The timber fire protection property makes timber fire retardant. It makes timber frame building structures less rapidly combustible by reducing the spread and the fuelling of the fire.
Fire protection acts at the surface of impregnated or coated timber elements. The action of the flames on the timber will create a charred surface layer. This will create a protective barrier that will lower the heat flow and thereby limit the damage to timber materials, the fuelling of the flames and the production of smoke.
The timber “fire retardant” treatment is passive fire protection.