Velisolerede

Velisolerede is a Danish term, also used in Norwegian, meaning "well-insulated." It describes materials, assemblies, or buildings designed to minimize heat loss by having low thermal transmittance (low U-values) and reduced heat leakage. The term is commonly applied to elements such as walls, roofs, floors, windows, doors, and to whole buildings.

Achieving velisolerede construction involves several practices. Continuous insulation with careful detailing reduces thermal bridges. Materials like mineral wool, expanded or extruded polystyrene, and polyurethane foams are used for effective thermal resistance. Airtight construction and proper sealing are essential to limit air leakage, often complemented by appropriate vapor barriers where moisture control is needed. Ventilation with heat recovery helps maintain indoor air quality while retaining energy savings. High-performance windows and doors with low U-values also contribute significantly to overall insulation.

The concept supports energy efficiency, lower heating and cooling demands, enhanced indoor comfort, and reduced environmental impact. In practice, velisolerede buildings align with national or regional building regulations and energy standards in Nordic countries, which set targets for airtightness, insulation levels, and overall energy performance. It is closely related to broader trends in sustainable design, including passive-house principles and rigorous moisture management. Poor installation or excessive insulation without adequate ventilation can lead to moisture problems and reduced indoor air quality, underscoring the need for integrated design and workmanship.