Our Story

The Original Box Sash Windows Company was founded in 1979. As a proud local family business, built on trust and decency, we quickly made a name for ourselves by offering high quality products and exceptional, personal service to every one of our customers.

We love taking you back to a bygone era where innovation and tradition held sway and the smell and feel of wood always meant quality craftsmanship.
Our mission is to honour that tradition whilst embracing innovation; to bring glorious good times back to your home and to help you and your family frame your day in the perfect way.
By 1987, we were able to establish our own production facility in Merthyr Tydfil to help us meet demand for our beautifully crafted timber windows and doors. Since that time, we have invested in continuous innovative research and development, helping to ensure that our bespoke products – and the people who create and install them – exceed expectations every time.

While nearly 40 years have passed since we began supplying our own traditional timber windows and doors, our commitment to quality and service remains unchanged. From the moment, you meet with our certified surveyor to the completion of your installation, we will do our utmost to ensure the results are to your complete satisfaction.

Beyond Installation
Our dedicated aftercare service – which includes a lifetime parts guarantee – is our way of demonstrating that, while your project may be finished, our responsibility to you as our customer is not. They are always Box Sash windows and represent us long after the installation project has ended. We grow by referral so you can imagine how much we value good customer service and aftercare. So, we offer a five year no quibble adjustment service on all products, and are always on hand to advise you in the event of any questions.

Avoid the common pitfalls: 40 years of experience in one handy guide – DOWNLOAD NOW FOR FREE!

With nearly 40 years of experience (way more if you add up all our personal experience) in the design and manufacture of traditional timber windows and doors, The Original Box Sash Windows Company is a leading name in the industry.

We’ve combined our knowledge into one handy, free, easy to read guide: “How to choose a Traditional Window company” – we hope you will download it.

Avoid the most common pitfalls.
Click here to download it now.


Transparent Service

Our family-run business enables us to treat our customers as valued individuals, not numbers on a screen to a big impersonal corporation. As such, we remain 100% committed to offering you a service that is entirely transparent and designed to offer you complete peace of mind at every stage.

Why You are in Safe Hands

At Box Sash, we understand that traditional timber windows and doors are a significant investment. Choose to work with us and you’ll have a personal point of contact throughout the work, and for any queries after completion. Below are just a few of our key team members.

janeJane Foley, Customer Liason Manager

Our business is built on the quality of our products and the personal service we offer all our customers. Our customer liaison manager, Jane, who has 30 years experience with us, is on hand to guide you through ordering.

Call Jane direct on 01753 829104

john-roseJohn Rose, Operations Team Manager

Our customers value the knowledgeable, no pressure approach of traditional window experts like John, whose advice on our beautiful, cost effective and energy efficient windows is tailored to your individual requirements and delivered to you in a free, written report.

tanyaTanya Sim, Installation Team Manager

Home renovation work can be complicated, but our installation manager Tanya, who has 31 years experience with us, is on hand to streamline the process. From fitting to completion, we strive to keep disruption to a minimum.

Call Tanya direct on 01753 829110

philPhillip Bunce, Production Team Manager

Our bespoke timber windows are the combined result of our innovative processes, quality craftsmanship, and superior materials. Production manager, Philip, who has 31 years experience with us, oversees skilled joiners, glazers and painters to ensure your complete delight with our products.

Corporate Social Responsibility

Box Sash is an environmentally responsible manufacturer. As such, we make sure that the sourcing, crafting and installation of our products is as low impact as possible.

In addition to our environmental commitments, we manufacture our windows in a British Government designated low employment region, helping to stimulate the local economy and generate work for the people who live there and assist in training youngsters.