Wolf Systems has joined forces with insulation specialist Thermal Economics to develop a low-cost method of constructing Part E-compliant suspended timber floors.

The design, incorporating a layer of Thermal Economics’ Isorubber TF insulating material, is being developed as an alternative to Robust Detail E-FT3 for structural timber separating floors using metal-web joists.

The proposed Robust Detail, using Wolf’s easi-joist metal-web joists, is designed to be more economical and offer more reduction in sound transfer between dwellings than the existing detail.

The new IsoWolf system uses a 6mm layer of Isorubber (a sound-absorbing rubber product) to separate the OSB decking layer from the plasterboard intermediate layer. The Isorubber replaces the 75x45mm softwood timber battens which feature in E-FT3.

“This not only produces a shallower floor structure, but also saves a great deal of time in construction,” said Wolf Systems sales and marketing director Karl Foster.

Robust Details were introduced with the last revision of Part E to allow designers and builders to meet stringent noise requirements required without the need for every floor to be tested post-completion.

IsoWolf has already been installed and tested on 24 plots across three different construction sites.