I am doing a Loft conversion. the new loft floor is 7x3 joists set 3 ins above the existing ceiling, which is underlined with 9.5mm plasterboard.
The fire retardent mat between the joists will be 100mm rockwool flexi.
As the new joists are above the old ceiling does the mat sit directley on the plasterboard with wire mesh if so what happens to the 3ins gap under the new joists or can the mat be fitted between the new joists
Best Regards
The fire retardent mat between the joists will be 100mm rockwool flexi.
As the new joists are above the old ceiling does the mat sit directley on the plasterboard with wire mesh if so what happens to the 3ins gap under the new joists or can the mat be fitted between the new joists
Best Regards