Is it true or false that the orientation and compression of mineral wool in joints is critical?

The statement is true because the orientation and compression of mineral wool in joints are crucial factors in ensuring effective fire stopping. When mineral wool is used as a firestop material, it must be installed correctly to maintain its intended performance characteristics.

The orientation refers to the way the mineral wool is positioned within the joint. Proper orientation enables the material to provide optimal coverage and fill the space adequately, which is essential for preventing the spread of fire and smoke through joints.

Compression of the mineral wool is equally important as it enhances the density and thermal performance of the material. When the mineral wool is properly compressed in the joint, it reduces the likelihood of gaps that could allow fire to penetrate through the assembly.

Therefore, both the orientation and compression of mineral wool are critical to creating a reliable firestop system that meets building code requirements and provides safety in the event of a fire.