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window manufacturer window installation essex london south east

We Are Specialists in Double-Glazed Doors & Windows in Essex & London

Look Into A Brighter Future

Over 30 years experience

Exterior Plas specialises in manufacturing and installing affordable, high quality, energy efficient, secure windows and doors for Commercial, Educational and Residential properties across London and the South East. Established for over 30 years, Exterior Plas is a family run company with upwards of 70 employees. Historically our expertise has been with local councils, housing associations and the educational sector, however we also carry out domestic works and deal with the trade market.

We have many years of experience working closely with our clients and providers to deliver an excellent service using the best quality materials to create tailored products designed and fitted specifically to your needs.

Windows & Glazing

Windows and glazing are at the very heart of our business. We are proud to not only be at the forefront of window systems but to also be able to offer a wide range of specialist glazing options. Over the years we have facilitated many major London landmarks with some very tricky glazing requests such at the glass dome at Australia House and the glass roof panels at Covent Garden Market. We take pride in being able to complete the most challenging of jobs with the highest standards.

Exterior Plas have our own extensive on-site manufacturing facility with state-of-the-art machinery which enables us to stock and cut all of our ancillary items in-house, making our turnaround quick for our clients.

Bi-Fold Door Experts

Bi-fold doors are the perfect way to bring the outside in. Whether you have a new build, are replacing or remodelling we are on hand to offer guidance to make the best of your home. We supply a wide range of bi-fold options including aluminium, uPVC and timber in a wide range of colours and finishes. Head over to our residential gallery to see some of our competed bi-fold projects.

Double Glazing Company Near You

It is mandatory for all residential and commercial properties to have double glazed windows, as per the UK Building Regulations 2002. They are essential for maintaining compliance with energy performance rating standards—a minimum of E. Windows and doors are a significant investment for new builds and renovations, and a worthwhile approach is highly sought after. So if you have been Google searching for the best “local double glazing companies near me in Essex,” you need to look beyond the conventional options.

Welcome to Exterior Plas. We are one of the leading local double glazing companies in Essex. We are one of the largest manufacturers of double glazed doors and windows in Essex using the ‘Calibre’ profile. We offer a one-stop solution for design, manufacturing, supply, installation and maintenance. You can also find us among the most reputed double glazing companies in London, with our health-safety trained commercial glazing experts working with some of the most prestigious clients and projects across Essex and London for both heritage and new builds. Explore the world of better looking windows and doors.

Other Services We Provide


Here at Exterior Plas, we are proud to provide the service of planning, creating and supplying our clients with bespoke specialist glazing for a range of projects from period properties to glass domes and architectural installations.


We at Exterior Plas offer an established repairs and maintenance service in and around the South East of England. Our dedicated repairs team at our Head Office are on hand to assist the client throughout the day with any updates or queries…


Established in 2007, our reactive maintenance department is committed, experienced and knowledgeable, which facilitates a quick and efficient repair on any window, door or glazing issue you may have as a business or privately.

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