CRK Windows

What CRK Windows does

CRK Windows Limited is a family-run manufacturer and installer of windows, doors, conservatories, and roofline products, founded in 1977 and headquartered at a combined showroom and factory site at 38 Mark Road, Hemel Hempstead, Hertfordshire, UK. The company fabricates PVCu and aluminium products in-house — including flush sash, casement, tilt-and-turn, traditional sash, shaped, and secondary double-glazing windows; composite, bi-folding, French, patio, back, and internal doors; and Edwardian, Victorian, garden-room, and solid-roof conservatories — alongside add-ons such as canopies, rooflines, cladding, and Pilkington Activ self-cleaning glass. It operates with 11–50 employees and is privately held by the founding family with no external investors, parent, or subsidiaries.

CRK's go-to-market is a fully direct-to-consumer, vertically integrated model: customers engage through a physical showroom, a website with an online Pricepoint design tool, telephone sales, and a Matterport virtual showroom tour, then receive in-house survey, manufacture, installation, and aftercare — all delivered within roughly a 25-mile radius of Hemel Hempstead covering Hertfordshire, Watford, St Albans, Berkhamsted, Tring, Harpenden, and extending into Buckinghamshire, Milton Keynes, Middlesex, and parts of London. Sales are quote-based and never publicly listed; pricing is generated per project and bundled with installation as a one-time product-plus-service transaction, with smaller after-sales revenue from repair and maintenance, and a supply-only option for self-installers. The company sells primarily to residential homeowners, with a specialist sub-segment serving heritage, listed-building, and conservation-area customers via FlushSash and secondary double-glazing systems.

Commercially, CRK leans heavily on credentials and trust signals rather than price competition: Independent Network (VEKA) membership provides a 10-year insurance-backed guarantee and benchmarking (members at ~98.6% customer satisfaction vs. an industry average of ~83%); ASSURE and FENSA registrations support self-certification against UK building regulations; BS Kitemark, BBA, PAS24, and ISO 14001 accreditations underpin product quality; and a 9.82/10 Checkatrade score across 1,132 reviews reflects strong local brand reputation. No revenue, funding, headcount growth, or M&A signals are disclosed in the available data.

Name

CRK Windows

Legal name

CRK Windows Limited

Website

https://crkwindows.com

Company type

Private

Founded year

1977

Operating status

Operating

Headcount range

11–50 employees

Short description

CRK Windows Limited is a family-run UK fabricator and installer (founded 1977, Hemel Hempstead) that designs, manufactures, and installs PVCu and aluminium windows, doors, conservatories, and rooflines directly for residential homeowners across Hertfordshire and surrounding counties.

Ownership category

akta.pro rank

Product category

Window and Door Manufacturing

NAICS

Metal Window and Door Manufacturing (332321), Residential Remodelers (236118)

SIC

Metal Doors, Sash, Frames, Moldings & Trim (3442)

akta.pro primary industry

Windows (IMADAIAC)

akta.pro secondary industry

Custom Window & Door Fabrication & Replacement (HSAPAJAI)

Keywords

• PVCu window manufacturing
• Door installation services
• Conservatory design
• Aluminium glazing systems
• Secondary double glazing

Headquarters

HQ city

Hemel Hempstead

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Windows, Doors & Conservatories Sales: CRK generates revenue through designing, manufacturing, and installing bespoke windows, doors, conservatories, bi-folding doors, and related home improvement products. Revenue is earned through one-time product sales combined with professional installation services, offering a complete start-to-finish service under one roof.
2. Repair & Maintenance Services: CRK offers a full maintenance and repair service including sealed units, locks, handles, hinges, and other window/door hardware components.
3. Supply Only Service: CRK can provide a supply-only service for customers who prefer their own installers, offering their manufactured products without installation.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels6 records

Core offering

CRK Windows designs, manufactures, and installs bespoke windows, doors, conservatories, bi-folding doors, and related home improvement products primarily in PVCu and aluminium materials. Operating from their Hemel Hempstead factory and showroom, they offer a complete start-to-finish service including consultation, survey, in-house manufacture, professional installation, and aftercare for residential homeowners across Hertfordshire and surrounding areas.

Product overview

CRK Windows is a family-run window, door, and conservatory manufacturing and installation company established in 1977, based in Hemel Hempstead, Hertfordshire. They offer a comprehensive range of home improvement products under one roof, manufacturing most products in-house. Their core product portfolio includes multiple window types (PVCu Energy Plus, CRK Vogue Flush, Traditional Sash, Tilt & Turn, Shaped, Aluminium Frames, Secondary Double Glazing), door varieties (Solid Strength Composite Front Doors, French Doors, Bi-Folding Doors, Patio Doors, Back Doors, Internal Doors), conservatory styles (CRK Solid Roof, Edwardian, Victorian, Garden Room, Combinations), and additional products such as canopies, porches, rooflines, cladding, blinds, and self-cleaning glass. All products are available in extensive colour and finish options. The company also provides a free online design tool for customers to visualize products before purchase.

Differentiator

Problem solved

Functional benefit

Brands

• CRK Vogue Flush: A PVC-U flush sash window designed to match traditional timber windows of the 19th Century, available in various colours and woodgrain finishes.
• Solid Strength Composite Doors

Products and services

• Windows Comprehensive range of PVCu and aluminium windows including casement, flush sash, traditional sash, tilt and turn, shaped, bay/bow, and aluminium frame configurations. Available in over 20 colour options and woodgrain finishes. Manufactured in-house in Hemel Hempstead for residential homeowners seeking energy-efficient, secure, and stylish window solutions.
• CRK Vogue Flush Windows A PVC-U flush sash window designed to match traditional timber windows of the 19th Century. Features five-chamber internal construction, heritage hardware options including monkey tail handles and peg stays, available in 19 colours including woodgrain finishes. Holds BS Kitemark and BBA accreditation, achieving BS7950 and PAS 023/024 security standards.
• Doors Comprehensive range of internal and external doors including front doors, French doors, bi-folding doors, patio doors, back doors, and internal doors. Available in PVCu, aluminium, and composite materials. Manufactured in-house or sourced through trusted partners for residential properties.
• Solid Strength Composite Front Doors Glass Reinforced Plastic (GRP) composite front doors with timber-free construction using PVCu sections with steel reinforcement substrates and CFC-free polyurethane foam core. Reduces energy loss by up to 85% compared to traditional timber doors. Available in nine RAL colour finishes with low threshold meeting Part 'M' Building Regulations. Manufactured under ISO 14001 Environmental Management System licence.
• Bi-Folding Doors Aluminium bi-folding doors allowing over 90% clear opening. CRK manufactures their own range of Aluminium Bi-Folding Doors (Vision Range) and also installs Sunflex Bi-Folding Doors. Create functional and open space for living, working and entertaining.
• Patio Doors Internally glazed PVCu or slender aluminium patio doors with 28mm sealed units, Pilkington K glass as standard, toughened safety glass, argon gas filled sealed units, and 6-point high security hook locking. Fully welded construction for residential properties.
• Conservatories Bespoke conservatories in various styles including Edwardian, Victorian, Garden Room, and Combination configurations. Available in any design, shape and size. Constructed using structural aluminium capped with PVCu for thermal insulation. Designed to extend residential living space.
• CRK Solid Roof Solid roof conservatories that overcome challenges of traditional conservatories. Boost energy efficiency, keep glare out, and create valuable comfortable living space usable all year round. Can also be installed on existing conservatories as a retrofit upgrade.
• Secondary Double Glazing Secondary double glazing using sturdy extruded aluminium alloy sections and 4mm thick glass with woven weather piles. Ideal for listed buildings or properties with restrictions on exterior changes. Multiple operating options including hinged, horizontal sliding, and vertical sliding units. Reduces noise, draughts and heat loss.
• Aluminium Frame Windows Slim-line aluminium window frames with larger glass area than traditional frames, allowing more natural light in and less heat out. Thermally broken for improved thermal performance. Customizable with various colours including white, black, charcoal.
• Traditional Sash Windows Vertical sliding sash windows with timeless elegance and authentic period aesthetics. Individually manufactured with outstanding energy saving, exceptional weather proofing combined with low maintenance and security features.
• Tilt & Turn Windows Contemporary uPVC windows with simple tilt and turn opening system. Easy to operate, easy to clean from inside without ladders. Tilt inwards from top for ventilation or open from side for full access.
• Rooflines & Cladding PVCu rooflines and cladding creating stylish living spaces flooded with natural light. Manufactured and installed for residential properties.
• Porches Stylish entrance porches offering practicality and elegance. CRK handles planning office requirements as part of their service for residential homeowners.
• Repair & Maintenance Service Full maintenance and repair service including replacement of sealed units, locks, handles, hinges, and other window/door hardware components. Available for residential customers.
• Supply Only Service CRK can provide a supply-only service for customers who prefer their own installers, offering their manufactured products without installation.

Quantifiable outcome

• Reduce energy loss by up to 85% compared to traditional timber doors with composite doors
• +5 more outcomes

Named customers2 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• Independent Network (powered by VEKA)coreChannel Partner/ Reseller/ DistributorCRK Windows is a member of the Independent Network, a nationwide organization representing the best PVCu window and door companies in the industry. The network provides 10-year insurance-backed guarantees for homeowners and maintains high standards of professionalism, value for money, and customer satisfaction. Network members achieve 98.6% average customer satisfaction compared to the industry average of 83%.

Scale indicators7 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Clearview Home Improvements: UK manufacturer and installer of windows, doors, conservatories, and orangeries with a regional operating model; comparable product mix, manufacturing-installation integration, and homeowner target segment.
• Zenith Staybrite Windows: Regional PVCu window, door, and conservatory manufacturer/installer operating across the South East; comparable business model, product set, and target customer as CRK.
• Safestyle UK: UK's largest retailer and installer of PVCu windows and doors, serving homeowners across the country with a similar end-to-end sales-and-install model; competes with CRK directly in Hertfordshire and adjacent counties.
• Everest Home Improvements: Long-established UK home improvements company (windows, doors, conservatories) with national reach and similar one-stop design-to-installation value proposition; competes for the same homeowner segment in CRK's Hertfordshire footprint.
• Climatec Windows & Conservatories: Buckinghamshire-based fabricator and installer of windows, doors, conservatories, and orangeries; comparable regional manufacturer-installer with overlapping South East territory and similar bespoke offering.
• Anglian Home Improvements: National UK manufacturer and installer of windows, doors, conservatories, and home improvements; directly comparable product range and direct-to-consumer showroom-driven GTM that overlaps with CRK's territory.

Others

• Eurocell Profiles: UK manufacturer of PVC-U window, door, and roofline systems with national branch network; comparable upstream/complementary role as a profile supplier and installer-network operator in the same product category as CRK.
• VEKA plc: Major UK and global PVCu profile supplier that powers the Independent Network of which CRK is a member; comparable category (window systems) but operates upstream as supplier rather than installer.

Emerging players

• Harvey Maria: UK premium home improvement brand focused on design-led interior and exterior products; partial overlap with CRK's homeowner-facing, showroom-driven, design-consultation model though narrower product line.

Broad incumbents

• Wickes (Travis Perkins): UK home improvement retailer with broad DIY and installed-product ranges including windows and doors; competes indirectly with CRK as a national distribution channel for glazing products to homeowners.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/crkwindows
• Facebookfacebook.com/CRKWindowsLtd
• LinkedInlinkedin.com/in/crk-windows-547767171
• Instagraminstagram.com/crk_windows77/?hl=en

Compliance5 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 CRK Windows