Edinburgh sash windows are built to last — but they do need maintenance. The problem is that most homeowners don’t notice the early warning signs until the damage is expensive. Here are seven indicators that your sash windows need professional attention, and what to do about each one.
1. The Upper Sash Drops or Won’t Stay Up
The most common sash window complaint. If the upper sash won’t stay raised, the sash cord on one or both sides has failed. The window is being held up by friction alone — which means the sash could drop without warning. This is a safety issue and needs addressing promptly. A cord replacement costs £80–£150 and takes half a day.
2. Significant Draughts Around the Frame
Some air movement through an old sash window is normal. But if you can feel a sustained cold draught at rest, the brushpile draught seals have worn out, or the window was never professionally sealed. We fit 18mm brushpile seals that eliminate up to 86% of heat loss — and the difference in comfort is immediately noticeable.
3. Stiff or Grinding Operation
Sash windows should slide smoothly and quietly. A grinding noise or heavy resistance usually means the pulleys are seized, the staff bead is too tight, or paint has built up in the channel over decades of repaints. This is almost always fixable in a day without replacing any timber.
4. Soft or Spongy Timber Around the Sill
This is the one to catch early. Press your thumbnail firmly into the timber around the bottom rail and sill. If it feels soft, spongy, or your nail leaves a mark without effort, timber rot has set in. Edinburgh’s damp climate accelerates decay once water ingress begins. Caught early, a rotted section can be cut out and replaced with a matching European Redwood (Pinus sylvestris) splice for £200–£400. Left another year, you may need a full frame replacement at £1,500–£3,500.
5. Rattling in Wind
Rattling usually means the sashes have become loose in their channels, typically because the staff bead has shrunk or been removed. It can also indicate worn or missing draught seals. Either way, it’s a relatively simple fix — and it also means your windows are a significant source of heat loss and noise ingress.
6. Cracked or Missing Putty
The glazing putty is what seals the glass into the frame. When it cracks and falls away, water can get behind the glass, rotting the rebate and eventually loosening the pane. Reputting is a quick, inexpensive job — but only if done before rot sets in.
7. Condensation Between Panes (Sealed Units)
Some Edinburgh sash windows have had sealed double-glazed units retrofitted. When the seal on these units fails, condensation forms between the panes and cannot be removed. The unit needs replacing — though the surrounding sash frame is often perfectly sound and should not be discarded.
Noticed any of these signs? The sooner you act, the cheaper the repair. Request a free assessment →
Related: Sash and case window repairs Edinburgh | Timber rot repair service | Cord and weight replacement