Restoring sash windows requires the right timing. While professional restoration can happen year-round, some seasons offer clear advantages when it comes to longevity, finish quality, and convenience.
Here’s a breakdown of when and why to restore your sash windows throughout the year.
Spring – Ideal for Most Repairs
As temperatures warm and days grow longer, spring is one of the best times to restore or repaint sash windows.
Benefits:
- Timber is dry after winter damp,
- Paints cure evenly in moderate temperatures,
- You prepare your home for summer ventilation.
Most specialists see an uptick in demand this time of year – so book early.
Summer – Great for Painting and Major Restorations
Summer offers stable, dry conditions ideal for:
- Full sash replacements,
- Paint stripping and re-coating,
- Draught-proofing upgrades.
Heat helps speed up paint drying, but extreme temperatures or direct sunlight can be a challenge. Professionals know how to schedule and shade work areas to ensure a flawless finish.
Autumn – Last Chance Before Winter
If you’ve noticed rattling sashes or flaking paint during summer, early autumn is your last opportunity to fix them before winter sets in.
Why autumn matters:
- You improve insulation before colder months,
- Less moisture in the air than in winter,
- Ideal time to service or re-balance sashes.
Don’t wait too long – frost and rain make November a gamble.
Winter – Still Possible, But With Care
While not ideal for painting or external woodwork, winter can still be suitable for:
- Draught-proofing,
- Cord replacement,
- Hardware and lock upgrades.
Indoor work, such as reglazing or secondary glazing, can also proceed in winter months.
The key challenge is moisture – if timber is wet or cold, paint and sealants won’t adhere properly.
Other Considerations:
- In listed or conservation properties, approvals might affect timing – factor this into your plans.
- Lead times with quality joiners (like PM Windows) can be 6–10 weeks in peak seasons – book early.
- Plan ahead if scaffolding or external access is needed, especially in urban areas.
Final Thoughts
While restoration can happen year-round, spring and summer are generally best for external work and full repainting. Autumn is your last call before winter, and internal upgrades can still happen during colder months.
If you're unsure when to begin, contact PM Windows. We’ll advise the ideal time based on your home, your goals, and the British climate.
