Approved Document E
Approved Document E: Resistance to the Passage of Sound
This document specifies the acoustic performance requirements of ties suitable for use in separating walls (Type A ) and external walls (Type B) of new build dwellings.
Type A ties must have a measured dynamic stiffness of <4.8MN/m3 for the specified minimum cavity, at a standard density.
All Ancon ties which cross a cavity meet the requirements of Type B.
How the dynamic stiffness of wall ties is measured
The ends of six samples of each tie are cast into 100mm square concrete blocks, the blocks are suspended, one block excited and the frequency response measured. From these tests the mean dynamic stiffness is calculated for the specific cavity and multiplied by the tie density (usually 2.5 tie/m2). The results are shown in MN/m3.
Teplo-BFR is an innovative basalt-fibre wall tie that features a plain end for resin anchoring into an existing structure and a moulded safety end for building into a new bed joint.
Nexus, the next generation of brick-faced support systems developed through a collaboration between Ibstock Kevington and Ancon, is the first of its kind to achieve British Board of Agrément (BBA) certification for both soffits and lintels.