Sash Window Fault Finder

Choose the symptom closest to your problem. These links provide initial guidance; they do not replace a site-specific safety assessment.

• The sash drops or will not stay open
• The sash sticks or will not move
• The window is painted shut
• The window rattles
• Cold air comes through the window
• The pulley squeaks or jams
• The sill feels soft or rotten

If the sash is unstable, the glass is damaged or timber decay is extensive, stop and consult a qualified professional.

Start with the most obvious symptom

A sash that falls, sticks, rattles or admits water needs a different repair. Choose the closest symptom from the links above, then inspect the relevant guide before deciding whether any work is appropriate.

Record useful clues

Note whether the problem affects the top or bottom sash, whether it changes with wet weather, whether cords are visible and whether the glass or timber is loose. Photos of the meeting rails, sill and pulley area can help a repairer.

Stop if there is immediate risk

A sash that drops suddenly, unstable glazing, severe decay or work at height calls for professional help. Do not dismantle heavy windows or disturb suspect lead paint without appropriate training and controls.

Further reading

Use our sash window fault finder, maintenance checklist and tools and materials guide for related advice. If a repair is beyond safe DIY maintenance, contact The Sash & Case Window Company.