The answer to 'why is my metal roof cracked' is that metal roofs can crack due to a variety of reasons, including thermal expansion and contraction, improper installation, or corrosion. Metal roofs are susceptible to cracking over time as the metal expands and contracts with changes in temperature. This can cause the metal to fatigue and eventually crack, especially at seams or joints. Improper installation, such as not securing the panels tightly enough, can also lead to cracking. Additionally, corrosion from exposure to the elements can weaken the metal and cause it to crack.
If you notice cracks in your metal roof, it's important to address the issue promptly to prevent further damage. Smaller cracks may be able to be repaired with sealants or patches, but more extensive damage may require replacing the affected panels or the entire roof. In most cases, it's best to call a professional roofing contractor to assess the issue and recommend the best course of action.