Thermal Bridges in Buildings: Polyamide Strips Solution

Thermal bridges in buildings, also known as cold bridges, are localized areas within the building envelope where the otherwise continuous thermal insulation layer is interrupted or compromised by a material of significantly higher thermal conductivity. These elements create a preferential path for heat to flow, bypassing the insulation and leading to a multitude of performance issues. Common examples include uninsulated concrete balconies or floor slabs that project through the insulated wall, metal window and door frames that span from inside to outside, structural steel columns or beams penetrating the facade, and even fasteners and brackets used to attach cladding. The consequences of unaddressed thermal bridges are substantial. They result in disproportionately high heat loss, undermining the overall energy efficiency of the building and increasing heating and cooling costs. A more immediate and visible problem is the drop in interior surface temperatures at the bridge location. When this surface temperature falls below the dew point of the indoor air, condensation forms. This persistent dampness creates an ideal environment for mold and mildew growth, which can damage building materials and pose health risks to occupants. In cold climates, this can even lead to ice formation inside the structure. Furthermore, thermal bridges can cause thermal discomfort due to radiant temperature asymmetry, where occupants feel cold near these poorly insulated details. Identifying and mitigating thermal bridges through careful design, the use of thermal break materials, and continuous insulation is therefore a critical aspect of constructing durable, healthy, and energy-efficient buildings.