Company lists · Data refreshed September 2026

Top 25 Sash window manufacturers based in the United Kingdom

Name: Sash window manufacturers based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 1,196 companies tracked

RevenueBase identified 1,196 company matches for sash window manufacturers associated with the United Kingdom as of September 2026 and tracks 6,687 professional contacts across them, including 1,759 with verified work emails. London is the largest hub.

This list covers company matches for sash window manufacturers 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 September 30, 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 Sep 30, 2026 How this list was built

1,196Companies

6,687Contacts tracked

1,759Verified emails

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The 25 largest sash window manufacturers based in the United Kingdom

Ranked by team size

Top 25 of 1,196 company matches for sash window manufacturers based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 30, 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 Sep 30, 2026	201-500	248 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 · Sep 30, 2026 · View company records in RevenueBase
2	Nordan UK LTD	Exact match	Livingston, United KingdomHQ recorded Sep 30, 2026	51-200	154 contacts →
	Exact match “NorDan is one of Europe’s leading manufacturers of high performance windows, doors and smart accessories.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
3	CR Smith	Exact match	Dunfermline, United KingdomHQ recorded Sep 30, 2026	201-500	150 contacts →
	Exact match “With the vision of our Chairman, Gerard Eadie CBE, CR Smith has grown over the past 50 years to become Scotland’s leading home improvement company.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
4	Nationwide Windows And Doors	Exact match	Rugby, United KingdomHQ recorded Sep 30, 2026	501-1,000	126 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 · Sep 30, 2026 · View company records in RevenueBase
5	Emplas Window Systems	Exact match	Wellingborough, United KingdomHQ recorded Sep 30, 2026	201-500	117 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 · Sep 30, 2026 · View company records in RevenueBase
6	KAT UK Macclesfield	Exact match	Macclesfield, United KingdomHQ recorded Sep 30, 2026	51-200	82 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 · Sep 30, 2026 · View company records in RevenueBase
7	SIDEY	Exact match	Perth, United KingdomHQ recorded Sep 30, 2026	51-200	76 contacts →
	Exact match “Since our foundation in 1932, Sidey’s programme of sustainable and controlled growth has resulted in the company becoming one of the most successful and sustainable window and…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
8	Unique Window Systems LTD	Exact match	Leicester, United KingdomHQ recorded Sep 30, 2026	201-500	71 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 · Sep 30, 2026 · View company records in RevenueBase
9	Polyframe	Exact match	Lenwade, United KingdomHQ recorded Sep 30, 2026	201-500	66 contacts →
	Exact match “Polyframe are a multi award-winning manufacturer of high quality windows, doors and conservatories.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
10	CWG Choices Limited	Exact match	Corby, United KingdomHQ recorded Sep 30, 2026	201-500	50 contacts →
	Exact match “CWG Choices Ltd is a double glazing supplier of windows, doors, conservatories and garden studios/offices.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
11	Ventrolla	Exact match	Harrogate, United KingdomHQ recorded Sep 30, 2026	51-200	50 contacts →
	Exact match “Perfection isn’t just a goal but a standard you can confidently expect.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
12	Granada Glazing	Exact match	Sheffield, United KingdomHQ recorded Sep 30, 2026	51-200	45 contacts →
	Exact match “Granada Glazing is the UK’s leading manufacturer of premium bespoke secondary glazing systems, trusted for over 45 years by architects, developers, contractors and property…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
13	Munster Joinery U.K	Exact match	Warwick, United KingdomHQ recorded Sep 30, 2026	1,001-5,000	45 contacts →
	Exact match “For 50 years in business, Munster Joinery is now among Europe's largest manufacturers of energy-efficient windows and doors.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
14	The Sash Window Workshop Trading LTD	Exact match	Bracknell, United KingdomHQ recorded Sep 30, 2026	51-200	43 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 · Sep 30, 2026 · View company records in RevenueBase
15	Crystal Windows And Doors LTD	Exact match	Romford, United KingdomHQ recorded Sep 30, 2026	201-500	43 contacts →
	Exact match “Crystal® was started in 1995 to offer a fair and honest service to customers wanting replacement windows and doors.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
16	Sovereign Group LTD	Exact match	Nelson, United KingdomHQ recorded Sep 30, 2026	201-500	42 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 · Sep 30, 2026 · View company records in RevenueBase
17	Hazlemere Group	Exact match	High Wycombe, United KingdomHQ recorded Sep 30, 2026	51-200	39 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 · Sep 30, 2026 · View company records in RevenueBase
18	Russell Timber Technology	Exact match	Glasgow, United KingdomHQ recorded Sep 30, 2026	51-200	39 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 · Sep 30, 2026 · View company records in RevenueBase
19	GJB Window Systems	Exact match	Rayleigh, United KingdomHQ recorded Sep 30, 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 · Sep 30, 2026 · View company records in RevenueBase
20	Joedan Windows & Doors	Exact match	Tewkesbury, United KingdomHQ recorded Sep 30, 2026	201-500	35 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 · Sep 30, 2026 · View company records in RevenueBase
21	Mumford & Wood LTD	Exact match	Tiptree, United KingdomHQ recorded Sep 30, 2026	51-200	32 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 · Sep 30, 2026 · View company records in RevenueBase
22	George Barnsdale	Exact match	Spalding, United KingdomHQ recorded Sep 30, 2026	51-200	32 contacts →
	Exact match “At George Barnsdale, we have been making premium quality timber windows & doors in our Lincolnshire based factory since 1884.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
23	West Port Timber Windows, Doors & Fire Doorsets	Exact match	Maryport, United KingdomHQ recorded Sep 30, 2026	51-200	32 contacts →
	Exact match “West Port are a bespoke timber window, door and fire doorset manufacturing company based in Maryport who have been supplying prestige products to the UK since 1997.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
24	Scotia Windows And Doors	Exact match	Kilmarnock, United KingdomHQ recorded Sep 30, 2026	201-500	28 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 · Sep 30, 2026 · View company records in RevenueBase
25	Everglade Windows LTD	Exact match	Greenford, United KingdomHQ recorded Sep 30, 2026	51-200	27 contacts →
	Exact match “At Everglade Windows, we are devoted to progressive thinking and pushing boundaries.” Recorded in the RevenueBase company graph · Sep 30, 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 “sash window manufacturers”. 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 1,196 sash window manufacturers based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 1,759 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Sash window manufacturers based in the United Kingdom at a glance

As of Sep 30, 2026

26.3%Verified-email coverage

5.6Average contacts per company

1-10Median size (employees)

6.3%Largest-city concentration · London

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

662

11-50

360

51-200

106

201-500

501-1,000

1,001-5,000

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 1,196 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 “sash window manufacturers” 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 1,759 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 September 30, 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.

Sash window manufacturers by metro

Sash window manufacturers in London75

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 “sash window manufacturers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many sash window manufacturers are there based in the United Kingdom?

RevenueBase identified 1,196 company matches for sash window manufacturers associated with the United Kingdom as of September 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 sash window manufacturers?

London leads with 75 company records, followed by Norwich (17) and Nottingham (13).

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 1,759 professional contacts with verified work emails tracked across these 1,196 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 September 30, 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.