What Double Glazing Network does

Double Glazing Network (DGN) is a UK-based online lead-generation and referral platform founded in 2014 that connects residential homeowners with vetted, FENSA-approved local installers of Liniar uPVC windows, doors, and conservatories. DGN does not manufacture or sell products directly; it is operated by parent company TruFrame Trade Frames Ltd (legal entity TruFrame Ltd, Companies House number 10046544, registered 2016), which is described as the UK's largest fabricator of Liniar windows and doors. The platform's role is to capture UK homeowner demand through postcode-based installer search, an online quote builder (quote-builder.co.uk/DGN), and SEO-driven blog content, then route that demand into the TruFrame/Liniar installer network.

The underlying product portfolio spans the full Liniar range: casement, French casement, flush sash, sliding sash, tilt and turn, and the premium Refine windows; plus front, residential, composite, stable, French, patio, back, and bifold doors; plus classic Victorian, Edwardian, and other conservatories. Product technology is rooted in Liniar's multi-chambered uPVC profiles, manufactured at the Denby, Derbyshire facility that houses Europe's largest uPVC extrusion mixing plant. Notable proprietary or co-developed features include the ModLok modular locking system (Yale partnership), the Ingenious Duplex multipoint locking system, the patented Double Action Bubble Seal, and TimberWeld sash joints on the Refine line. Products carry a 10-year guarantee and multiple security certifications, including Secured by Design, SS312 Sold Secure Diamond, British Kitemark TS007:2004, BBA, and FENSA installer approval.

The business model is a two-sided marketplace monetized primarily through lead generation and referral commissions paid by installer network members, supplemented by membership fees from installers who join the network. The service is free for homeowners. Pricing for products is published in indicative ranges (e.g., sliding patio doors £895–£3,550; basic uPVC French doors £900–£1,500; front doors from £250–£1,500+; composite doors from £1,158), with installation provided separately by network installers. Marketing is concentrated in SEO, content (blog posts dated February–May 2026), Google Reviews integration for trust, and the quote builder as the bottom-of-funnel conversion tool. The company is privately held, headquartered at Units 3KLM Hudson Road, Saxby Road Industrial Estate, Melton Mowbray, United Kingdom, with 1–10 employees, and serves only the UK market.

Name

Double Glazing Network

Legal name

TruFrame Ltd

Website

https://doubleglazingnetwork.com

Company type

Private

Founded year

2014

Operating status

Operating

Headcount range

1–10 employees

Ownership category

akta.pro rank

Product category

Home Improvement Installation Services

NAICS

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

SIC

Services-To Dwellings & Other Buildings (7340)

akta.pro primary industry

Survey/Panel-Based Lead Capture & Co-Registration Services (BPAFAKAN)

Keywords

• Double glazing installation
• Window replacement services
• Door installation services
• Conservatory installation
• Home improvement referrers

Headquarters

HQ city

Melton Mowbray

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Marketing or Sales, Operations, Personnel, Technology or R&D

Revenue model

1. Lead Generation / Referral Commission: DGN connects homeowners seeking double glazing installations with vetted local installers in their network. Revenue is generated through leads and referrals to installer members. The service is free for homeowners; DGN earns revenue from the installer network members.
2. Network Membership Fees: Installers pay to become members of the DGN network, gaining access to customer leads and the right to use the Liniar brand through the TruFrame relationship. The contact-us page includes a 'Become a Member' form for installer recruitment.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

Double Glazing Network is an online lead generation and referral platform that connects UK homeowners with vetted, FENSA-approved local installers of Liniar uPVC windows, doors, and conservatories. The service is free for homeowners, who use a postcode-based installer search and an online quote builder to request indicative pricing and be matched with local installer members. Revenue is generated from the installer network through membership fees and lead/referral commissions, with all supplied products backed by a 10-year guarantee.

Product overview

Double Glazing Network operates as an installer network connecting homeowners with vetted local tradespeople for the installation of Liniar uPVC windows, doors, and conservatories across the UK. The product portfolio centers on the Liniar window and door system, encompassing multiple window styles (casement, French casement, flush sash, sliding sash, tilt and turn, and the premium Refine line) and door types (front doors, residential doors, composite doors, stable doors, French doors, patio doors, back doors, and bifold doors), plus classic conservatories with various roof options. Products are characterized by energy efficiency, security features (Yale and Modlock locking systems, Secured by Design accreditation), lead-free and recyclable materials, and a 10-year guarantee. The company positions itself as a free matching service rather than a product manufacturer.

Differentiator

Problem solved

Functional benefit

Brands

• DGN: The trading abbreviation for Double Glazing Network, an impartial website connecting homeowners with trusted local double glazing installers.

Products and services

• uPVC Casement Windows Standard uPVC casement windows with 70mm frame depth, available in sculptured or chamfered profiles with welded joints; offered to UK homeowners via the DGN installer network.
• French Casement Windows French casement windows with a wide clear opening for enhanced ventilation and aesthetic appeal; offered to UK homeowners via the DGN installer network.
• Flush Sash Windows Single rebated flush sash windows with hand-finished details for a traditional appearance; offered to UK homeowners via the DGN installer network.
• Sliding Sash Windows Vertical sliding sash windows with spring-balanced mechanisms for effortless operation and weather protection; offered to UK homeowners via the DGN installer network.
• Tilt and Turn Windows Dual-purpose uPVC windows that open both vertically and horizontally, offering easy-clean functionality and unobtrusive ventilation; offered to UK homeowners via the DGN installer network.
• Refine Windows 80mm flush casement windows with TimberWeld sash joints, available as fully mechanically jointed or welded options; described as the UK's only Secured by Design accredited Flush Sash uPVC window and offered to UK homeowners via the DGN installer network.
• Front Doors Entry doors designed for security and energy efficiency, available in uPVC, composite, and timber options; offered to UK homeowners via the DGN installer network.
• Residential Doors State-of-the-art uPVC residential doors with Ingenious Duplex multipoint locking, double rebated construction, and weather-tight seals; offered to UK homeowners via the DGN installer network.
• Composite Doors Premium composite doors made from PVC, wood, insulating foam, and GRP (glass reinforced plastic) offering superior strength, security, and energy efficiency, with Secured by Design accreditation; offered to UK homeowners via the DGN installer network.
• Stable Doors Split-level doors with independent top and bottom sash operation, providing ventilation while maintaining security, built on the lead-free Liniar profile; offered to UK homeowners via the DGN installer network.
• French Doors Hand-finished uPVC French doors with high-security multipoint locking, optional Dynamic 2D door hinges by SFS Intec, and BBA / BS 7412 / PAS 24 / Secured by Design accreditation; offered to UK homeowners via the DGN installer network.
• Patio Doors uPVC sliding patio doors featuring ultra-slim sightlines, multi-wheeled air-glide running system, and ModLok modular locking system (designed in partnership with Yale); offered to UK homeowners via the DGN installer network.
• Back Doors Energy-efficient double-glazed back doors with multipoint locking systems, robust uPVC construction, and weather-resistant seals; offered to UK homeowners via the DGN installer network.
• Bifold Doors Concertina-folding doors that increase natural light and provide seamless indoor-outdoor living; offered to UK homeowners via the DGN installer network.
• Classic Conservatories Fully bespoke uPVC conservatories available in Victorian, Edwardian, and classic styles, with options for glass, lantern, polycarbonate, and solid roofs; offered to UK homeowners via the DGN installer network.
• Find an Installer (Postcode Search) Self-serve web tool letting UK homeowners search by postcode to find and compare vetted, FENSA-approved local double glazing installers in the DGN network.
• Online Quote Builder (quote-builder.co.uk/DGN) Self-serve online instant quotation tool that lets UK homeowners request indicative pricing for Liniar uPVC windows, doors, and conservatories and be matched with local installers.
• DGN Installer Network Membership Subscription-based membership programme for UK double glazing installers, granting access to DGN-qualified homeowner leads, the right to supply and fit Liniar products, brand association, and TruFrame-provided training and assessment.

Quantifiable outcome

• Energy savings through improved insulation
• +1 more outcomes

Named customers12 records

Segments1 record

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Three partnerships are on record, tiered core.

• TruFrame Trade Frames LtdcoreStrategic or Co-development PartnerTruFrame Trade Frames Ltd is the parent company that created DGN. As the UK's largest fabricator of Liniar windows and doors, TruFrame provides the product supply, training, and assessment for the installer network. DGN runs as a free service to drive demand for TruFrame products.
• LiniarcoreTechnology or IntegrationLiniar is the brand of uPVC windows and doors manufactured by TruFrame. All products on the DGN network are Liniar products. Liniar's Denby facility houses Europe's largest uPVC extrusion mixing plant. Products are lead-free and 100% recyclable.
• FENSAcoreOthersFENSA (Fenestration Self-Assessment Scheme) is the industry regulatory body. All installers in the DGN network are FENSA approved, meeting building regulations for installations.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Bark.com: UK-based professional services marketplace covering home improvement among other verticals. Competes for installer marketing budgets with a broader, non-verticalized matching model.
• Rated People: UK home improvement marketplace that connects homeowners with local tradespeople via posted jobs. Closely mirrors DGN's consumer-to-installer matching motion and trust-signal approach.
• TrustATrader: UK directory of vetted tradespeople with membership and review-based trust signals. Overlaps with DGN's vetted-installer positioning for the home improvement category.
• Checkatrade: UK's largest directory of vetted tradespeople, with a paid-membership model and consumer review verification. Directly comparable to DGN's lead-gen / vetted-installer model in the home improvement vertical.
• Local Heroes (Centrica / British Gas): British Gas / Centrica-owned marketplace connecting UK homeowners with vetted engineers and tradespeople. Directly comparable lead-gen / installer matching business, with the advantage of an established consumer brand.
• MyBuilder: UK trades marketplace letting homeowners post jobs and receive bids from local tradespeople. Competes for the same lead-generation wallet that DGN targets.

Broad incumbents

• Houzz: Global home renovation and design platform with a UK professional directory. Competes indirectly with DGN for homeowner mindshare at the inspiration and project-initiation stage.
• Safestyle UK: UK's largest specialist retailer of replacement windows and doors. Overlaps with DGN's end-product category but competes via a vertically integrated direct-to-consumer model rather than a marketplace.
• Anglian Home Improvements: Large UK home improvements company (windows, doors, conservatories) with national direct sales. Adjacent incumbent that competes with DGN-affiliated installers on the same homeowner jobs.

Emerging players

• TrustMark: UK government-endorsed quality scheme for tradespeople. Relevant to DGN because FENSA-style trust accreditation is core to DGN's value proposition, and TrustMark competes for the same consumer trust signal.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/DGNetworkUK
• Facebookfacebook.com/doubleglazingnetwork

Revenue estimate

Valuation estimate

Number of profiles

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 Double Glazing Network