Exterior, Concrete Siding Material, Flat RoofLine, Stone Siding Material, House Building Type, Metal Siding Material, and Glass Siding Material Architect Joaquin Castillo blends inexpensive materials, the odd splurge, and a refined modernist sensibility to create an affordable weekend house for brothers Alfredo and Guillermo Oropeza. The facade is a juxtaposition of rough-hewn local stone, smooth concrete, glass, and steel—the material palette used throughout the structure.  How Boxy Would You Go? A Look at Modern Box Homes by Allie Weiss from An Affordable High-Design Vacation Home in Mexico