Mineral wool is a type of inorganic and non-metallic product that is most commonly manufactured from a controlled combination of raw materials, which mainly comprises either silica or stone which are heated to a very high temperature until it is molten. The molten stone r glass then gets spun and formed into a fibrous, flexible mat for further processing into the completed products.
The exceptional thermal, acoustic, fire properties of the mineral wool is derived from the mat of fibers that prevent the movement of air, and also from the mineral wool’s inert chemical composition.
Mineral wool is quite a versatile type of material, and it can also be manufactured to many different densities in order to give its varying properties, these properties are formed in many different shapes and also faced with a range of sheet materials. The range of different products can include loose granular material that is most commonly used for blown insulation of cavity walls, wall slabs, rolls for your loft insulation through to pre-formed and faced pipe sections, acoustic panels and ceiling tiles.
But how does it work?
When it comes to the thermal performance of mineral wool, it is mostly because of prevention of convection by the entrapment of air in the material’s open-cell, wooly matrix. Conduction gets reduced because there is not much solid material to provide pathways and the static air that is trapped has a low thermal conductivity. The heat transfer will also be reduced as the material acts as a physical barrier to the radiative process.
The way that stone and glass mineral wool insulates, is by holding and trapping air still. It does not reply on injected gas which could leak and result in a deterioration in the thermal performance.
Porous materials like mineral wool work to reduce and control noise by allowing any air movement into the fabric of the material being used. Fluctuations of air molecules, which also form the sound waves, are able to move into the body of the mineral wool, where friction between the material’s narrow airways and the air particles cause sound energy to be dissipated as heat.
At Insulpro, we offer a wide range of mineral wool. All of our products are sources in order to comply with the stringent specifications required by leading Consulting Engineers. For more information on our products and services, visit our website on www.insulpro.co.za.