Sliding Sash Weight Balance windows are the most recognisable traditional English windows. They have been a characteristic feature of English architecture since the 18th century. The two vertically sliding sashes are operated by two independent weight and cord mechanisms introduced by RobertHooke in 1670. Our selection of best quality timber and the hand finish we add, guarantee a unique and stylish look.





Our windows are made of high quality pine, oak and meranti. Other timber is available upon request. Our timber comes from the best suppliers who guarantee that timber is FSC certified, pest-free and at least 80­100 years old.


Sliding Sash Weights use Caldwell and Mighton hardware which is fitted to customer’s individual needs.


Windows may be single, double or triple glazed. Triple glazed units have the best insulating properties. We offer a large selection of glass types:

– soundproof
– esg
– energy efficient
– ornamented
– fireproof
– anti burglar
– solar control

We also offer one­way mirrors, other types of custom made glass and warm spacer bars which increase thermal insulation of a window unit.


Window frames are available in a wide range of RAL colours. Other colours are available upon customer’s request. We use opaque and translucent Teknos Gori paints, which are durable and resistant to fading. External and internal window frame may be painted in two different colors

More about Teknos: Teknos Gori


– stability of shape due to the use of laminated timber,
– good insulation properties certified by Mobilne Laboratorium ,
– resistance to harsh weather conditions confirmed by BM TRADA (BS EN)
– we also offer anti burglar window systems which are certified by BM TRADA


The most common decorative elements are glazing bars and horns.
Available horns (pdf download)
All available glazing bars (pdf download)

Additional information

Technical drawing