How to prevent dampness at home: tips for a healthy living environment

Dampness at home is not just a matter of comfort. High humidity feeds the growth of mold, mildew and fungus, damaging furniture and the structure itself. Prolonged exposure to damp, moldy air is also a real risk factor for breathing problems and other health issues among the people living there.

This article looks at what humidity actually is, the dangers of long-term exposure to it, and practical ways to prevent and reduce those dangers, so you can keep your home pleasant and healthy.

What is humidity

Humidity is simply the water vapor present in the air, and it comes in two forms.

Relative humidity: how much of the air's capacity for water is actually filled

At a given temperature, air can hold only so much water.

Relative humidity is expressed as a percentage: the amount of water vapor actually in the air, against the maximum it could hold.

At 100%, the air is completely full and cannot take on more.

At 30% relative humidity, there is still plenty of room for more water in the air.

Hot air can hold more water than cold air, which is why the air often feels more humid on hot days.

Absolute humidity: how much water is in the air, regardless of what the air could hold

This measures the amount of water per unit volume of air, in grams per cubic meter.

Absolute humidity is the total amount of water present at a given moment. If the temperature rises, the air can hold more water, so relative humidity drops, but the absolute humidity stays the same.

The effects of high humidity

High humidity at home, above 60%, brings a feeling of heat and stickiness and encourages mold and mildew to grow. These are fungi that release toxins into the air, which can trigger allergic reactions, breathing difficulties, asthma attacks and even infections. Children and the elderly are especially vulnerable to the health effects of high humidity.

Dampness on walls peels paint and lets mildew spread, eventually damaging the structure itself as well as furniture and books.

Low relative humidity, below 40%, brings its own problems: dry skin, respiratory irritation, and coughing.

The ideal range is 40 to 60% relative humidity. Staying within it helps prevent damage from humidity in either direction.

Signs of high humidity at home

Catching the signs of humidity early means you can treat the problem before it causes damage, and it helps improve the quality of life at home. These are the signs of high humidity:

• Mold and fungus stains: mold looks like black, green or white stains, and can appear on walls and ceilings, as well as on clothes, furniture, or curtains.
• Musty and moldy smells: the smell can be strong, especially in enclosed or poorly ventilated rooms.
• Condensation on windows: a thin film of water from condensing vapor, most often visible in the morning.
• Damage to furniture and the building: swollen wood, doors that stick, paint peeling off walls or furniture.
• Worsening health problems: allergic reactions, breathing difficulties, asthma, or skin reactions such as itching and rashes.

Testing for dampness and humidity at home

A range of advanced equipment can help pin down the source of the problem. The measuring tools include:

1. Thermal (infrared) camera: picks up temperature changes that point to dampness or mold.
2. Moisture meter: measures dampness directly in materials such as wood, gypsum board, and walls.
3. Pressure gauge: measures air pressure inside ventilation and air-conditioning systems, helping trace humidity problems back to poor airflow.
4. Fiber optics: a technology for inspecting ducts and enclosed spaces without excavation or damage to the structure. It helps find dampness in places that are otherwise hard to reach.

How to prevent dampness at home

Proper ventilation

Good ventilation is the key to keeping humidity at home at an optimal level.

• Open windows whenever the weather allows it.
• Run extractor fans in bathrooms and kitchens, especially while cooking or showering.
• Dry laundry outdoors, or in a well-ventilated area, rather than indoors.
• Ventilate areas with potted plants too.

Dehumidifier / moisture absorber

A dehumidifier lowers the humidity level by pulling water out of the air and collecting it in a tank. It is an ideal solution for spaces with high humidity, such as basements or bathrooms.

Maintenance of the piping

Leaks and plumbing problems can cause dampness in the walls. Check the home regularly and fix any problem as soon as it turns up, to keep mold and mildew from spreading.

Insulating windows and walls

Insulating windows and walls creates a barrier that limits how much moisture transfers in from outside, and protects your walls from damage caused by condensation.

Air conditioning

The higher the temperature, the more water vapor air can hold. Cooling the home with air conditioning helps regulate humidity levels too, creating a living environment that is not only more comfortable, but healthier.

Summary

Preventing dampness at home is essential for a healthier living environment.

Arad Bedek Bayit specializes in rigorous engineering inspections.

Our team includes certified engineers with extensive experience finding and diagnosing dampness and humidity problems.

Contact us for guidance on finding, treating and preventing dampness problems in your home.

Phone: 077-670-4444