Plaster-based façade insulation board

摘要

A plaster-base façade insulation board (1) of mineral wool, the uncoated plaster-base surface of which is usable for direct application of a plaster coating (4), and the fibers of which are crimped in the course of manufacturing the board prior to curing for the formation of mineral fiber crimped boards, such that an elevated proportion of the fibers is oriented in the direction of thickness of the mineral wool web resting on the production conveyor. The mineral wool used herefor is glass wool of non-biopersistent fibers having a ratio of alkali constituents to earth alkali constituents of greater than 1. The glass wool possesses a hydrophobic finish, namely in such a way that water absorption per surface unit on the average does not exceed 1,0 kg/m<2> after 4 hours and 4.0 kg/m<2> after 28 days. <IMAGE>