Mould room by room: where it grows in Cyprus homes and what to do

Why mould picks the rooms it does

Mould needs three things: moisture, a surface to grow on, and still air. Every room in a home has a different mix of the three, which is why mould turns up in the same places again and again. In Cyprus the moisture usually comes from condensation in winter, when sealed apartments and cold external walls meet warm, damp indoor air. Coastal humidity in Limassol, Larnaca, Paphos and the east coast adds to it, air conditioning creates cold surfaces of its own, and older ground-floor homes can draw damp up from the ground.

This guide goes room by room: why mould grows there, what you can do about it yourself, and when it's a sign of something bigger.

Bathroom

Every shower fills the room with warm, wet air, and in a small space with little airflow that moisture settles on the coldest surfaces. It's the most common place mould turns up, especially in windowless bathrooms. Watch the silicone, the grout lines and the ceiling above the shower.

• Mould in the bathroom: why it happens and the three habits that stop it.
• Mould on the bathroom ceiling: why it starts above the shower and keeps coming back.
• Mould on grout and tiles: the deep-clean method, and when grout or silicone needs replacing.

Ventilate during and after every shower, wipe down wet surfaces and keep the extractor running. Mould that returns within days or spreads onto the walls means the ventilation isn't keeping up.

Kitchen

Cooking, washing up and the dishwasher all put moisture into the air, and closed cupboards keep it there. Much kitchen mould is hidden: under the sink, inside cupboards against external walls, behind the fridge and along the sealant behind the worktop. A slow leak under the sink is the most common hidden cause.

• Mould in the kitchen: the hidden hotspots to check.
• Green mould in kitchen cabinets: why cupboards grow it and how to keep them dry.

Bedroom

Bedrooms are shut for hours every night while we breathe out moisture. That damp air condenses on the coldest surfaces, so bedroom mould tends to appear low in a corner, behind the bed or on the back of a wardrobe pushed against an external wall. Because you spend so much time there, it's worth dealing with promptly; if anyone has a cough, wheezing or other symptoms, speak to a doctor.

• Mould in the bedroom: causes, health and how to stop it.
• Mould on mattresses: when it can be cleaned and when it's time to replace it.
• Mould in wardrobes and on clothes: how to save your clothing and stop it happening again.

Living areas, furniture and soft furnishings

Furniture goes mouldy for two reasons: humidity in the room and no air moving around the piece. A sofa or cabinet flush against a cold wall traps condensation behind it, and the mould grows on the furniture and the wall alike. Soft and porous materials hold moisture longest.

• Why furniture goes mouldy, how to save it, and what to do when mould has gone deep into wood.
• Mould on leather, fabric and upholstery: cleaning it without spreading spores indoors.
• Mould on carpets and rugs: why it hides underneath and when carpet can't be saved.

Pull furniture a few centimetres off external walls, don't pack wardrobes and cupboards tight, and check the wall behind anything that has gone mouldy.

Windows

Windows are where warm indoor air meets the coldest surface in the room, so condensation forms on the glass and frame, runs into the tracks and soaks into the plaster around the frame. Black spots on the sealant and staining on the reveals are the usual result. Mould around windows in Cyprus homes covers why it happens and how to keep frames dry.

Air-conditioning units

Air conditioning is essential in a Cyprus summer, but the unit cools surfaces below the point where moisture condenses, and its filters and drain collect water and dust. A musty smell when the AC runs, black spotting on the vents or staining on the wall nearby are the signs. See mould around air-conditioning units for keeping filters, drains and nearby walls clear.

Attic and roof space

Warm, moist air rising from the home condenses on the cold underside of the roof and on timbers, and poor roof-space ventilation traps it. Because attics are rarely visited, mould can build up unseen. Timber or large areas affected need assessing rather than cleaning. More in mould in the attic or roof space.

Basements and ground-floor rooms

Rooms in contact with the ground can draw moisture up through the walls and floor. Tide-marks, blown plaster, salt deposits and a persistent musty smell point to damp rising from the ground, which cleaning and paint won't fix. See mould in the basement for why the moisture path has to be blocked.

What you can handle and what needs help

Small surface patches in one spot, with an obvious cause like a shower or a wardrobe against a cold wall, are usually a DIY job: ventilate, clean with an anti-microbial product rather than bleach on porous surfaces, dry the area and change the habit that caused it. How to remove mould from walls covers the safe method and where DIY stops.

Get help when the mould is larger than about a square metre, keeps coming back, has soaked into plaster or wood, or comes with a strong musty smell. For light surface growth, treatment for surface mould starts from €125; when it has rooted into the plaster or keeps returning, removal starts from €175.

When it's in more than one room

Mould in a single room usually has a single cause. Mould in several rooms at once suggests something affecting the whole home: general humidity, a ventilation problem, rising damp or a leak. That's when it pays to find the source before treating anything. Why one room is always mouldy explains how to narrow it down, and an inspection from €75 finds the moisture source when you can't.

Mould in more than one room? Arrange an inspection from €75 or call +357 99 759144.