Traditional sash windows can develop familiar faults over decades of use. Identifying the underlying cause is the first step towards a durable repair.
Sash will not stay open
A broken or detached cord, incorrect counterweight or faulty balance mechanism can prevent a sash from holding its position. Do not prop a heavy sash unsafely while inspecting it.
Rattling and draughts
Loose beads, worn meeting rails or out-of-square sashes can create movement and gaps. Adjustment and well-designed draught seals may help.
Rotten sill or lower rail
Rainwater and failed coatings often affect exposed lower components first. Probe suspect areas carefully and have the extent of decay assessed before deciding on a repair.
Condensation and misted glazing
Moisture on the room-side surface differs from misting trapped between panes of a sealed double-glazed unit. The causes and remedies are different.
Painted-shut windows
Layers of paint can bridge moving joints. Releasing them requires care to avoid broken glass, damaged historic finishes and unsafe sudden movement.