Do you know what this looks like? The chapel on an army base, of the same period. My father and maternal grandfather spent time in the army so I've seen a lot of pictures. I wouldn't be surprised if the building were prefabricated. The fact that it was meant to be temporary backs up the possibility.
I have the same suspicion about the school, , built at the same time but frequently expanded, due to expanding enrollment. It has that same military base look to it.
The school was replaced, with a brick building, in 1955, and the church in 1968-1969.
Photos courtesy of Sean Lyons.