More humid climate

Mild and humid winters increase biological activity

The warmer and wetter winters of the coming decades will provide better conditions for biological activity. It affects the durability of building materials and the indoor climate.

As the temperature rises, the air can contain more water. Greater humidity can increase problems with, for example, mould and house dust mites, which have better living conditions. In our increasingly airtight houses, there may therefore be a need for better ventilation.

A milder climate can also mean that rot, fungi, and old house borer attacks will worsen. It will challenge exposed structures and building components, especially in organic materials such as wood and certain types of plastic, paper, cardboard, and paint. Choosing other materials for construction, surface treatment, and maintenance more frequently may be necessary.

A more humid winter climate will also challenge construction workers, who, in execution, must show care in building correctly in terms of moisture. Keeping materials and components dry and protected from moisture during transport and storage on-site is essential. Likewise, avoiding the exposure of building components to rain and snow during construction is crucial. Avoid using wet building materials, like insulation mats, in construction. It is essential to set aside time for drying out, for example, concrete elements and cast in situ.