Timber window care

Caring for timber windows

Of all the windows you can fit to a house, well-tended timber lasts the longest — it is why so many original Georgian and Victorian sashes are still working today. The trade is upkeep. A hardwood frame kept painted and dry will run past half a century; the same frame left to weather can rot in a fraction of that time. The difference is a modest, predictable routine, and none of it is beyond a careful homeowner.

Paint is protection, not decoration

The single most important job for a timber window is keeping its coating sound. Paint or a microporous stain is what stops moisture reaching the wood, and moisture is the only thing that truly kills a timber frame. Plan a full repaint every five to eight years, sooner on sun- and rain-battered south and west elevations. Between repaints, walk round once a year and touch up any chips, hairline cracks or bare patches before they let water in — a job of minutes that prevents a repair of hours.

The annual once-over

• Wash the frames gently and check the paintwork for damage.
• Feel for any soft or spongy spots, especially along the bottom rails and cills where water collects.
• Rake out and renew any failed putty or sealant around the glass.
• Oil the hinges, catches and sash cords or spiral balances so nothing binds.
• Make sure the frame can drain and the surrounding mastic is intact.

It is the same seasonal habit set out in our window maintenance schedule, with paint added to the list. Keep the hardware moving well and you rarely need to disturb the rest — see window hardware lifespan for renewing the moving parts.

Repair before you replace

Timber has a rare advantage: it can usually be mended. Localised rot can be cut out and spliced, joints re-wedged, cills renewed and cords replaced — a good joiner can often save a frame that looks past it. This repairability is exactly why quality timber sits at the top of our comparison of window material lifespan. Before assuming a period window must go, get a specialist’s eye on it; you can compare local installers who handle heritage timber as well as replacements.

When replacement is the right call

Sometimes the kindest thing is a sympathetic replacement — where rot is widespread, or the frames were never sound. Modern timber and timber-look options can match a period home closely while asking less of you; browse window styles compared to see them. For the wider question of timing, read our hub on when to replace your windows.