Low-slope roofs are common in mid-rise wood construction. They often function as exterior walkways or terraces for building occupants. Stone wool insulation installed in a conventional roof assembly provides excellent long-term thermal performance for the roof system as it will not change shape over time. This also minimizes potential stresses on the roofing membrane. ROCKWOOL TOPROCK® DD provides reliable thermal resistance across a range of temperatures ensuring consistent building energy savings. TOPROCK® DD PLUS also includes an asphaltic facing eliminating the need for a protection board when applying torch-on or hot-applied roofing membranes.

The conventional assembly is resistant to moisture as TOPROCK® DD has a high drying potential as stone wool is highly vapor permeable.

Stone wool insulation 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 in the case of fire. The fire-resistant properties of stone wool also provide excellent protection when torch-on or hot-applied roofing membranes are installed.

The dense, non-directional fiber structure of TOPROCK® DD also reduce sound transmission. This minimizes the transmission of airborne and impact noise into the units below, improving occupant comfort.