The answer to 'why is my metal roof missing shingles' is that metal roofs can sometimes lose shingles or fasteners over time due to weather exposure, improper installation, or underlying structural issues. This can cause leaks, damage, and safety hazards if not addressed promptly.
Some common causes include high winds, hail, heavy snow or ice buildup, and general wear and tear on the fasteners and sealants over many years. Poorly installed metal roofing that doesn't have the proper underlayment, ventilation, or fastener patterns can also lead to shingles coming loose. Underlying structural problems like rotting wood or sagging trusses can also contribute to missing shingles.