With Siniat Shaftwalls up to a height up to 3m, there will be no horizontal board joints as 19mm Fire Core Board is sold in 3000mm x 600mm lengths.

Shaftwalls taller than 3m, you must introduce horizontal CH Stud noggins which are positioned with at least a 1000mm stagger between successive stud bays. The noggin will be tightly fitted between vertical studs and sat on the first board installed, the next board above will then fit tightly down on it.