A – Timber stud partition
1 layer of 10mm sound rated plasterboard each side of 90mm timber studs
Fibreglass in cavity
– – – – Predicted Rw 40
—— Measured Rw 42
B – Steel Stud Partition
2 layers of 13mm type X plasterboard each side of 90mm timber studs.
Blanket in cavity.
– – – – Predicted Rw 42
—— Measured Rw 43
C – Lined Brickwork
Clay brick (90mm thick) with 1 layer of 16mm plasterboard fixed to acoustic clip and 25mm fibreglass blanket in cavity.
– – – – Predicted Rw 49
—— Measured Rw 51
D – Twin framed wall
1 layer of 16mm fire rated plasterboard each side of separate 90mm studs. Cavity depth of 200mm. 90mm fibreglass blanket in cavity (16kg/m3).
– – – – Predicted Rw 57
—— Measured Rw 59
E – Timber floor & ceiling
20mm Particleboard flooring on 300mm timber joists with 2 layers of 16mm Fire rated plasterboard hung on a light steel grid underneath, with fibreglass blanket in the joist cavity
F – Concrete floor & ceiling
Composite Steel floor (Hibond) 120mm thick with suspended light steel grid with 2 layers of 13mm fire rated plasterboard. 75mm fibreglass blanket in the cavity.
– – – – Predicted Rw 57
—— Measured Rw 59
G – Block wall & linings
190mm concrete block lined both sides with 16mm fire rated gypsum board fixed to 75mm steel Z furring channels. No sound absorber in the cavity
– – – – Predicted Rw 59
—— Measured Rw 60
H – Glazing
5mm monolithic glass with 16mm airgap and 8.8mm Laminated glass
– – – – Predicted Rw 39
—— Measured Rw 40
