Can I overlay the ceiling with a mineral wool blanket to improve the ceilings fire rating?
In general any overlay that is added directly to the back of an Armstrong suspended ceiling to try to increase it’s fire, thermal or acoustic performance, and which has not been successfully tested, or assessed (by a recognised expert), in conjunction with the ceiling, could have an adverse effect on the structural fire protection and fire reaction properties of the ceiling system. You should not undertake the installation of any overlay for this purpose without speaking to the relevant building control and/or fire authority and obtaining approval.
