Replacing tiles for me it's no problem ...
Every day: cover roofs and exterior walls of structures with slate, asphalt, aluminum, wood, gravel, gypsum, and related materials, using brushes, knives, punches, hammers and other tools, cut felt, shingles, and strips of flashing; and fit them into angles formed by walls, vents, and intersecting roof surfaces and nail or staple roofing paper to roofs in overlapping strips to form bases for other materials.