The robustdetails® scheme is the alternative to pre-completion sound testing for satisfying Part E of the Building Regulations. Using the scheme avoids the uncertainties of pre-completion sound testing.
Robust Details can be used with aircrete. In the table below you will find the specific RD references that have been specifically designed for aircrete:
Attached Houses (new build)
Separating Wall Details
2 leaves of 100mm (min)
3.6N, 7.3N, 8.7N
Code for Sustainable Homes
E - WM - 6
Traditional mortar 2
Fully insulated with mineral wool (max density 40kg/m³)
Nominal 8mm render or Gyproc Soundcoat Plus (parge) coat
12.5mm plasterboard (8 kg/m²) on dabs
E - WM - 10
Thin Joint 3
E - WM - 13
Nominal 8mm render or Gyproc Soundcoat Plus parge coat
E - WM - 15
35mm Isover RD35
15mm plasterboard (or 12.5mm Gyproc WallBoard Ten) on dabs (9.8kg/m²)
(No parge coat required)
E - WM - 23
Fully insulated with
Superglass Party Wall Roll
E - WM - 24
Saint Gobain-Isover RD Party Wall Roll
E - WM - 30
Knauf Supafil Party Wall
blown glass mineral wool insulation
1 Ensure Robust Details scheme requirements are met.
2 Wall ties type ‘A’ (as per Appendix A of AD’E’ and RD Handbook).
3 Ancon HRT4 or Clan PWT4 wall ties.
Flanking Wall Details applicable to all above separating walls
100mm (min) 3.6N, 7.3N, 8.7N
12.5mm plasterboard (8 kg/m²) on dabs or 13mm plaster finishes
See Robust Details E-WM-6, E-WM-10, E-WM-13, E-WM-15, E-WM-23, E-WM-24 or E-WM-30 (pages 1 to 6) in the RD Handbook for full details (with notes) of junctions between the separating wall and external (flanking) wall, staggered external (flanking) wall, internal floor junctions, ground floor and roof. The above RD’s do not permit flue blocks to be built in to the separating wall leaves.
Flats and Apartments (new build)
(PCT for wall not required if RD’s
scheme requirements are met)
Any aircrete block
Aircrete E-WM-6, 10, 13, 15, 23, 24 or 30
Any non aircrete RD wall
(except E-WM-12, 25 or 29)
Not required 2
Aircrete E-WM- 6 1, 10 1, 13 1, 15 1,
23, 24 or 30 1
(200mm thick floor planks and ceiling CT5 required with E-FC-5)
(E-WM-12 not applicable with E-FC-5)
or Super Strength
23, 24 or 30 1
Any non aircrete RD wall except E-WM-12
Non aircrete masonry wall
Any non aircrete RD
(wall except E-WM-12)
High Strength or Super Strength
1 At least one storey of the separating wall flanking the separating floor must be built in higher strength, otherwise PCT of floor will be required.
2 Ensure RD’s scheme requirements are met.
See the RD Handbook pages 1 to 6 of the relevant Wall and Floor Robust Detail for full details (with Notes) of junctions between the separating wall and external (flanking) wall, staggered external (flanking) wall, internal floor junctions, ground floor, separating floor and roof.
13mm plaster may be substituted for the separating wall finishes detailed in the Table above. However, this will not be in accordance with the RDs and PCT will be required for the wall.For more information on Robust Details, please visit the Robust Details website http://www.robustdetails.com
MPA Masonry is part of the Mineral Products Association, the trade association for the aggregates, asphalt, cement ,concrete, dimension stone, lime, mortar and silica sand industries. www.mineralproducts.org
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