The answer to 'roof installation sagging' is that sagging roofs are often caused by structural issues, improper installation, or age-related deterioration. Symptoms can include visible dips or depressions in the roof, cracks in the ceiling, or uneven roof slopes. Solutions may involve reinforcing the roof framing, replacing damaged roof sheathing, or in severe cases, a full roof replacement.
Roof sagging is typically not a DIY-friendly repair, as it requires extensive structural work that should be done by experienced roofing professionals. Attempting to fix a sagging roof without the proper skills and equipment can be dangerous and lead to further damage. It's best to have a qualified roofing contractor inspect the roof and provide recommendations for the most appropriate and safe solution.