The older houses would have a very poor thermal insulation standard when compared with modern housing, given the increase in regulatory standards of insulation over the last 10 years.
All the external elements of the building including the roof, external walls, windows and ground floor will give rise to heat loss. However the majority of the heat loss will be through the windows and roof.
For example, timber windows would be better in an older, period-style house. However, on the other hand, uPVC windows require less maintenance and this could be useful particularly if access is poor for maintenance.
Safestyle UK PLC (LON:SFE) have been manufacturing and installing affordable, high quality, energy efficient and secure windows and doors for homeowners across England and Wales for over 20 years.
