Although a sagging roof is not necessarily a serious problem, it can be both a safety hazard and an annoyance to the people living in the home. In this article, you will learn about the most common causes of a sagging roof and how to fix this issue.

What Is a Sagging Roof?

A sagging roof is a term that refers to a condition when the ridge of a roof is sloped downward. The steepness of the slope can vary and depends on many factors. In some cases, it might be a sign of serious damage to the roof, such as leaks, and it can lead to other damage to the house, such as interior water damage.

What Are the Most Common Causes of a Sagging Roof?

The most common causes of a sagging roof are the poor condition of the roof supports, such as the rafters, and the damage to the roof’s outer covering, such as shingles.

A sagging roof has also been known to be caused by:

  • Neglecting a leaking roof
  • The excessive load on the roof
  • A large amount of snow accumulating on the roof

In some cases, the sagging roof is caused by the improper building of the house, as it can make it vulnerable to water penetration. In addition, the sagging roof can also be caused by:

  • The house settling
  • The improper installation of the roof
  • Issues with roof framing

How Is a Sagging Roof Fixed?

Fixing a sagging roof is not a complex task. You can fix the problem by repairing or replacing the sagging parts. There are many companies that offer these services, and you can call them or ask your local contractor for their advice.

To fix the sagging roof, the first thing that you should do is to make sure that the ridge is adequately supported. If it is, then you need to remove the snow off the roof by using a ladder and a snow rake.

You need to fix the problem right away. However, this is not always the case. If the situation is not too severe, you can just replace the damaged shingles.

Additionally, if the sagging is only caused by a poor building of the roof, you can just replace the roof. However, if a leaking roof causes the sagging, you need to repair the roof to prevent water damage to the house’s interior.

Another way to fix a sagging roof is by digging a trench around the base of the house and covering the trench with a layer of gravel. You also can install a drainage system under the outer edges of the roof to prevent water from accumulating there.

How Do You Prevent a Sagging Roof?

To prevent a sagging roof, you need to ensure that the top is well supported and that the roof is installed correctly. You also need to install a roof venting system to allow moisture to escape and prevent moisture buildup on the roof.

To prevent a sagging roof, you also need to do the following:

  • Cut the grass around the house
  • Water the lawn in an even way
  • Do not use the roof as a storage place
  • Remove the snow from the roof
  • Do not store heavy items on the roof
  • Call a roofing contractor for a sagging roof inspection


A sagging roof can be an expensive problem, so you need to fix the problem right away. However, you should not just rush to fix the problem without investigating the cause of the problem. If the problem is due to serious damage to the roof, you should call a professional contractor to fix the problem.

Do you need the help of San Diego roofers? Turn to Pioneer Roofing Company. We are a family-owned and operated business known as one of the most trusted roofing companies in the area. Get a quote today.