One layer of 12.5 mm fermacell® to one side, one layer of 12.5 mm fermacell® and one layer of 10 mm fermacell® to the other side., One layer of 12.5 mm fermacell® to one side, two x 12.5 mm fermacell® to the other side.
One layer of 12.5 mm fermacell® to one side, one layer of 12.5 mm fermacell® and one layer of 10 mm fermacell® to the other side., One layer of 12.5 mm fermacell® to one side, two x 12.5 mm fermacell® to the other side.
One layer of 12.5 mm fermacell® to one side, one layer of 12.5 mm fermacell® and one layer of 10 mm fermacell® to the other side., One layer of 12.5 mm fermacell® to one side, two x 12.5 mm fermacell® to the other side.