Why Yorkshire weather is hard on a piano

Anyone who has lived in Yorkshire knows the ritual: you dry the washing indoors because it has rained for a week, you notice a patch of damp behind the wardrobe, and you keep a dehumidifier in the back bedroom. What many households do not realise is that the same conditions are quietly working on the family piano in the front room.

A piano is a wooden instrument under enormous tension. An upright holds roughly eighteen tonnes of string tension, and the soundboard that carries it is a thin, curved sheet of spruce, perhaps eight millimetres thick. Around it sit felt, leather, wool, cloth and steel. Every one of those materials responds to moisture in the air, and they respond at different rates. When the air swings from a wet Pennine October to a centrally heated January, the piano absorbs and releases water constantly. Most damage we see in local homes is not the result of one disaster, but years of small, repeated movements.

What humidity swings actually do to your instrument

The problems show up in predictable ways, and they usually arrive in this order.

• Sticking keys. The felt and cloth bushings around the key pins swell in damp air and grip the pins. Notes begin to feel heavy, then refuse to return. This is the single most common complaint after a wet spell.
• Tuning instability. The soundboard swells and rises, pushing the strings slightly sharp; when it dries and flattens, pitch drops. A piano can drift a quarter-tone in a season without anything being wrong with it.
• Cracked soundboards. This is the serious one. Wood dries and shrinks across the grain far more than along it, and a soundboard that is gripped at the edges has nowhere to go. Cracks open, often with a sharp report late at night, and can cause buzzing or a loss of tone.
• Rust and tarnishing. Steel strings, tuning pins and bridge pins corrode in persistently damp air, and rusted strings sound dull and break more readily.
• Loose glue joints and sluggish action parts. Hammer centres, damper felts and wooden action components all suffer when they cycle between damp and dry.

None of this happens overnight. That is exactly why a little routine care makes such a difference.

Start by measuring, not guessing

Before you buy anything, find out what the air in your piano's room is actually doing. A simple digital hygrometer costs very little and tells you more than any amount of intuition. Place it close to the piano, at roughly the height of the strings, and keep it away from radiators, sunny windows and open doorways, all of which give false readings.

Take readings morning and evening for a fortnight, and write them down. You will quickly see the pattern: the room that sits at 65 per cent in November may drop to 30 per cent once the heating is on. Note also that cheap hygrometers can drift by several per cent, so treat the figures as a guide rather than gospel. If a reading seems odd, borrow a second unit before acting on it.

Aim for forty to sixty per cent

The widely accepted comfort zone for a piano is 40 to 60 per cent relative humidity, with 45 to 55 per cent being ideal. Stability matters more than hitting an exact figure. A piano that lives at 58 per cent all year will fare far better than one that lurches between 35 and 70.

Practical steps for a typical Yorkshire home:

• Dry washing in a different room, or outdoors when you get a dry, breezy day. A single airing rack can add several per cent to a room's humidity.
• Move the piano away from solid external walls, especially old stone or brick without a modern damp-proof course. Leave a gap of at least ten centimetres.
• Keep pans lidded and bathroom doors shut while the shower runs.
• Ventilate on dry days rather than leaving a window ajar through a week of drizzle.
• Do not park the piano against a radiator or underfloor heating vent, because dry heat is as damaging as damp air.

Dehumidifiers, humidifiers and targeted help

A good room dehumidifier set to maintain around 50 per cent will transform a damp front room, and it will help your furniture, your books and your lungs as well as your piano. Empty it regularly, keep doors and windows shut while it runs, and give it a break in very dry weather.

For instruments in genuinely difficult rooms, a specialist piano dehumidifier is the more elegant answer. These are slim, rod-based units fitted inside an upright or beneath a grand, with a humidistat that switches them on only when needed. Some systems combine a humidifying and dehumidifying element, which is ideal for rooms that swing in both directions. Choose a system designed for the size and type of your instrument, and have it installed properly so that cables and water collection never touch the action or the strings.

Tuning, timing and knowing when to call

Book a tuning after the seasons have settled, not in the middle of a swing. Two visits a year, one in late spring and one in late autumn, suits most Yorkshire homes well. If your piano has just had a dramatic change in environment, give it a fortnight to settle before anyone touches the tuning pins.

Call your technician sooner rather than later if you notice sticking keys, buzzing notes, a rattle on certain pitches, or a note that suddenly sounds wrong. These are usually small, inexpensive fixes if caught early, and expensive ones if left. A well-cared-for piano, kept steady and tuned regularly, will serve a household for decades. Look after it, and it will keep singing through every damp Yorkshire winter.