Knauf Drywall’s Gypsum Parge Coat – a key solution for Part E compliance in residential masonry separating walls – has gained further approvals that allow its use in a wider range of applications. After extensive on-site acoustic testing, Knauf Gypsum Parge Coat has achieved Robust Detail status for use on cavity separating walls of dense aggregate blocks (1,850-2,300kg/m3) and Besblock Star Performer general purpose cellular blocks. This follows earlier RD approval for its use with medium density aggregate blocks (1,350-1,600kg/m3).

The latest approvals mean that housebuilders and drylining contractors can ensure Part E compliance without pre-completion testing by using Knauf Gypsum Parge Coat on separating walls of types E-WM-3 and E-WM-5 – in addition to the common E-WM-4 type approved previously. This makes Knauf Gypsum Parge Coat suitable for use in houses, flats and all other residential buildings where masonry separating walls of these types are specified.

Knauf Gypsum Parge Coat is used in place of traditional sand-cement renders to seal masonry prior to finishing with Knauf plasterboards. As a gypsum product it is easy to mix and to apply – by hand or machine – and its fast two-hour drying time is a boost for site productivity as Knauf Wallboards can be direct bonded on the same day.

Part E of the Building Regulations requires that in new-build houses, separating walls must provide at least 45dB reduction of airborne sound on site. Robust Details provide conditions for constructions to comply with Part E, without pre-completion testing. With the new approvals, builders have three options for compliance using 100mm blocks with a 75mm cavity; each outer face is parge-coated and finished with 12.5mm Knauf Wallboard on dabs of Knauf Bonding Compound.

Gypsum Parge Coat from Knauf Drywall is available from builders merchants in 25kg bags – each covering 4.25m2 at a minimum thickness of 6mm. Further details on Gypsum Parge Coat and other Knauf Drywall solutions for Part E compliance in residential applications can be found in the Design Partner series Housing brochure, available free from 08700 613700 or

Knauf Drywall manufactures a full range of plasters, plasterboards, insulating laminates, drywall accessories, metal sections and steel building systems, for domestic and commercial applications, from factories at Sittingbourne in Kent and Immingham on Humberside.

There are currently no comments for this article.

Login to comment. slider