Insulation materials (Roofing)

Alucushion® FR is a multi-purpose fire retardant grade insulation material used in factories, warehouses, shopping centres, schools, offices, residential buildings and affordable housing. It is an insulation material that offers many features and benefits not found in 'traditional' insulation products. Developed in Europe and applied successfully in many countries, Alucushion® FR is a 4 mm compounded foil, consisting of a low-density polyethylene 'bubble' laminated on both sides with aluminium foil. Alternatively, Alucushion® FR can be supplied with aluminium foil on one side, and a white polyethylene coating on the other side to add a decorative dimension.

The thousands of air bubbles created during the manufacture of Alucushion® FR form a column of immobilised dry air effectively countering heat loss through convection and conduction. Add to this the highly reflective and low emissive properties of the aluminium foil, giving a 95% restriction of heat transmission by radiation, and the effectiveness of the product as a heat-transfer barrier becomes obvious.

Physical properties
Thickness 4 mm
Roll size 1 250 mm x 40 m (50m˛)
Roll mass 15 kg

Effect of fire
Alucushion® was historically the first insulation material that was evaluated in the large-scale testing facility developed for industry at the CSIR. Being forerunners in the industry, the new Alucushion® FR (Fire Retardant Grade) was one of the first insulation materials in South Africa to be tested and approved according to the new SANS 428 fire regulations as part of SANS 10400 Part T of the National Building Regulations. Alucushion® FR performed extremely well under these simulated conditions, with and without sprinkler systems.

Installation
Steel frames - laid apex to eave over purloins and under roof cladding, using plastic coated straining wires at 383 mm centres.
Timber frames - laid gable to gable under purloins/battens and stapled to top of trusses.