More than 80% of the existing hospital site is made of Raac, with more than 50,000 planks used in the walls, ceilings and floors.
This year, the budget to carry out the necessary work to keep the buildings safe is almost £25m.
Stuart Hosking-Durn, the director of operations at Airedale Hospital, said the hospital had “reached the end of its life’.
“We’re doing what we can to make it safe, so we are remediating the risk as opposed to eliminating the risk, but that’s on the journey to a new hospital.
“All roads now lead to a new hospital for Airedale,” he said.
Airedale Hospital is one of 16 NHS organisations in the first wave of the New Hospital Programme, external.
It is one of the seven hospitals which need completely replacing due to the scale of Raac in the current buildings.