Rockwool and multi layer Gyproc questions
Posted: Mon Aug 22, 2011 4:17 pm
So I have nearly finished the outside construction of my oak feather edge clad self contained studio and am now starting to plan the inside.
I would like some comments/suggestions on how I will construct the inside layers:
The roof has 125mm joists and 100mm stud walls.
I will use 75mm Rockwool RWA45 for the roof which is 40 degrees double pitched leaving an air gap of 50mm to the outside roof layer. The inside ceiling is approx 4.1m long and each pitch is about 2.4M deep including an external overhang; the actual pitch span to the wall plate from the ridge board is 1.9m.
I intend to use a vapour barrier to hold the RWA45 in place; should I also use a mesh top stop the RWA settling or will the VB be sufficient to do that? I am installing a combo A/C unit for heat/cooling which also provides fresh air ventilation.
For the ceilings I will use a resilient bar at 250mm spacing.
In the walls, I will use 100mm RWA45; vapour barrier and resilient bar (RC1)spaced 400mm.
The walls and roof will all have 19mm Gyproc plank; 12.5mm Acoustic board and a final layer of 15mm acoustic board. I intend to use Green Glue in between each layer and screw each layer to the RC1 taking care not to short circuit the Gyproc layers to the stud walling.
At the corners and Gyproc joins I will use acoustic mastic.
Have I missed anything?
I would like some comments/suggestions on how I will construct the inside layers:
The roof has 125mm joists and 100mm stud walls.
I will use 75mm Rockwool RWA45 for the roof which is 40 degrees double pitched leaving an air gap of 50mm to the outside roof layer. The inside ceiling is approx 4.1m long and each pitch is about 2.4M deep including an external overhang; the actual pitch span to the wall plate from the ridge board is 1.9m.
I intend to use a vapour barrier to hold the RWA45 in place; should I also use a mesh top stop the RWA settling or will the VB be sufficient to do that? I am installing a combo A/C unit for heat/cooling which also provides fresh air ventilation.
For the ceilings I will use a resilient bar at 250mm spacing.
In the walls, I will use 100mm RWA45; vapour barrier and resilient bar (RC1)spaced 400mm.
The walls and roof will all have 19mm Gyproc plank; 12.5mm Acoustic board and a final layer of 15mm acoustic board. I intend to use Green Glue in between each layer and screw each layer to the RC1 taking care not to short circuit the Gyproc layers to the stud walling.
At the corners and Gyproc joins I will use acoustic mastic.
Have I missed anything?