Years of customer collaboration and advances in technology have helped us develop our bespoke 50-Year casement window into one of the highest performing on the market. While we wanted to make our windows thermally efficient, we also wanted to stay true to the heritage of the casement window. That’s why we designed our range with meticulous precision to retain the flush-line traditional appearance that helps add character to your property.
London Box Sash Windows provides a range of bespoke casement window options to suit your specific requirements. From traditional flush casement windows all the way through to bespoke modern designs.
Like all our premium specification products, the ‘50-Year Casement Window’ is made using the highest grade Accoya® wood on the market. Accoya® wood is the result of decades of research and development that has brought together a long-established, extensively proven wood modification technique and leading-edge patented technology – acetylation – to create a high performance wood, ideal for outdoor use and challenging applications.
Accoya® has properties that match or exceed those of the best tropical hardwoods and treated woods, yet is manufactured using wood from sustainable sources.
One of the most important reasons customers seek new windows is to improve sound insulation as well as thermal efficiency. At London Box Sash Windows we know that the glass used in our windows plays one of the most important roles of all. That’s why we glaze our premium casement windows with the highest ‘A’ rated double-glazed units, which exceed latest building regulation requirements.
The windows are glazed with 24mm double-glazed units, comprising of low ‘E’ glass, argon filled ‘Swisspacer’ bar and Pilkington Optiwhite extra clear, low iron glass, which provides an indicative center pane U-Value of 1.2 W/m2K.
To protect and prolong the life of our double-glazed units we have designed a unique drained and vented rebate glazing system to prevent premature failure of glazing unit seals by allowing any trapped moisture to drain through small, concealed drainage holes. Such a development has enabled us to double our guarantee against premature failure.
Our casement window range can also incorporate a variety of other glass options to suit specific requirements:
The 50 casement window is finished with the finest Teknos low-maintenance microporous paint systems, coupled with end grain sealing and highly skilled spray application, giving us an unrivalled, long-lasting paint finish. Because our sash window range is made using Accoya® exclusively, maintenance cycles are greatly extended and on redecoration only require one topcoat.
As with our box sash range, we can match to any Dulux, Crown, Farrow & Ball or RAL colour you require.
The ’50 Year Casement Windows’ come fully draught-sealed. All casement window and door sets are draught-proofed utilising Schlegal seals concealed within the stops to opening lights, ensuring optimum thermal performance.