lämpökovuudella

The term "lämpökovuudella" is a Finnish expression derived from the noun "lämpökova" which refers to a thermal bridge. A thermal bridge (or thermal corridor) is a part of a building envelope that allows heat to pass more easily through the structure than the surrounding materials. Such bridges can occur at structural joints, electrical conduits, window frames, or where different construction materials meet, and they are typically found in uninsulated or poorly insulated building assemblies.

Thermal bridges create localized heat loss, leading to increased energy consumption for heating or cooling. They can also cause condensation inside the wall cavities, promoting mold growth and material deterioration. In Finland, where heating demand is significant due to long, cold winters, the presence of thermal bridges is a major concern for building performance and indoor comfort.

Modern building codes, such as the Finnish National Building Regulations, require the minimisation of thermal bridges. Construction practices aiming to eliminate or reduce them include continuous insulation layers, use of thermal break materials, careful detailing at joints, and the installation of insulated structural members. Building designers also employ thermal modelling and simulation to identify potential bridges before construction.

Insulation effectiveness can be measured by the heat flow through the building envelope. Screens, infrared thermography, and heat balance calculations help detect and quantify thermal bridges. After identification, remedial measures often involve adding additional insulation, using composite materials, or redesigning structural details.

Mitigation of thermal bridges is essential for compliance with energy efficiency standards, improved indoor comfort, and avoidance of corrosion or mold issues. By addressing thermal bridges early in the design phase, occupants benefit from lower heating costs, a larger lifespan of building elements, and a healthier living environment.