Our Story

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

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 research and development, helping to ensure that our bespoke products – and the people who create and install them – exceed expectations every time.

While more than 30 years have passed since we began supplying 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.

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. 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.

Download our Essential Recommendations Guide

With over 30 years of experience in the design and manufacture of traditional timber windows and doors, Box Sash is a leading name in the industry. Click here to download our free, easy to read guide: “Essential Recommendations For Choosing A Traditional Window Company”.

Full of clear, useful information, our guide will give you advice on buying traditional windows and doors, and help you to avoid the most common pitfalls before, during and after installation.

Download Our Free Guide


Transparent Service

Unlike some of the larger corporate window suppliers, we believe in treating our customers as valued individuals, not numbers on a screen. 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 27 years experience with us, is on hand to guide you through ordering.

Call Jane 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 28 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 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 28 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.