wood doors

Door core: It is made from special materials such as high-density fire-retardant chipboard, calcium silicate boards, or layers of basalt mineral wool. These slow down heat transfer.

Intumescent seals: This is a crucial component. The seals are installed on the edge of the door or on the frame, and at high temperatures (above 150–200°C) they expand several times in volume, completely sealing the gap between the door and the frame to block the passage of flames and hot smoke.

Certified hardware: Hinges, locks, handles, and automatic closing systems (door closers) must be certified for fire resistance. They are made from materials that do not melt or fail quickly at extreme temperatures.

Door frame: It is usually made from treated solid wood or fire-resistant composite materials, completing the protective barrier.

Doors are classified according to European standards, the most common markings are: EI 30, EI 60, etc.