‘A double storey can also affect the roof so it very much needs to be considered as part of the overall design.’ A two-storey extension also creates issues in respect of the internal layout.

Flat roof extensions are constructed using a deck which could be made up of softwood boards finished with a bitumen coating. However, increasingly, they are made using thick sheets of weather- and ...

A contemporary flat-roofed addition to a historic home might be the perfect extension idea, while a pitched roof that complements a certain style or tradition might be the better option for another.