Mineral wool panels combine the enclosure and insulation in a single element. They can facilitate rapid closing of the building and meeting specific fire requirements. However, account must be taken of weight, support and careful sealing of joints. When building in stages, exposed ends and consistency between successive batches must also be ensured. The panel consists of two facings and a core bonded to them. Installing the complete element can reduce the number of separate enclosure operations. Not every layer has to be installed as in a wall assembled on site. This helps to organise the schedule, especially when the priority is to close the building before further works.

The thickness of the mineral wool panel is selected after defining the wall requirements. First, the interior conditions and the function of the partition must be established. Then the thermal, fire and mechanical parameters are compared. The 60–200 mm range is not a list of interchangeable options for any use. Each variant can change the weight, fixings and finishing details. Determine the target temperature and the way the building will be used. An unheated warehouse, a constantly warm workshop and an internal partition require different assessments. Humidity and the possibility of changing the function after the extension are important. A thickness chosen only for the first stage may later limit the use of the building.