E-FC-4

System Summary

Robust Detail E-FC-4 is an acoustic solution for precast plank floors. This system exceeds the requirements of Approved Document Part E and when registered with Robust Details Ltd removes the requirement for on-site sound testing.

Benefits

  • Exceeds Building Regulation requirements.
  • No need for sound testing if registered with Robust Details Ltd.
  • System uses Isorubber Base to reduce noise transfer, this is a tough, resilient acoustic mat that can withstand the rigours of the screeding process.
  • Purpose made Isoedge strip is used around the screed perimeter to eliminate flanking sound transfer.
  • No long term / short term deformation of acoustic layer.
  • Suitable for use with Under Floor Heating
  • Tried and tested solution which has been widely used since 2004.

Components & Specifications

Thermal Performance

Acoustic Performance:

As a Robust Detail the E-FC-4 system must consistently achieve a site test mean average:
Airborne Sound ≥ 50db (Dntw + Ctr)
Impact Sound ≤ 57db(Lntw)
This exceeds the Building Regulation (Approved Document Part E) requirements by 5dB in both cases.

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Find out more about this system, read an in depth report, and see our carefully curated instructions on how to get the best results when installing your solution.



About System

The ever-popular E-FC-4 system was the first ever proprietary Robust Detail for concrete floors and has been widely used since its approval in 2004. It provides high performance and excellent design flexibility, being compatible with all masonry external flanking wall types. This makes it the natural choice for under screed Approved Document Part E compliance.

The E-FC-4 system consists of 6mm Isorubber Base fitted below a minimum 65mm sand & cement or minimum 40mm proprietary screed with Isoedge 6/260 separating the screed from the wall. The structural floor must be a minimum 150mm precast plank with a minimum mass of 300Kg/m2 per unit area. The joints of the Isorubber Base are lapped by 50mm and taped using Isorubber Jointing Tape.

This system can be used with all masonry external flanking wall constructions, including aircrete blocks (450 – 800Kg/m3, 1350 – 1600Kg/m3 & 1850 – 2300Kg/m3).

A metal frame ceiling with a minimum void of 100mm or an Isosonic Ceiling is also required. Both ceiling details are under drawn with a layer of gypsum based board (minimum 8Kg/m2).

The extensive site testing carried out for Robust Detail classification and the subsequent monitoring tests show that the E-FC-4 system can achieve 3 Code for Sustainable Homes Credits, subject to pre-completion testing.

As part of the E-FC-4 registration Thermal Economics provide site training to Site Managers and Screeders by experienced industry professionals who will instruct on installation procedures and answer any questions regarding your specific project.

The E-FC-4 system can also be, and is frequently, used in non Robust Detail specifications, subject to pre-completion testing.

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