glazed windows and doors. Customers are homeowners, builders, and architects purchasing window and door units for new builds and renovations. Pricing is project-specific, requiring a consultation and quote. The product sale typically includes the manufactured frames and glazing.
2. Installation Services: NK Windows provides full installation services from site measurement through to installation and handover, managing the entire process without requiring a builder for standard replacements. Installation is bundled with the product sale.
3. 0% Interest Green Loan Facilitation: NK Windows facilitates green loan financing from major New Zealand banks (Westpac 0% pa, ANZ 1% pa, ASB, Kiwibank) to enable homeowners to upgrade with no upfront cost. While interest is paid to the bank, NK Windows benefits by enabling higher-value sales and broader customer accessibility.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels8 records

Core offering

NK Windows manufactures, sells, and installs premium uPVC-framed double and triple-glazed windows and doors for New Zealand residential properties. The company operates its own Christchurch factory where it welds aluplast German profile frames, integrates Viridian Glass glazing with Low-E and argon gas fills, and assembles Roto and MACO hardware. Products are sold through three company showrooms with in-home consultations and installed by NK Windows' own crews.

Product overview

NK Windows is a New Zealand uPVC windows and doors manufacturer offering a comprehensive product portfolio built around its Christchurch-based manufacturing operation. The core product line consists of uPVC window systems (Tilt & Turn, outward opening, sliding, and fixed windows) and uPVC door systems (entrance, single, French, sliding, and bifold doors), all available with double or triple glazing. The company differentiates through aluplast GmbH Ideal 4000 series profile technology and precision welding at its factory. Glazing is sourced through Viridian Glass and includes LightBridge double glazing with argon and Low-E coatings as standard. Hardware suppliers include Maco (inward-opening windows, entrance doors, sliders) and Roto Frank (sliding doors). Supporting offerings include green loan financing partnerships with major NZ banks and an online energy savings calculator. All products are designed for New Zealand's climate, meeting or exceeding NZ Building Code H1 energy efficiency standards with R-values that satisfy Zone 5-6 requirements of R0.50.

Differentiator

Problem solved

Functional benefit

Quantifiable outcome

• Up to 50% energy cost savings compared to single-glazed or older aluminium windows
• +6 more outcomes

Named customers8 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Seven partnerships are on record, tiered core, minor and moderate.

• aluplast GmbHcoreTechnology or Integrationaluplast GmbH is a premium German uPVC profile supplier based in Karlsruhe, Germany. They provide NK Windows with the Ideal 4000 series of uPVC profiles — the core structural component of NK's window and door frames. aluplast engineers profiles specifically suited for Australasian climate conditions, including high-UV environments. NK Windows management visited aluplast's headquarters in Germany in 2024 to strengthen the partnership and preview new profile designs in development.
• Viridian GlasscoreTechnology or IntegrationViridian Glass is one of New Zealand's largest and most trusted providers of residential and commercial glazing. They supply custom-processed and cut glass to NK Windows for integration into uPVC window and door units. Viridian provides the full range of glass options including LightBridge Double Glazing with argon and Low-E, laminated glass, obscure glass, and tinted glass. Viridian is described as reflecting NK Windows' commitment to reliability and excellence in the local market.
• MACO (Maco International)coreTechnology or IntegrationMACO is a global leader in window and door hardware based in Salzburg, Austria. They supply high-quality fittings for NK Windows' inward-opening windows, entrance doors, and sliders. MACO is known for innovative, secure, and energy-efficient hardware solutions. NK Windows management visited MACO's facilities in 2024 alongside the aluplast partnership, noting MACO's automation capabilities and commitment to quality.
• Roto FrankcoreTechnology or IntegrationRoto Frank, founded in 1935 in Germany, is the inventor of Tilt & Turn window opening technology. NK Windows partners with Roto for sliding door solutions, benefiting from their extensive and innovative product range. NK's management visited Roto near Stuttgart, Germany in 2024 to strengthen the partnership and discuss future product developments.
• SiteSafeminorOthersSiteSafe is a New Zealand organisation focused on construction safety. NK Windows is SiteSafe approved, ensuring all their construction and installation practices meet the highest safety standards. This partnership reflects NK Windows' commitment to staff safety — ensuring workers return home safely every night.
• New Zealand Green Building Council / HomestarmoderateStrategic or Co-development PartnerThe NZ Green Building Council runs the Homestar rating system, an independent national rating tool measuring the health, warmth, and efficiency of New Zealand houses on a scale from 6 to 10. NK Windows collaborates with Homestar to help homeowners achieve superior quality ratings — a Homestar 6+ home is warmer, drier, healthier, and more cost-effective than a typical building code-compliant home.
• Superhome Movement / NZ Certified BuildersmoderateStrategic or Co-development PartnerThe Superhome Movement is a not-for-profit organisation on a mission to transform the New Zealand building industry through healthier, more energy-efficient homes. NK Windows is a Bronze Partner and sponsor of the Superhome Movement, aligning their values of health, comfort, sustainability, and affordability with a collaborative network of industry professionals.

Scale indicators5 records

Recent moves7 records

Expansion highlights6 records

Broad incumbents

• Pella Corporation: Major US-based window and door manufacturer with direct-to-homeowner sales, custom fabrication, and showroom network. Comparable in consultative sales process, custom project pricing, and full-service installation; useful analog for a scaled-up version of NK's premium homeowner model.
• JELD-WEN: Global windows and doors manufacturer with operations across multiple materials and geographies. Comparable diversified product portfolio and broad residential channel, relevant as a global benchmark for window/door manufacturing scale economics against NK's specialty positioning.
• Milgard Windows & Doors: US-based window and door manufacturer serving residential new construction and replacement markets with multi-material product lines. Comparable in replacement-window focus, energy-efficiency value proposition, and builder/architect channel relationships, though serving a far larger geographic footprint.
• Andersen Corporation: One of North America's largest window and door manufacturers with national distribution, dealer network, and multi-material product lines. Comparable in custom high-performance residential window positioning and emphasis on energy efficiency, though at substantially larger scale.
• VELUX: Global leader in roof windows and skylights with established NZ presence. Adjacent comparable as a premium European-engineered daylight/ventilation product specialist operating in NZ residential construction, addressing overlapping homeowner renovation and energy-efficiency use cases despite the narrower product scope.
• First Windows & Doors: Established New Zealand window and door manufacturer serving residential and commercial markets. Comparable to NK in product category and NZ market presence, but with a broader product portfolio and larger installed base across traditional framing materials.
• Altherm: New Zealand's largest window and door manufacturer, primarily aluminum-based with national distribution and a builder-focused channel. Directly comparable in product category and residential construction customer base, but operates broader portfolio (aluminum joinery, commercial, retail) at greater scale than NK's uPVC specialty.
• Nulook Windows & Doors: New Zealand window systems company with national distribution. Serves the same residential renovation and new build segments as NK Windows with overlapping product categories, but historically anchored in aluminum joinery with broader general positioning rather than uPVC specialty.

Direct peers

• Internorm: Austrian premium uPVC window and door manufacturer with an integrated European supply chain and international showroom model. Highly comparable to NK Windows in product material, premium positioning, factory-direct custom fabrication, and full-service consultation-to-installation delivery, though at much greater geographic scale.

Others

• REHAU Windows: German polymer and uPVC profile manufacturer supplying window systems globally, including Australasia. Closely comparable technology stack to NK's aluplast sourcing model (German uPVC profiles for window fabrication) and shapes the supplier ecosystem NK competes within.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/NKWindows

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about NK Windows