Larnach Castle general manager Paul Phelan said the leaking historic building was undergoing restoration work.
Much of the work was being done on the roof and the northeastern and eastern sides of the building.
''There was leakage issues in the roof and we had water coming in through the building.
''Two or three of the rooms were dramatically affected by it, so obviously we need to stop it before we can do anything on the inside.
''So we've lifted the roof off.''
He said on top of that, all the masonry and pointing on the northeast and east side of the building needed to be restored.
''One of the issues we've had is, the pointing has withstood the weather conditions better than the actual rock or stone work.
''So what tends to happen is rain pools on top of the pointing and then wants to work in behind the stone work.''
It was hoped the restoration project would keep the building watertight for at least another half century.
''It shouldn't look brand new when we're finished because we're trying to make it look as authentic as possible, and make it fit in with everything else around the building.
''We're trying to make it blend in.''
He said the project was expected to cost about $250,000.
''But in saying that, that's not the potential end of the project because as we've gone through it, we've found more projects that are worthwhile to do while we're up there.
''It could cost even more,'' he said.
Although the cost of the project would be ''substantial'', he said the staff worked hard during the summer to make the money so they could spend the winter putting the funds back into the building.
It was hoped the project would be completed in mid-to-late July.
