To determine if your roof is made of aluminum strips, you can look for the following characteristics: 1) The roof has a shiny, metallic appearance, which is typical of aluminum. 2) The strips are lightweight and flexible, making them easy to handle. 3) They are often interlocking, which is a common feature of aluminum strip roofing. 4) Check for any manufacturer's markings or labels that might indicate the material. If you're unsure, a professional roof inspector can help confirm the material by examining the roof closely or taking a small sample for testing.