Thermawood Otago

What Thermawood Otago does

Thermawood Otago Limited is a privately held, locally owned glazing services company headquartered in Dunedin, New Zealand, with additional offices in Invercargill and Cromwell. The company specializes in retrofit double glazing for existing timber and aluminium window and door frames across the Otago and Southland regions, serving residential homeowners, heritage building owners, and small commercial property owners.

The company's core product is the patented Thermawood Retrofit Double Glazing System, a unique dry glazing system featuring a drainage adapter designed to prevent moisture-related failure of insulated glass units. The system is tested and approved to NZ Standard 4211:2008 for weather tightness. Supporting technical components include warm edge spacer technology, Low E glass options (Low E Max U-Value 1.71 and Low E Xcel U-Value 1.35), and argon gas-filled units. Complementary offerings include frameless glass showers, glass balustrades, glass splashbacks, custom mirrors, architectural glazing systems, leadlight preservation, rot repair, draught sealing, and pet door installation. The company is a member of WGANZ and the Glass Association of New Zealand.

Thermawood Otago operates a direct-to-consumer, quote-based revenue model with per-window or per-room pricing, supported by GEM Finance installment plans. Services are delivered on-site by skilled tradespeople, with windows typically removed, rebated, and reinstalled the same day. The company employs approximately 5 people, led by owner Matt Lamb with 20+ years of glass and joinery experience. No external funding, acquisitions, or AI-related capabilities are disclosed.

Name

Thermawood Otago

Legal name

Thermawood Otago Limited

Website

https://thermawoodotago.co.nz

Company type

Private

Operating status

Operating

Headcount range

1–10 employees

Short description

Thermawood Otago is a privately held New Zealand glazing company that installs patented retrofit double glazing systems into existing timber and aluminium window frames for residential, heritage, and small commercial customers across the Otago and Southland regions, with supplementary glass product and repair services.

Ownership category

akta.pro rank

Product category

Glazing Services

NAICS

Glass and Glazing Contractors (23815), Glass and Glazing Contractors (238150)

SIC

Glass Products, Made Of Purchased Glass (3231)

akta.pro primary industry

Architectural Glazing & Fenestration (Curtain Wall, Windows, Storefronts, Skylights) (IMAFAMAC)

akta.pro secondary industries

Window & Door Glass Replacement (IGU/Pane Only) (HSAPAJAE), Insulating Glass Units (IGUs) & Double/Triple Glazing (IMADAHAC), Glass & Glazing Repair (Single-pane, Insulated Glass Unit replacement) (HSAGAEAD), Architectural & Building Glazing Systems (Curtain Wall/Storefront/Canopies) (IMADAHAB)

Keywords

• Retrofit double glazing
• Timber window glazing
• Glass repair services
• Frameless glass showers
• Glass balustrades

Headquarters

HQ city

Dunedin

HQ country

New Zealand

HQ region

Oceania

Offices2 records

Markets served

GTM type

B2C

Offering type

Services

Cost components

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

Revenue model

1. Retrofit Double Glazing Installation: Installation of double glazed units into existing timber or aluminium window and door frames. Pricing offered per window or per room, allowing customers to retrofit within their own budget and timeframe.
2. Glass Repair and Glazing Services: Professional glass repair and glazing services including frameless glass showers, glass balustrades, glass splashbacks, mirrors, architectural glazing systems, and custom glass products.
3. Supplementary Services: Additional services including rot repair, draught sealing, leadlight preservation, hardware fittings, and pet door installation offered as add-ons to main glazing services.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Thermawood Otago specializes in retrofit double glazing installation for existing timber and aluminium window and door frames using the patented Thermawood Retrofit Double Glazing System. The company also provides complementary glass services including frameless glass showers, glass balustrades, splashbacks, mirrors, glass repair and reglazing, architectural glazing systems, leadlight preservation, rot repair, draught sealing, and pet door installation across the Otago and Southland regions.

Product overview

Thermawood Otago is a locally owned glazing services company operating across Otago and Southland with offices in Dunedin and Cromwell. The company's core product is the Thermawood Retrofit Double Glazing System, a patented system specifically designed for retrofitting double glazing into existing timber and aluminium window and door frames while preserving the character of original joinery. This core system is supported by a comprehensive suite of add-on services including frameless glass showers, glass balustrades, glass splashbacks, glass repair and reglazing, custom mirrors, architectural glazing systems, leadlight preservation, rot repair, draught sealing, and pet door installation. The company also offers specialized glass types including laminated, toughened, tinted, obscured/patterned, painted, coloured, screen printed, sandblasted, switchable, and Low E glass options (Low E Max and Low E Xcel). All glass work is fully compliant with the New Zealand Building Code, and the Thermawood system has been tested and approved to NZ Standard 4211. The company is a member of the Window & Glass Association of New Zealand (WGANZ) and the Glass Association of New Zealand.

Differentiator

Problem solved

Functional benefit

Products and services

• Thermawood Retrofit Double Glazing System
• Frameless Glass Showers
• Glass Balustrades
• Glass Splashbacks
• Glass Repair and Reglazing
• Custom Mirrors
• Architectural Glazing Systems
• Leadlight Preservation
• Rot Repair
• Draught Sealing
• Pet Door Installation
• Low E Glass Options
• Window Hardware Fittings

Quantifiable outcome

• Heat loss halved with standard double glazing compared to single glazed windows
• +3 more outcomes

Named customers7 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• Window & Glass Association of New Zealand (WGANZ)coreStrategic or Co-development PartnerThermawood Otago is a proud member of the Glass Association of New Zealand and the Window Association of New Zealand. These associations regulate the quality of products and services of industry members, provide industry insight, and help keep members up to date with legislative changes and innovation. Members must comply with all relevant mandatory standards under NZS4211.

Scale indicators2 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• Altherm: Major New Zealand manufacturer of aluminum window and door systems, owned by Fletcher Building. Competes with Thermawood Otago in the broader fenestration market as a substitute to retrofit double glazing, particularly for full window replacement projects and new construction.
• Glasshape: New Zealand specialty glass manufacturer producing architectural and transport glass products. Comparable in glass fabrication capabilities and range of specialty glass types, but focused on manufacturing rather than regional retrofit installation services.
• APL Window Solutions: New Zealand manufacturer and supplier of aluminum and uPVC window and door systems serving residential and commercial customers. Overlaps with Thermawood Otago on thermal performance benefits but competes primarily on the full-replacement side rather than retrofit into existing timber frames.
• Viridian Glass: Major glass manufacturer and supplier operating across Australia and New Zealand. Comparable in offering glass products including IGUs and Low E glass variants but positioned primarily as a vertically integrated glass supplier rather than a regional retrofit installer.
• Metro Glass: New Zealand's largest glass manufacturer and installer with nationwide coverage and a broad product portfolio including insulated glass units and architectural glazing. Comparable to Thermawood Otago in core glass installation but operating at substantially greater scale and a much wider geographic footprint.
• Frame Group: New Zealand aluminum joinery manufacturer producing window and door systems for residential and commercial construction. Competes with Thermawood Otago in the broader fenestration market, particularly for new-build and full window replacement projects.

Regional players

• Nuline Windows: Australian window and door manufacturer focused on east coast markets. Comparable in retrofit and replacement focus and product offering, but operating in Australia rather than New Zealand, providing a regional benchmark for the broader Thermawood network.

Others

• Mitre 10: New Zealand home improvement and hardware retailer with nationwide store network. Adjacent channel for DIY renovation and supplies rather than direct competitor for retrofit double glazing installation services.
• PlaceMakers: New Zealand's largest building materials retailer supplying windows, doors, and renovation products to trade and DIY customers. Adjacent channel rather than direct installation competitor, but influences how homeowners source window and glazing solutions.

Direct peers

• Thermawood: Thermawood Otago is a licensed operator of the Thermawood master system; other Thermawood licensees across New Zealand and Australia run comparable retrofit double glazing businesses using the same patented technology, drainage adapter, and warm-edge spacer processes. They are the most direct peers in product, customer, and operating model.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/thermawood-otago

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 Thermawood Otago