The answer to 'roof installation sagging' is that roof sagging is typically caused by inadequate roof framing, excessive weight, or foundation issues. Symptoms include visible dips or depressions in the roof, cracks in the walls or ceilings, and doors/windows that no longer close properly. Solutions may involve reinforcing the roof structure, replacing damaged components, or addressing underlying foundation problems.
If the sagging is minor and isolated, you may be able to fix it yourself by adding extra support beams or replacing damaged roof framing. However, for more significant or widespread sagging, it's best to call in a professional roofing contractor to properly assess the issue and make the necessary repairs. Trying to fix major roof sagging on your own can be dangerous and may end up causing further damage.