The building continues to take shape with the installation of the precast stairs and the lift shaft and the Marshalls Priora paving has been delivered to the site ready for the development of the road.

The Finnjoists are clad in PEFC certified plywood and the cavity is filled with 220mm of Rockwool Flexi insulation. Rockwool ‘Flexi’ is a unique insulation product with a patented flexible edge along one side for framed constructions. Like all mineral wool insulation products Flexi delivers outstanding performance (Thermal conductivity (λ=0.038 W/mK)) and the unique ‘flexi’ edge offers accurate fit to all widths coupled with excellent thermal, acoustic and fire properties.
The product is easy to handle and install without gaps thus preventing unnecessary waste.

Ensuring a perfect insulation fit is essential to maintain the thermal integrity of the wall. Typical softwood timber moisture contents can range between 6% and 30%, dependant on exposure to the elements. As a rule of thumb, timber will expand 1% for every 4% of moisture content. A 100 x 47 mm timber stud can therefore expand 3 x 2 mm (each side) and then shrink back. If insulation is installed when timber has high moisture content, it can result in a potential 6 mm vertical void on each side. When the timber dries out, Rockwool Flexi will expand into this void, ensuring thermal integrity, whilst rigid insulations may leave a 6 mm gap, or even fall out.

Rockwool Flexi works in two distinct ways to reduce noise, either by impeding the transmission of sound through an element of the structure, or by absorption of sound at the surface. Noise absorption is expressed as a factor between 0 and 1.0.
The more sound that a surface absorbs, the higher its absorption coefficient.
The structure of the fibres in Rockwool Flexi slabs make them ideal for use as a sound absorber, with characteristically high coefficients over a wide frequency range.

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