A sagging roof is one of the most serious roofing issues you can face. When your roof starts to sag, there's a risk that it can collapse at any moment. This won't just cause serious damage to your roof; it can also be a danger to anyone in the building at that time.
When you notice your roof is sagging, it's important that you move as quickly as possible to ensure the problem doesn't become worse. The longer it takes you to fix a sagging roof, the more expensive the repairs are likely to be.
Identify the Cause of the Problem
Roof sagging can be caused by a number of things including poor implementation of the roof design, water damage, weight of snow and ice, and more. The solution for the sagging roof will depend on the cause of the problem.
If, for example, you have weakened rafters, the problem can be corrected by jacking them back into position and strengthening them with an angle iron. However, the problem can also be caused by two rafters pulling apart, especially if the rafters were joined using a butt joint instead of a lap joint. This problem will require a different solution.
Identify Additional Problems
A sagging roof might be relatively simple to fix. However, if there are additional problems that have contributed to the sagging or happened as a result, fixing the issue might be more difficult. Therefore, it's important to check for issues such as rotting of wood, cracks in the joists, beams or rafters, and any other issue that may point towards a very serious problem.
This is also a good time to assess the extent of the problem. This can only be done from underneath the roof, i.e. in the attic. If weakened rafters are the issue, you'll need to find out how many rafters are affected and also the location of the leaks.
Leave it to the Professionals
There are plenty of roofing problems that a homeowner will be able to handle on their own. However, unless you have a lot of experience with roofing work, this is a job you'll definitely want to leave to a professional re-roofing services contractor.
Sagging roofs point to a problem with the structures holding up your roof. The consequences of not fixing this issue properly will be very serious. Additionally, corrective measures such as jacking up rafters require special equipment and must also be done carefully. If the rafters are jacked up too fast, the wood may crack.