Sunnyvale has one of the largest collections of Eichler and mid-century homes in the Bay Area, and many of them have flat or very low-slope roofs. The rest of the city is a mix of ranch homes with asphalt shingle and homes with clay or concrete tile. Titanium Roof Innovations replaces flat roofs, tile roofs and shingle roofs in Sunnyvale, and every job starts with a free estimate.