Vertical sliding sash windows from Osborn Glass


Our vertical sliding windows imitate 16th century sash windows, perfect for older traditional properties or in areas of conservation. Designed to offer modern solutions to without compromising on the traditional look and feel.


Our sash windows are available in UPVc, Timber and Aluminium profiles, each one sourced from the best uk manufacturers and complementing other products that we offer.


Please select a product to view | Upvc sash windows | Timber sash windows | Aluminium sash windows |


Aluminium sliding windows


Our sliding aluminium windows are versatile, durable solution for flats, commercial properties and domestic houses. Unlike Upvc and timber sliders, aluminium sliders can slide both vertically and horizontally. Our dualslide is the new solution to vertical and horizontal sliding windows. Utilising advanced polyamide thermal break technology, Dualslide provides high thermal performance without the need to resort to foam filled profiles or complex and costly sealed unit specifications.


Choice of colours


Our aluminium windows have a powder coated finish as standard. Like our other products these are also available in any RAL colour. Shown below are our standard colours. Matt, satin or gloss finishes can be provided.














Aluminium windows offer maximum security and strength due to the construction and materials that they are manufactured with. Our windows conform to BS 7950/4873, enhanced security performance of casement
and tilt/turn windows for domestic applications.


Glass Options


The current building regulation for replacement windows requires a minimum of a C energy rating. Osborn glass as standard offer the higher A energy rated window as standard. This of course can now be upgraded even further to our brand new triple glazed window.


Our windows are glazed with standard Clear or obscure Pilkington glass, depending on your requirements. There are many different types of decoration that can be applied. By applying lead, Georgian bar or even a stained glass design to the window you can add that personal touch. For the range of glass options please see our glass and glazing page