WLS 042 mineral insulation boards
Insulation boards
Plaatisolatiematerialen
Plattendämmstoffe
Mats for thermal insulation
Mattenisolatiematerialen
Mattendämmstoffe
Loose-fill and blow-in insulation materials
Stort- en inblaasisolatiematerialen
Schütt- und Einblasdämmstoffe
Speciality products
Speciale producten
Spezialprodukte
Eigenschaften
The formation of pores during manufacture results in a porosity of 95 per cent, which is responsible for its thermal insulation properties on the one hand, and gives rise to capillary action on the other. The insulation material can absorb and release moisture from the air. This improves the indoor climate and prevents the growth of mould. As a mineral-based product, the boards are resistant to ageing, non-combustible and do not mould or rot. When installing them, direct contact with groundwater should be avoided.
Mineral insulation boards are primarily used for the internal insulation of external walls and for the underside insulation of ceilings in underground car parks, cellars and passageways. Furthermore, the boards are used in above-roof and flat-roof insulation systems, for insulating double-skin masonry, cavities in walls, curtain-wall and rear-ventilated façades, as well as for screed insulation. In applications where high compressive strength is required, mineral insulation boards with a higher density and higher thermal conductivity are used. Through system suppliers, the boards are also suitable for use in external thermal insulation composite systems (ETICS).
Rohstoffe und Herstellungsverfahren
Raw materials: lime, sand, cement, gypsum, mineral aggregate, aluminium
The raw materials are mixed with water and poured into moulds. During this process, the lime is slaked by the water, generating heat. The aluminium reacts due to the prevailing alkaline environment. Hydrogen escapes, which is responsible for the formation of pores. After an initial setting, the semi-solid blocks are cut into insulation boards, which are then cured in an autoclave. This process results in the formation of calcium silicate hydrates.
Technical Specifications
Property | Unit | Parameters | ||
|---|---|---|---|---|
| Thermal conductivity λR | W/(mK) | 0.042 | 0.045 | 0.047 |
| Bulk density ρ | kg/m³ | 90–130 | 110–115 | 115 |
| Heat capacity c | J/(kgK) | 1300 | 1300 | 1300 |
| Building material class | -- | A1 | A1 | A1 |
| Water vapour diffusion resistance μ | -- | 2–7 | 3 | 3 |
| Primary energy content | kWh/m³ | 210–393 | 210–393 | 210–393 |
| Water-repellent effect | -- | no | no | no |
| Can it withstand pressure? | -- | yes | yes | yes |
*Comparative U-value: 1.0 W/(m²K)
Production offcuts can be recycled without any problems. There is as yet little or no experience regarding the disposal of used materials. Reuse may be a possibility; otherwise, the insulation material can be disposed of at a construction waste tip.
Z-23.11-1811, Z-23.11-1501, Z-33.43-878, Z-33.43-857, Z-33.43-327, Z-33.43-606, ETA-05/0093
Gesundheit und Ökologie
From an environmental perspective, one advantage of the product is that the raw materials only have to be transported over short distances. However, its manufacture is relatively energy-intensive. From a health perspective, there are no known concerns. A study into the radioactivity naturally present in mineral substances shows that it is at a safe level[i].
[i] Environmental Product Declaration EPD-XEL-2009212-D; Institute for Construction and the Environment e.V., 16 February 2009
- capillary-active
- no chemical additives
- short transport distances for raw materials
- many areas of application
- Price and thermal conductivity: average
- moderate energy consumption during manufacture