New builds that have been constructed under the Robust Details Scheme do not have to undertake pre-completion sound insulation testing in order to satisfy Part E of the Building Regulations.
A robust detail is a separating wall or floor construction that has been registered, approved and assessed by Robust Details Ltd. (RDL). Full details are to be found in the RDL Handbook and each plot needs to be formally registered with RDL, who will carry out on-site inspections during the build process to check that the plots are complying with the standards of the scheme.