Section 3.65 of the Building Regulations (Approved Document E) states that the resilient material should meet the following two requirements:
1. A maximum dynamic stiffness (measured in accordance to BS EN 2905201:1992) of 15MN/m³
2. A minimum thickness of 5mm under the load specified in the measurement procedure of BS EN 29052-1:1992, 1.8kPa to 2.1kPa.
ISO-SCREED meets both these requirements.
In any construction height is a significant factor. This material is designed to ensure maximum performance whilst minimising height rise of the construction.