Masterframe Windows Ltd

Company Profile:

Masterframe Windows Ltd

Company Overview:

Celebrating 25yrs, we're specialist trade manufacturers of PVCu sash windows & trusted suppliers to numerous installation companies across the UK.
1st company to gain a WER,
1st to be EST recommended
1st to be recognised by Secured by Design and "whole window" tested by the BBA. Exceptional quality,nationwide service,"A rated" is standard.

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Contact Details:

4 Crittall Road, Witham, Essex, CM8 3DR

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We initially bought cheaper windows from another major manufacturer for our self-build house. The...  5.0 (30/08/2016)


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As a trade, supply only, manufacturer of Sash Windows, we value and appreciate all orders. We understand and respect your expectations because you entrust us with the manufacture and delivery of products for your customer. We genuinely appreciate that trusted position, thank you.

We aim to provide you with an exemplary service, with products we’re proud of, which you’ll find easy to install and your customer delighted to receive. Should any of these ambitions not be met please let us know, so that we have an opportunity to correct matters.

You probably know of masterframe and our reputation for making upmarket, well-engineered, sturdy, reliable sash windows. True this comes at a cost which is higher than alternative producers who engineer their products to the basic minimum.

We’re very proud of the products we make, the service we offer every client and our workforce that makes the operation happen. More importantly, you won’t find us cutting corners; you won’t be disappointed with sub-standard windows. We don’t install windows ourselves, we rely upon you selling sash windows, that’s why we’ll help you all we can to maximise your chances of getting orders, improving your sales process and conversion rates.

You may not have been told about how we can help, so here’s a quick reminder:-

•             Unbranded brochures
•             Specification sheets for each range
•             Twin packs (duplicate quotes for you to leave with your Customer)
•             Sample loan scheme
•             Technical, Product and Sales training for your Sales People
•             Along with excellent products, BBA certified, SBD options, and Window Energy Rated ‘A’ as standard

Unlike the majority of Fabricators who make everything, (doors, patios, conservatories) Masterframe is unique, we specialise in Sash Windows, we don’t make any other style of Window, just sash. Over the years, we’ve redesigned, tweaked, changed or modified EVERY component on our windows because standard components just aren’t up to it.

It’s meant that we were the first company to gain an Energy Rating for their windows, the first to get an A rated sash window, indeed the first 5 WER’s (window energy ratings) are ours. We helped BSI write the technical standards so that Sash Windows could be recognised by the Police as “SBD” (Secured by Design) and the first to have BBA certification for the “whole of Life” 20,000 cycles or 20 years, including plant on Georgian bars!

Formed in 1988, we’ve been making (and focused on) Sash Windows for just under 24 years.

If you’re looking for a trade supplier you can trust to delivery you sash windows, to price, specification and on time, then call us on 01376 511211 or check out the web site

If you’re looking for a trusted local installer of our premiere Bygone Collection of sash windows, then visit or call 0800 0484 672

Remember we don’t fit anything ourselves, we do make just Sash Windows and will gladly make them for you, but we do restrict the sale of Bygone to the approved network of Installers so that we can guarantee consistent installation standards. If you feel you have what it takes to become an approved installer for your area, then let us know.

Look out for us at next year’s FIT Show, the Fabricator Installer and Trade Show next April.  Watch the website for details and remember to ask for your free tickets nearer the time.