Traditional Wooden Box Sash Windows with Double Glazing UK

You can trust in us

Many specialists , professionals and tradesman have trust in our products. It is not without good reason that we are one of Englands market leaders in production of box sash , casement windows and doors.

Our Products

We specialise in pre-glazed box sash windows , whether double or single glazed. We also produce casement windows , doors and staircases. All of our products are made to measure.


The original material choice for box sash windows. It has the traditional look and feel that are essential for many projects. Maintained timber has a proven record for durability and can be finished in any colour. Timber offers excellent thermal characteristics and softwood is a renewable resource.

Our Approach to Quality also Applies to the Environment

Everyone who likes wood and appreciates working with this clean , natural material , also appreciates how easily it regenerates in the natural cycle. Most of our timber comes from the Meulanskog Forestry Association , whose entire forestry organisation has been certified to ISO14001 and PEFC (Pan European Forestry Certification).

Why Use Wood rather than UPVC

UPVC windows have become more widespread in recent years as a result of intense aggresive marketing. We can understand the wish to reduce fuel bills but this has been used as an excuse to rip out existing georgian sashes. Replacement UPVC double glazed windows however, not only look out of place in a georgian facade but can be the least cost effective way of insulating an old house. Factory made windows of all kinds ,aluminium, galvanised steel or plastic almost always damage the character of historic buildings. So called Georgian style replacement windows generally have little in common with the Georgian timber sashes they replace.

 The Clock Mill Bromley by Bow Nationwide Wood Windows Project

Double Glazed Traditional Box Sash Windows : The Clock Mill, Bromley by Bow

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