Vented low-slope roofs are common in mid-rise wood construction. They often function as exterior walkways or terraces for building occupants. The vented low-slope roof system is a high-risk assembly as moisture often penetrates into the floor joist cavity.

ROCKWOOL COMFORTBATT® insulation is the ideal batt insulation for this system as it will maintain consistent thermal performance even in the presence of moisture. This ensures the building energy savings will be maintained over the long term.

If moisture accumulates in the ceiling cavity, the insulation will not become a medium for mold or fungal growth. The stone wool batts are water-repellent and any moisture that manage to penetrate into the insulation will dry outwards as the batts are highly vapor permeable. These properties improve the overall durability of the roof assembly.

Stone wool can be used as a component in fire-rated roof assemblies as it non-combustible and will not promote the spread of smoke or fire, providing crucial extra time for occupants to evacuate in the case of fire.