Dense fibre matting (DFM) Acoustic mineral wool
22% of each slab made from recycled materials
Zero ODP and zero GWP
FIRE-SAFE ACOUSTIC MINERAL WOOL
is particularly useful as a sound absorbing infill for the reduction of airborne noise in partition walls, between
flooring joists and suspended ceilings. AMW consists mainly of silicon-oxide together with a number of other metallic oxides.
Supplied as standard in three density grades:
Our 60kg/m³ is a performance acoustic grade version. This offers the best acoustic absorption due to it's specific density (as shown on the graph below).
60kg AMW, when used in a standard studwall, can increase the sound insulation performance by up to 6dB.
If you want to upgrade a ceiling to 1 hour fire resistance without adding any extra plasterboard below then you can use rabbit wire mesh to hold the mineral wool between the joists
to meet this requirement. The combination of the secured mineral wool sitting on the wire mesh, and the existing ceiling, is usually accepted by Building Control as
being in compliance with the required fire resistance of a separating floor between flats. Usually the material is friction fitted tightly between the joists so you won't need
any if working from above. However, it is sometimes useful to use it if working from below to prevent the material dropping back down before the plasterboard and bars are fitted.
Dense Fibre Matting (DFM)
Slabs manufactured to a higher density than 60kg/m³ are often referred to as Dense Fibre Matting or DFM. They can provide slightly improved acoustic control
and come in 100kg/m³ and 140kg/m³ densities. This product costs approx. twice that of our 60kg version and should only really be considered for
specialist applications as you don't get twice the acoustic performance for double the cost !