Company lists · Data refreshed October 2026

Top 25 Casement window frames suppliers based in the United Kingdom

Name: Casement window frames suppliers based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 23, 2026 959 companies tracked

RevenueBase identified 959 company matches for casement window frames suppliers associated with the United Kingdom as of October 2026 and tracks 5,729 professional contacts across them, including 1,626 with verified work emails. London is the largest hub.

This list covers company matches for casement window frames suppliers associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 23, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 23, 2026 How this list was built

959Companies

5,729Contacts tracked

1,626Verified emails

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The 25 largest casement window frames suppliers based in the United Kingdom

Ranked by team size

Top 25 of 959 company matches for casement window frames suppliers based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 23, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	First Home Improvements	Exact match	Norwich, United KingdomHQ recorded Oct 23, 2026	201-500	230 contacts →
	Exact match “First Home Improvements traces its roots to the 1970's and prides itself on installing highly innovative A rated energy saving products unrivaled by many others within our…” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
2	Nationwide Windows And Doors	Exact match	Rugby, United KingdomHQ recorded Oct 23, 2026	501-1,000	135 contacts →
	Exact match “Manufacturers and Installers of PVCu Windows and Doors,Composite and Fire Doors and Conservatories to the Retail, Trade and Commercial Sector.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
3	Emplas Window Systems	Exact match	Wellingborough, United KingdomHQ recorded Oct 23, 2026	201-500	114 contacts →
	Exact match “Emplas is the window and door fabricator of choice, offering a complete range of premium-quality, high-security, energy-efficient windows and doors for the trade installer, new…” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
4	KAT UK Macclesfield	Exact match	Macclesfield, United KingdomHQ recorded Oct 23, 2026	51-200	83 contacts →
	Exact match “KAT UK is a Macclesfield based manufacturer of specialist glazing products, including Aluminium and PVCu bifold doors, sliding patio doors, entrance doors, French doors, windows…” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
5	Unique Window Systems LTD	Exact match	Leicester, United KingdomHQ recorded Oct 23, 2026	201-500	72 contacts →
	Exact match “An award-winning designer, fabricator and installer of UPVC and aluminium windows, doors and curtain walling, Unique Window Systems Ltd specialises in the supply of quality…” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
6	Polyframe	Exact match	Lenwade, United KingdomHQ recorded Oct 23, 2026	201-500	72 contacts →
	Exact match “Polyframe are a multi award-winning manufacturer of high quality windows, doors and conservatories.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
7	Express Bi-Folding Doors	Exact match	Leeds, United KingdomHQ recorded Oct 23, 2026	201-500	62 contacts →
	Exact match “Express Bi Folding Doors are the UK's leading manufacturer & installer of bespoke aluminium products.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
8	JPJ Installations LTD	Exact match	Braintree, United KingdomHQ recorded Oct 23, 2026	51-200	59 contacts →
	Exact match “JPJ Installations Ltd are specialists in Aluminium Glazing Systems including Curtain Wall, Framing, Door and Window Systems.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
9	Glazerite UK Group LTD	Exact match	Wellingborough, United KingdomHQ recorded Oct 23, 2026	201-500	59 contacts →
	Exact match “Glazerite UK Group is a leading trade fabricator offering installers access to one of the most comprehensive product ranges in the industry.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
10	Fleetwood Architectural Aluminium LTD	Exact match	Slough, United KingdomHQ recorded Oct 23, 2026	51-200	57 contacts →
	Exact match “Fleetwood Architectural Aluminium (FAA) is one of the UK’s leading designers, manufacturers and installers of aluminium curtain walling, facades, windows and doors.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
11	Sovereign Group LTD	Exact match	Nelson, United KingdomHQ recorded Oct 23, 2026	201-500	48 contacts →
	Exact match “Sovereign Group are manufactures and installers of UPVC windows and doors, aluminium windows, doors and composite doors.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
12	The Sash Window Workshop Trading LTD	Exact match	Bracknell, United KingdomHQ recorded Oct 23, 2026	51-200	44 contacts →
	Exact match “At The Sash Window Workshop, we specialise in the design and manufacture of bespoke timber windows and doors for fine homes across Great Britain.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
13	Dekko Window Systems LTD	Exact match	Ashton-under-lyne, United KingdomHQ recorded Oct 23, 2026	51-200	44 contacts →
	Exact match “DEKKO WINDOW SYSTEMS LIMITED Manufacturers of a wide range of glazing products for professional installation companies.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
14	RED Systems Limited	Exact match	London, United KingdomHQ recorded Oct 23, 2026	11-50	43 contacts →
	Exact match “RED Systems helps main contractors and developers plan and deliver £1m to £10m packages across higher-risk residential, mixed-use and regeneration projects.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
15	Russell Timber Technology	Exact match	Glasgow, United KingdomHQ recorded Oct 23, 2026	51-200	43 contacts →
	Exact match “For over 55 years, Russell Timber Technology has been the UK’s leading manufacturer of energy efficient, sustainable, precision-engineered Timber and Alu-Clad windows, doors and…” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
16	Arkay Windows	Exact match	Watford, United KingdomHQ recorded Oct 23, 2026	51-200	41 contacts →
	Exact match “Arkay Windows provides a one stop shop high-end glazing solution for commercial & domestic projects.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
17	Joedan Windows & Doors	Exact match	Tewkesbury, United KingdomHQ recorded Oct 23, 2026	201-500	38 contacts →
	Exact match “At Joedan, we are a family run business with Retail Design Centres across the Midlands and Southern England; to include a Manufacturing Facility and a Commercial Division.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
18	Hazlemere Group	Exact match	High Wycombe, United KingdomHQ recorded Oct 23, 2026	51-200	37 contacts →
	Exact match “Hazlemere is a family owned and run double glazing manufacturer and installer based in High Wycombe, Buckinghamshire.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
19	Mumford & Wood LTD	Exact match	Tiptree, United KingdomHQ recorded Oct 23, 2026	51-200	36 contacts →
	Exact match “Timber Windows and Doors Established in 1954 Mumford & Wood has since become the UK’s premier manufacturer of high quality timber windows and doors.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
20	GJB Window Systems	Exact match	Rayleigh, United KingdomHQ recorded Oct 23, 2026	51-200	36 contacts →
	Exact match “GJB Window Systems are a Manufacturer of PVCu, Aluminium & Timber Alternative Flush Sash Windows, Doors and Conservatories for the Trade Installer.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
21	Scotia Windows And Doors	Exact match	Kilmarnock, United KingdomHQ recorded Oct 23, 2026	201-500	33 contacts →
	Exact match “Scotia Windows And Doors was established in 1983 as a manufacturer of high quality PVC-u windows and doors and from our factory base in Ayrshire we now provide coverage throughout…” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
22	Chigwell Window Centre PLC	Exact match	Forest Rd, United KingdomHQ recorded Oct 23, 2026	51-200	32 contacts →
	Exact match “Established in 1996, Chigwell Window Centre PLC (part of Chigwell Group PLC) manufactures, supplies and installs aluminium and uPVC doors and windows for domestic, commercial and…” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
23	Polar NE	Exact match	Middlesbrough, United KingdomHQ recorded Oct 23, 2026	51-200	31 contacts →
	Exact match “Polar are one of the UK's leading providers of windows, doors, curtain walling, healthcare windows, healthcare doors, brise soleil, louvres and bespoke solutions.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
24	Cotswold Architectural Products	Exact match	Cheltenham, United KingdomHQ recorded Oct 23, 2026	501-1,000	31 contacts →
	Exact match “Cotswold Architectural Products has been synonymous with excellence in the fenestration industry since 1976, when we became the first company in the UK to manufacture friction…” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
25	Gowercroft Joinery	Exact match	Alfreton, United KingdomHQ recorded Oct 23, 2026	51-200	31 contacts →
	Exact match “Gowercroft Joinery are an industry leading, innovative UK manufacturer of award winning wooden windows and doors.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “casement window frames suppliers”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 959 casement window frames suppliers based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 1,626 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Casement window frames suppliers based in the United Kingdom at a glance

As of Oct 23, 2026

28.4%Verified-email coverage

6.0Average contacts per company

1-10Median size (employees)

7.5%Largest-city concentration · London

Oct 23, 2026Page data refreshed

Companies by employee count

1-10

475

11-50

323

51-200

107

201-500

501-1,000

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 959 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United Kingdom whose business descriptions match “casement window frames suppliers” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every displayed company carries at least one verified work email. RevenueBase tracks 1,626 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on October 23, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Casement window frames suppliers by metro

Casement window frames suppliers in London72

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “casement window frames suppliers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many casement window frames suppliers are there based in the United Kingdom?

RevenueBase identified 959 company matches for casement window frames suppliers associated with the United Kingdom as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

First Home Improvements tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most casement window frames suppliers?

London leads with 72 company records, followed by Leeds (13) and Birmingham (12).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 1,626 professional contacts with verified work emails tracked across these 959 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 23, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.