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months
This plasterboard has been designed for rooms where relative humidity is above 70%, but below 85% for less than 12 hours per day. Its long edge is flattened and covered with paper, and the short edge is cut in a straight line. The core contains a water-repellent additive (paraffin or silicone). Designed for use in wall and ceiling linings, partition and covering walls, suspended ceilings and lofts.