brandtætte

Brandtætte is a Danish term used in construction and fire protection to describe elements, assemblies, or constructions that are fire-tight, meaning they prevent the passage of flames and smoke for a specified period. The word combines brand (fire) and tætte (tight/sealed). In practice, brandtætte components include joints, penetrations through walls and floors, and openings for cables and pipes that are sealed with rated fire-stopping materials and methods to maintain the integrity of a fire compartment.

In Danish building practice, achieving brandtætness is essential for preserving compartmentation and delaying fire spread. This typically involves a combination of design measures and materials, including fire-rated walls and floors, properly installed doors, and sealing products such as intumescent seals, firestop collars around penetrations, and mineral wool or other insulating fills that can withstand high temperatures. The level of brandtæt protection is related to fire resistance ratings and compliance with national building codes and European standards, such as those governing fire resistance classifications.

The term is used across disciplines, including architectural design, electrical and mechanical services, and safety planning, wherever penetrations or joints could compromise fire barriers. Correct installation and regular inspection are crucial, as improper sealing can undermine fire safety. See also fire resistance, fire stopping, and compartmentation.