This activity is about installing stone wool mineral fibre components or infills to fill construction joints and profiles (excluding cavity barriers) and includes loose fill, slabs, strips, trapezoidal and dovetail infills. This includes checking information relating to installation, adopting safe, healthy and environmentally responsible working practices, using materials, components, tools & equipment, and preparing and installing suitable products. The activity could be carried out during building construction, or during repenetration of compartments during installation of additional services or maintenance activities.