Knauf Insulation Earthwool Acoustic Party Wall Slab (17Q)

Description

Acoustic Party Wall Slab is a foil-faced semi-rigid non-combustible, glass mineral wool slab with a water repellent additive. They are 455mm wide to suit standard vertical wall tie spacings, ensuring a closed joint with adjacent slabs.

Application

Acoustic Party Wall Slab has been developed as an acoustic insulant in masonry party walls aimed at removing the need for a wet-applied parge coat. The normal internal lining of plasterboard on dabs, applied directly to the bare block face is then the internal finish.

Acoustic Party Wall Slabs are installed partially filling the cavity in the separating wall. The slabs are held in place with retaining discs in the same manner as a partially filled external cavity wall.

They must be installed with the foil facing the minimum residual 40mm cavity with the slabs tightly butted together. The junction of the party wall cavity and external wall cavity must be closed to prevent flanking sound transmission. This is usually achieved by installing DriTherm Cavity Slab or Cavity Barriers.

Normal practice is to continue the installation of the Acoustic Party Wall Slab to the full height of the separating wall up to the underside of the roof.