Let’s break it down by type of maintenance and frequency to help you build a proper servicing schedule.
Annual Visual Inspection
At least once a year, inspect each window for signs of wear or damage:
- Flaking or cracked paint,
- Soft or discoloured timber,
- Stiff movement or rattling,
- Gaps in seals or putty,
- Water ingress or condensation.
Every 2–3 Years: Draught-Proofing & Hardware Check
Sash cords, pulleys, locks and catches need occasional adjustment or lubrication. Every couple of years:
- Test sash movement and balance,
- Check cords for fraying,
- Tighten any loose screws or latches,
- Clean and lubricate metal fittings.
Every 5–7 Years: Painting or Staining
Paint protects your timber from moisture and decay. Depending on weather exposure, sash windows should be repainted every 5–7 years.
Use breathable microporous paints or stains to allow moisture to escape while shielding the surface. South-facing or coastal windows may need painting sooner due to harsher exposure.
Every 10–15 Years: Reglazing or Major Repairs
If your sash windows are well built and maintained, full restoration may not be needed for over a decade. But if you notice:
- Failing putty or cracked glass,
- Draughts despite sealing,
- Rotted sills or bottom rails,
- Noisy, unbalanced sashes,
… it may be time for professional servicing or even partial refurbishment.
Historic timber often responds well to specialist repairs – a much more sustainable and affordable option than total replacement.
Bonus: After Extreme Weather
Heavy storms, wind, or freezing temperatures can accelerate wear. Always inspect your windows after:
- Prolonged rain,
- Snow or ice build-up,
- High winds or impact from debris.
Why Regular Servicing Matters
A well-maintained sash window:
- Preserves your home’s character,
- Saves money on energy bills,
- Extends the life of your joinery,
- Avoids emergency repairs.
Final Thoughts
With the right maintenance plan, timber sash windows can last over a century. Regular servicing doesn’t just protect your investment – it keeps your home warm, safe, and looking beautiful.
PM Windows offers tailored maintenance plans, annual inspections, and full restoration services – helping homeowners care for their period features the right way.