Roxul On Roof

The insulation planes with the roof overhang on the left.
Roxul on roof. Rockwool multifix is a mineral fiberglass faced stone wool product that can be installed under many single ply membranes. Single ply roof insulation. Made in canada by roxul comfortboard is one product in a line of stone wool products that combine the power of rock with the characteristics of insulation wool. The walls are covered in two layers of 2 in thick rockwool.
The brief answer is that you can substitute semi rigid mineral wool panels for rigid foam in any roof assembly that requires rigid foam. Single ply roof systems can provide an easy to install seamless roof assembly. A few washer nails hold the comfortboard in place. An underlayment will be installed over the insulation and overhang and then the metal roof is installed directly on top of the underlayment.