27/05/2022
Linitherm PAL HW-M has all the same qualities as PAL HW, but with the added benefit of factory bonded, A1 fire rated mineral wool to the underside. This extra layer also contributes further by deadening impact driven noise.
Linitherm PAL HW-M boards interlock on all four sides preventing vapour escape and deflection at all board joints. Being interlocked, external load is spread across the adjoining boards, not per individual board as with standard straight cut PIR insulation. No crushing under foot or undulation being read through the thin outer skin.
2 X 100% aluminium vapour barriers (not paper based foils), one on the cold side, one on the warm, locking out the dominant external temperature whilst locking in the desired temperature with a high performance PIR core. PAL HW-M has the addition of factory bonded A1 Fire Rated mineral wool to its underside providing extra protection against fire and sound attenuation.
Being a warm roof and facade product, Linitherm PAL HW-M can be installed directly to the substrate (timber, metal, concrete, blockwork) with no requirement for a vented void between the insulation and the structure, or the outer skin and the insulation board. (contact local building control for your project).
As both facade and roofing are non vented using Linitherm PAL HW-M, there's minimal opportunity for fire to obtain oxygen within the system. The void between a vented roof or facade and its insulation is designed like a chimney effect to draw air from the bottom of cladding, or eaves of roof, to the top of the cladding, or ridge of roof in order to prevent condensation on the underside of the outer skin. However, in case of fire, this feed of oxygen allows fire to quickly spread or leap floors. The more intense a fire becomes, the more air will be drawn into the void pushing the fire upwards in a confined and shielded space. This can create a firestorm within the void where exposed breather membrane, paper based foil covered PIR, moreso PUR and EPS along with other flammables are present. Many outer skin roof and facade materials no longer require ventilation and can be specified compact and non vented with Linitherm PAL HW-M.
Contact us for more info and u value calcs for your project
Learn more about superior Linitherm insulation materials via www.explodedview.co.uk or www.linitherm.de.
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