Robust Details

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)

Robust

Detail

 

Separating Wall Details

2 leaves of 100mm (min)

3.6N, 7.3N, 8.7N

 

Credit

Entitlement 1

Mortar joints

Cavity

Finishes

Code for Sustainable Homes

EcoHomes

Width

Insulation

E - WM - 6

Traditional mortar 2

75mm

minimum

Clear cavity

OR

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

1

3

E - WM - 10

Thin Joint 3

75mm

minimum

Clear cavity

OR

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

-

2

 

E - WM - 13

Thin Joint

 

(Untied cavity)

75mm

minimum

Clear cavity

OR

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

 3

4

E - WM - 15

Traditional mortar 2

75mm

minimum

35mm Isover RD35

15mm plasterboard (or 12.5mm Gyproc WallBoard Ten) on dabs (9.8kg/m²)

 

(No parge coat required)

1

3

E - WM - 23

Traditional mortar 2

OR

Thin Joint 3

100mm

minimum

Fully insulated with

Superglass Party Wall Roll

12.5mm plasterboard (8 kg/m²) on dabs

 

(No parge coat required)

 3

4

E - WM - 24

Traditional mortar 2

OR

Thin Joint 3

100mm

minimum

Fully insulated with

Saint Gobain-Isover RD Party Wall Roll

12.5mm plasterboard (8 kg/m²) on dabs

 

(No parge coat required)

 3

4

E - WM - 30

Traditional mortar 2

OR

Thin Joint 3

100mm

minimum

Fully insulated with

Knauf Supafil Party Wall

blown glass mineral wool insulation

12.5mm plasterboard (8 kg/m²) on dabs

 

(No parge coat required)

 3

4

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

Construction details

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)

Robust

Detail

Floor

Flanking Leaf

(100mm minimum)

12.5mm plasterboard (8 kg/m²) on dabs or 13mm plaster finishes

Separating Wall

(PCT for wall not required if RD’s

scheme requirements are met)

Floor

PCT required?

E-FC- 1,

E-FC- 6,

E-FC- 7,

E-FC- 11

or

E-FC- 15

Any aircrete block

Aircrete E-WM-6, 10, 13, 15, 23, 24 or 30

Yes 3

Any non aircrete RD wall

Yes 3

E-FC- 12,

E-FC- 13,

E-FC- 14

or

E-FC- 17

Any aircrete block

Aircrete E-WM-6, 10, 13, 15, 23, 24 or 30

Yes 3

Any non aircrete RD wall

(except E-WM-12, 25 or 29)

Not required 2

E-FC- 4

or

E-FC- 5

Any aircrete block

Aircrete E-WM- 6 1, 10 1, 13 1, 15 1,

 23, 24 or 30 1

Not required 2

 

(200mm thick floor planks and ceiling CT5 required with E-FC-5)

Any non aircrete RD wall

(E-WM-12 not applicable with E-FC-5)

E-FC- 8

or

E-FC- 9

Aircrete Standard,

High Strength

or Super Strength

Aircrete E-WM- 6 1, 10 1, 13 1, 15 1,

23, 24 or 30 1

Not required 2

Any non aircrete RD wall except E-WM-12

E-FC- 10

Non aircrete masonry wall

Aircrete E-WM- 6 1, 10 1, 13 1, 15 1,

 23, 24 or 30 1

Not required 2

Any aircrete block

Any non aircrete RD

(wall except E-WM-12)

Yes 3

E-FC- 16

Any aircrete block

Aircrete E-WM-6, 10, 13, 15, 23, 24 or 30

Yes 3

Aircrete Standard,

High Strength or Super Strength

Any non aircrete RD wall

(except E-WM-12, 25 or 29)

Not required 2

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.

 

Construction details

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.

Pre-completion testing (PCT) is NOT required for any of the above solutions.

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