The name Simi Valley CA probably comes from the fact that one of the Chumash Indian villages that once stood in the area was called Shimiji. The other village was called Ta’apu and this name was incorporated into the name of Tapo Street. Simi Valley CA is one of the largest cities in Ventura County, featuring numerous golf courses as well as more kid-friendly attractions like pools, skateparks, and laser tag. If you own a home in Simi Valley CA, Progressive Insulation & Windows can provide the upgrades you need to keep your property energy efficient, comfortable, and attractive. We carry a variety of windows, doors, and insulation products, and our customer service can’t be beat. We will be happy to help you create a cost-effective plan for making the improvements you want. All of our installers are Progressive employees (not subcontractors) and we guarantee the quality of their work 100 percent.