Test fit the main roof of the church to make sure it extends over the front center section of the church (between the two wings) but isn't so long that it interferes with the two peaked roofs at the front of the church. Trim it it shape if necessary. If you will be gluing a tower to the end of the church, you may need to trim the roof so that there is no overhang on the tower side.
If you will be adding a tower, glue it in place to the main church building now.
Glue the main church roof to the end peaks of the church building, keeping it free of the tower if you have added one. Set aside to dry.
