Sticking, rattling and dropping describe different faults. Record which sash is affected and when it happens. A sash that drops or has a damaged cord needs prompt professional attention; do not force, dismantle or prop up an unstable window.
A window that will not open
First check that you have released the normal locks or restrictors in accordance with their instructions. If the sash still will not move, stop. Paint, distortion, moisture or a mechanical problem may be involved. Cutting, levering or planing without a diagnosis can damage the window and may conceal the original cause. Tell the repairer whether the problem began after painting, wet weather or other building work.
A sash that falls or feels unusually heavy
Traditional cords connect the sash to concealed counterweights. Failure in this system can make the sash difficult or unsafe to use. Keep the window closed if it is safe to do so, prevent others from operating it and arrange an inspection. Do not lean out, remove beads or open the weight box to investigate. HES describes sash removal for cord replacement as a job best carried out by joiners in its repair guidance.
Rattling in the wind
Describe where the sound comes from: the moving sash, a fastener or a particular pane. Note whether it happens only in strong wind or with the window partly open. Avoid using permanent sealant across moving joints as a quick fix. Ask the surveyor to distinguish movement of the sash from loose glazing and to explain how the proposed repair will preserve normal operation.
What information helps before a visit?
- A photograph of the complete window from inside.
- A close view of the affected area taken from a safe position.
- Whether the upper sash, lower sash or both are affected.
- When the fault began and whether it varies with the weather.
- Any recent painting, glass replacement or building work.
- The floor level and any access restrictions.
A short video can help describe a noise, but do not operate a defective sash just to record one.
Does a mechanical fault mean replacement?
Not automatically. Request an explanation of the mechanism fault separately from the condition of the timber. Ask whether the proposed price includes pulley checks, balancing, reinstatement of beads and final operation checks. If replacement is recommended, ask which physical defects make repair unsuitable.
What should be checked after repair?
Ask the installer to demonstrate normal operation, fastening and any restrictors. Obtain instructions for any new fittings and agree whom to contact if stiffness or unusual movement returns. Keep the repair record so that future maintenance starts with an accurate history.
Related advice and services
Back to all sash window resources
Discuss your windows
For a property in Stirling or Central Scotland, contact The Sash and Case Window Company with photographs and a description of the problem. An inspection can establish which work is appropriate for your windows.