Tested to provide one hour of fire resistance at 600mm centre widths, Knauf Insulation can offer double the fire resistance stipulated by Building Regulations
Knauf Insulation’s rocksilk flexible slab has been tested to provide one hour of fire resistance to EN 1365 at both 400mm and 600mm centre widths within the separating floor of a loft conversion.
“Insulation is critical in providing fire resistance within the separating floor of a loft conversion, but other manufacturers have only tested their products for this application at one centre width – 400mm,” said Luke Davies, product manager at Knauf Insulation.
“Our product is the only one in the UK to also be tested to provide one hour of fire resistance within joists of 600mm centre widths. One hour is double the fire resistance stipulated by the building regulations, giving residents valuable extra time to detect the fire and escape.”
According to the manufacturer, rocksilk flexible slab is a non-combustible, rock mineral wool product with a classification of Euroclass A1 reaction to fire. It has been designed to compartmentalise the building and preserve the escape routes by resisting the passage of fire and heat.
It is also said to be suitable for use in other floor types, as well as roofs, walls and partitions built using a variety of different construction methods.
In an attempt to eliminate unintended air gaps, slabs are flexible on all four sides so friction fit to the building elements, as well as being able to adapt to imperfections in construction and knit together at the joints.
A detailed installation guide has been created to accompany the product with clear advice to installers for a range of applications and scenarios.
Rocksilk flexible slab is manufactured with ecose technology, Knauf Insulation’s bio-based binder that contains no added formaldehyde or phenol. It is made from renewable raw materials and according to the team, is 70% less energy-intensive to manufacture than traditional binders.
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