The use of brownstone was very prevalent in Richardsonian Romanesque structures. This brownstone contains occasional concretions. This stone is covered with a dark coating, probably the result of pollutants. The stone blocks are rock-faced and set in courses, for the most part in alternating thicker and thinner layers. The main type of red sandstone has generally held up well, but there has been some deterioration of stone at the main entranceway and some blocks have split.
Some blocks here exhibit honeycomb weathering.
The Portage Entry Red sandstone has not held up as well. Some sandstone walkways, made of Euclid bluestone or Berea Sandstone, remain in front of the church. The 1894 baptismal font is light colored onyx marble.