The reuse of window frames raises the issue of energy performance. Windows play a crucial role in meeting contemporary requirements for thermal insulation and airtightness of the building envelope.

A distinction should therefore be made between older and newer windows. While older windows will be reserved for applications such as interior refurbishments, heritage restorations or buildings that are not subject to high performance requirements, newer windows can often meet more stringent requirements and be reused in facades. These windows are usually the result of the demolition of recent buildings. There are also lots on the market that are disqualified at the time of delivery because of a dimensional error.

Working with reused windows forces the designers to modify their work process somewhat: they have to dimension the openings to the size of the windows. However, it is often worth the effort, because with greater dimensional tolerance, it is possible to obtain quality elements at competitive prices and thus reduce the cost of an important item in construction projects.


Recent windows

These are complete windows (frame and glazing) salvaged from the demolition or conversion of recent buildings. Sometimes it is also possible to find display models presented in shops or at trade fairs, and even new windows that have not been produced to the right dimensions or that come from overstocks (these last two cases are not strictly speaking reuse since they have never even been used!).

Older windows

Old, often wooden, but sometimes also cast iron window frames with a certain aesthetic value are also available on the reclamation market, usually from specialised traders. These window frames are sold both with and without glass. Since their energy performance is typically not taken into account, such frames are typically used in applications such as interior fittings, heritage restoration or unheated spaces.

Stained-glass windows

These windows are typically restored and resold by antique or heritage specialists. They range from smaller elements, suitable as parts for doors or as blinds behind facade windows, to larger elements from churches. 


In addition to a range of windows or doors, some companies also offer a selection of shutters made of metal or wood. These are usually decorative models.