The required tests to meet the standard were carried out on The Sash Window Workshop's vertical sliding sash windows on the 20th March 2017.

The BS 6375-1:2009 standard specifies the exposure categories related to test pressure levels for external windows and doorsets. The tests incorporate air permeability, BS EN 1026:200, watertightness, BS EN 1027:2000, and resistance to wind load, BS EN 12211:2000.

The Sash Window Workshop manufactures and installs high quality, bespoke timber windows and doors. All their replacement windows and doors come with a 20 year guarantee, in addition to the 50 year anti-rot guarantee if they are made from Accoya, their preferred timber.

The company pride themselves on manufacturing timber windows and doors to suit your project, while also meeting modern requirements, such as double glazing.