It’s Ireland and old sash windows can be draughty. In the majority of instances, draughty sash windows are a result of gaps between sashes and the window frame. It can also be blamed on windows not being installed properly.
Draughty sash windows
The solution to a draughty window caused by gaps between the sashes and frame/case is to install or replace weather seals. If your windows already have draught seals, these may be worn down over time. Alternatively, they can get damaged by painting over the seals; drying paint transferring to the seals from freshly painted sashes that have been closed before the paint dries; or seals can be torn when sticking windows are opened.
Installing or replacing draught seals and brushes is a straight-forward and cost effective measure that will seal gaps and provide significant savings in energy and to your pocket.
In general, Advance Glazing can draught proof three to four windows per day.