Moisture, mold and ventilation issues

Learn about the types of moisture problems, their impact on health and why they are especially relevant on the Costa Blanca.

The Moisture Cycle

Humidity

Excessive ambient humidity

Condensation

Wet surfaces

Mold appearance

Worst indoor air quality

The World Health Organization notes that indoor moisture and mold growth are linked to an increased risk of respiratory symptoms, allergies, and asthma.

The impact on health

Mold can release spores, allergens, fragments, and irritants into the environment. Exposure to damp or moldy buildings has been associated with an increase in certain respiratory and allergic problems.

Breathing problems

People living or working in damp or moldy environments may experience an increase in certain respiratory symptoms:

  • Cough
  • Throat irritation
  • Nasal congestion or irritation
  • Whistling Breathing
  • Respiratory tract irritation
  • Respiratory distress in susceptible individuals

Who considers moisture and mold important factors related to indoor air quality and respiratory health.

Asthma

Asthma sufferers may be particularly sensitive to certain biological contaminants present in humid environments. Mold can act as a trigger or aggravate symptoms in sensitive individuals.

Controlling moisture and preventing persistent mold growth is an important part of maintaining a healthy indoor environment.

Allergies

Some types of mold produce substances that can act as allergens. Sensitive individuals may experience:

  • Sneezing
  • Nasal congestion
  • Nasal drip
  • Eye irritation
  • Itching or tearing of the eyes
  • Nose and throat irritation

The who recognizes the relationship between moist environments, mold and an increase in allergic problems.

Irritation of eyes, nose, throat and lungs

Mold doesn't just affect people who have allergies. Mold-associated contaminants can produce irritating effects on the eyes, skin, nose, throat, and lungs in both allergic and non-allergic individuals.

A room with a persistent odor of moisture, condensation, or visible mold growth should not be considered simply an aesthetic problem.

Poor ventilation: the hidden problem

One of the most common causes of recurrent mold problems is to treat visible mold without fixing the cause of moisture. A wall can be cleaned today, but if the problem continues to exist, it may reappear.

Proper ventilation helps to remove excess moisture and renew the indoor air. The who recommends combining adequate ventilation with proper moisture control and appropriate insulation and construction conditions.

High humidity

Poor ventilation

Cold surfaces

Problem may reappear

Especially important in homes on the Costa Blanca

The properties of the Costa Blanca can have different factors related to humidity:

High ambient humidity

Condensation

Poorly ventilated bathrooms

Kitchens with inadequate extraction

Homes closed for long periods

Second homes and holiday homes

Air conditioning that recirculates indoor air

Cold exterior walls

Thermal bridges

Water seepage

Problems on terraces and roofs

Moisture in basements and ground floors

Problems arising from old buildings

Excessively airtight modern homes with insufficient air renewal

The who warns that inadequate ventilation can favour the accumulation of pollutants and create favourable conditions for the growth of mould.

Holiday homes need special attention

A property that remains closed for weeks or months can develop moisture problems without the owner noticing.

Less air renewal + accumulated moisture + cold surfaces = increased risk of condensation and mold

That is why we recommend paying special attention to:

  • Holiday homes

  • Closed apartments

  • Rental villas

  • Properties that remain empty during the winter

  • Homes that are visited only a few months a year

Not every moisture problem is the same

Finding mold does not necessarily mean there is a leak. The origin can be very different:

Condensation

Excessive indoor humidity combined with cold surfaces.

Insufficient ventilation

Moist air is not properly removed.

Water filtration

Ingress of water from roofs, terraces, walls, windows or facilities.

Ascending humidity

Moisture from the ground or from certain areas of the building.

Thermal bridges

Areas of the building where the surface temperature is considerably lower and can favour condensation.

Construction or maintenance issues

Defects or deterioration that allow the entry or accumulation of moisture.