ROCKWOOL Fixrock is a light weight water repellent stone wool slab for ventilated facade systems. Upon request Fixrock can be supplied also with one side glass fleece coating in white or black colour (FB1 eq. black fleece; FW1 eq. white fleece). Like all ROCKWOOL products it protects against fire; provides acoustic comfort due to its fibrous structure; is uniquely durable against all forms of weather and is only sourced from sustainable materials.