Metal windows in mid 20th century buildings

摘要

The Facade Systems of significant 20th century buildings, in particular their windows and doors, are often the most vulnerable elements; not just to weathering, but to changes instigated to 'rebrand' a building, or increase its environmental and acoustic performance.rnThe retention of original fenestration details will be encouraged by heritage approval authorities as new glazing units rarely respect the original fenestration proportions, patterning or relationships to other parts of the facade. Properly maintained, metal-framed windows and doors from the 20th century make a real contribution to our architectural heritage. Their retention maintains the design integrity of a building and has benefits in terms of sustainable practices by reducing the energy spent to upgrade or adapt.