uPVC Sash Replacement Windows

The period sash box look previously only available in wood

Centiam offer several ranges of windows to replace the period sash box look previously only available in wood.

From a simple casement window split to resemble the proportions of a sash window right up to our top of the range elegance fully sliding balanced sash window with a true Georgian look, Centiam have an option for all installation and price options.

Features include:

Period detail

Period details include optional decorative horns on the top sash, brass, black or chrome effect hardware and traditional sightlines with a deep bottom rail.

Glazing Bars

Decorative glazing bars are available either within the glass (glazed in) or, for the full Georgian effect, can be applied to both sides of the double glazed unit (authentic).


Most window styles can be produced or replicated including arched head frames and bay windows.

Tilt Option

By making the most of modern design and materials, the window can be made so that one or both sashes, tilt inwards. Good for ventilation.


All windows are supplied with pre-tensioned balances fully installed to match the weight and size of the sashes enabling them to glide effortlessly.


An option opening restrictor is available to limit the opening aperture of our windows. This is often termed a child restrictor and provides extra safety.