Maintaining a Timber Staircase in Indian Humidity

Timber treads are the most comfortable surface on a staircase and the least forgiving of bad habits. In India the thing that shortens their life is not footfall. It is moisture, arriving twice a year in opposite directions.

Wood moves, and in India it moves twice

Timber takes up moisture from the air and gives it back. Through the monsoon it swells; through the dry months it shrinks. That cycle is normal and a well-built staircase allows for it.

What it means in practice is that small seasonal gaps at the ends of treads are not defects. They open in summer and close again in the monsoon. Filling them in March produces a tread that is too tight in July, which is when squeaks and split finishes start.

Dense hardwoods such as teak move less and handle humidity well, which is why teak has been the default in Indian homes for generations. Softer timbers move more and need more tolerance built in.

Cleaning: less water than you think

• Sweep or vacuum before anything wet. Grit underfoot is an abrasive. It does more damage to a finish in a month than a year of ordinary walking.
• Never wet-mop. A barely damp cloth, wrung until it will not drip, is enough. Standing water swells the fibres and lifts the finish at the tread nose and the edges.
• Clean along the grain. Cross-wiping drives grit across the fibres and shows as fine scratching under low light.
• Dry behind you if you have used any water at all.
• No steam mops. Heat plus moisture is the fastest way to lift a finish off timber.

The tread nose wears first, and that is fine

Every timber staircase wears at the front edge of each tread, because that is where the foot lands and pivots. It is not a fault, and it is the single best reason to check a timber staircase once a year.

Catching it while the finish is thin means a light sand and a recoat. Leaving it until bare timber shows means the wood itself starts absorbing moisture and dirt, and then the repair is a replacement tread rather than a coat of finish.

Timber is the only tread material that can be renewed in place. Stone, glass and steel cannot be sanded back. A worn timber staircase is rarely a lost cause, which is worth remembering before anyone quotes you for a new one. Our guide to repairing or replacing an old staircase covers where that line sits.

Sunlight is the other half of the problem

Stairwell windows are usually tall and usually unshaded, so a strong shaft of sun lands on the same two or three treads all year. Those treads fade and their finish degrades faster than the rest of the flight, which produces a staircase that looks patchy rather than worn.

• A sheer curtain or film on the stairwell window costs almost nothing and prevents it.
• A runner protects the treads it covers, but it also shields them from fading, so the uncovered edges will end up a different shade.
• If a flight has already gone patchy, refinishing the whole staircase evens it out. Spot-refinishing rarely matches.

Squeaks and the humidity connection

Timber squeaks are usually two surfaces rubbing where a joint has loosened. On a staircase with a steel structure and timber treads, the noise often follows the seasons: fixings that were tight in May are not tight in October, because the timber around them has changed size.

Re-tightening after the monsoon fixes most of it. If a noise follows the time of day rather than the season, it is more likely thermal movement in the metal than anything to do with the wood.

A yearly routine that takes twenty minutes

• After the monsoon, re-tighten tread and baluster fixings.
• Look along the flight in raking light for thin or dull patches at the tread noses.
• Check for any tread that feels different underfoot from its neighbours.
• Recoat when the finish is thin, not when the timber is bare.
• Keep a note of when it was last refinished. Most people cannot remember, and that is how it gets left too long.

For the other materials on the same staircase, and a seasonal schedule built around the monsoon, see our staircase maintenance guide. If you are choosing treads, staircase materials for Indian conditions compares timber against stone, glass and steel.