Norway: Traditional methods for heat retention in homes and clothing

Norwegian practices for maintaining warmth in extreme temperatures, even below −30°C, focus on structural insulation and specialized textile techniques.

In residential construction, heat retention is achieved through high-quality thermal insulation in walls and roofs, measured by low U-values. To prevent heat loss through air leaks, new buildings often undergo a ‘blower door test’ to identify gaps around windows, doors, and pipes. High-efficiency triple-glazed windows are also a standard feature to minimize thermal transfer.

Traditional Norwegian knitwear also utilizes specific techniques to combat cold. Unlike standard single-thread sweaters, traditional patterned jumpers use a multi-color knitting technique where a second thread is carried along the inside of the garment. This creates a denser material with trapped air between the threads, acting as a natural insulator to slow the loss of body heat.