Moisture and humidity levels are among the main causes of health problems and discomfort in the built environment. Buildings experience moisture buildup from human breath, perspiration, plants, cooking, and washing. This condensation accumulation promotes mildew and mold growth, and excess humidity can additionally promote dust mites.
Wool has the natural ability to regulate the humidity of a room by absorbing moisture when the atmosphere is damp and releasing it when the atmosphere is dry. Wool can absorb nearly 40% of its own weight in water and still feel dry to the touch.

PURE WOOL LIFE INSULATION managed humidity in the atmosphere like no other insulating fiber.  At about 65% relative humidity PURE WOOL LIFE INSULATION will absorb moisture into it complex structure without feeling wet.  It will absorb up to a third of its own weight of moisture and still be dry!  Once the relative humidity drops below 65% it releases the moisture into the atmosphere.  This keeps a more constant humidity level and temperature, thereby eliminating the environment for mold to grow.  Mold is the major contributor to allergies and bronchial problems.

Wool is an efficient moisture buffer in buildings, and because wool can “breathe,” it is ideal for clients in humid or damp climates. Because the insulating properties of wool are stable across a wide range of moisture levels, this provides more consistent performance in living buildings.

Mold and Your Home

Mold is found both indoors and outdoors. Mold can enter your home through open doorways, windows, vents, and heating and air conditioning systems. Mold in the air outside can also attach itself to clothing, shoes, bags, and pets can and be carried indoors.

Mold will grow in places with a lot of moisture, such as around leaks in roofs, windows, or pipes, or where there has been flooding. Mold grows well on paper products, cardboard, ceiling tiles, and wood products. Mold can also grow in dust, paints, wallpaper, insulation, drywall, carpet, fabric, and upholstery.

In one word, Wool Controls Mold Inside your home by controlling humidity levels.

IWTO wool sheep welfare guidelines_2014_1 CONTROL-OF-INDOOR -AIR-POLLUTION FlameResistance_CMSE_PDF Standard