Mineral Wool Insulation

About

What is mineral wool insulation? Mineral wool is a category of insulation produced by heating natural and recycled mineral materials to extreme temperatures and spinning the molten mass into fine, fibrous strands. These fibres are then compressed and formed into finished products including slabs, rolls, boards, batts and pipe sections. The raw materials vary by product type: stone wool is derived from volcanic basalt rock, while glass wool is produced from silica or recycled glass cullet. Both processes result in a robust, non-combustible insulation material that performs consistently across thermal, acoustic and fire-resistance requirements. Mineral wool has been a staple of UK construction for decades and remains one of the most widely specified insulation materials on the market. Its versatility across applications and sizes such as 100mm and 200mm , combined with a strong fire classification and genuine acoustic credentials, makes it a practical choice for residential, commercial and industrial builds alike. Stone wool and glass wool insulation The two principal types of mineral wool differ in their raw material composition and, as a result, in certain performance characteristics. Stone wool insulation, sometimes referred to as rock wool, is manufactured from volcanic basalt and is capable of withstanding fire temperatures in excess of 1,000°C without structural failure, carrying a Euroclass A1 or A2-s1,d0 non-combustible fire classification under EN 13501-1. It is the preferred choice wherever fire compartmentation, party wall compliance or protection of structural elements is required. Rockwool is the leading stone wool manufacturer, offering a broad range of slabs and rolls suited to walls, floors and roofs. Glass wool insulation is produced from silica or recycled glass and typically achieves slightly lower lambda values, making it a highly effective thermal performer in loft and partition applications. Knauf and Superglass manufacture the leading glass mine