Water Resistance

Moisture management is important for the prevention of mould. Knauf PERMAROCK® Cement Board Indoor is manufactured using inorganic materials, meaning they are unaffected by water and are resistant to mould. Knauf PERMAROCK® Cement Board Indoor is suitable for use in wet areas such as swimming pools, saunas, and bathrooms.

Knauf PERMAROCK has strong lightweight and weather resistant solutions. The PERMAROCK Exterior Facade System is engineered for certainty and creative freedom, performing across the spectrum of projects—from demanding seaside and hospitality structures to large-scale commercial and public buildings. PERMAROCK® Residential External Cladding System is a high-performance, economical and lightweight solution for external walls especially those exposed to moisture, heavy wind loads, and harsh coastal environments

If glasswool becomes saturated it may lose some of its thermal performance but the extent of the reduction very much depends on the degree of saturation and whether the insulation has been mechanically abused whist wet. If there is no mechanical abuse whilst wet, the product will dry out in time and its thermal conductivity will remain as it was when manufactured but there may be a slight reduction in thickness.

However, if the glasswool has been subject to mechanical abuse, compression, or loading whilst wet there could be a considerable reduction in thickness which would reflect on the thermal performance once the product has been allowed to dry out.