8 Signs Your Flat Roof Needs to Be Replaced

Flat roofs are more likely to fail and leak than sloped roofs, but how do you know when your flat roof fails? Let’s look at the eight most common signs your flat roof needs to be replaced so you can identify minor issues before they turn into major property damage and headaches.

Why a Damaged Flat Roof Is Dangerous

It’s critical to take care of signs of damage on any roof, but immediate repairs are even more crucial for flat roof issues. Not only are flat roofs more likely to leak, but problems like pooling water can cause structural damage if you don’t address the issue right away, which will cost more to repair and put everyone in the building at risk of personal injury. Hire a flat roof company near you immediately if you suspect you have a problem.

Signs Your Flat Roof Needs to Be Replaced

There are a few key things to check inside your home and on the roof itself that can help you identify when it’s time to replace your roof.

1. Water Spots Inside

The most obvious sign that your flat roof needs to be replaced is evidence of roof leaks inside. If you notice water spots on your ceilings on the upper floor, this is a good indication that you have an issue. Hire a roofer immediately to see if a full replacement or a repair is a better option.

2. Pooling Water

If you can safely access your roof, inspect it after a rainstorm to look for pooling water. Puddles could mean your roof is improperly sloped, while heavy accumulation could mean your roof drains are failing. Both issues could require roof replacement.

3. Visible Damage or Tears

Check your roof annually and after extreme weather to look for visible damage to the roof membrane. Look for tears and cracking, which can indicate your flat roof is failing.

4. Issues With the Flashing

Look at the seams around your roof flashing for signs of separation or damage. Problems with this part of your flat roof could just require repairs, but major damage may necessitate a full replacement.

5. Dark Spots On the Roof Membrane

Inspect your roof after major rainfall to see how it dries. It’s normal for some spots to remain wet for up to 24 hours if the weather is cloudy, but persistent dark spots likely mean the water has penetrated the membrane and will soon leak inside your building.

6. Blistering or Loose Fasteners

Blisters or bubbles on your flat roof mean that the adhesive holding it down has failed in that area, and repairs or a replacement will be necessary. You can also check for fasteners that appear loose if your membrane is mechanically fastened.

7. Flapping Noises

Hearing flapping noises from above your home during intense winds? This could mean a portion of your roofing membrane or a piece of flashing has come loose. This issue very often leads to leaks that can cause expensive water damage.

8. It’s Reaching Its Useful Lifespan

Flat roofs last for between 10 and 30 years, depending on the type of flat roof you have. If you know your roof is reaching the end of its life, replacing it before it gives you problems can save you money in the long run.

How to Know You Need to Hire a Pro for Flat Roof Replacement

If you suspect your flat roof is damaged but aren’t sure, schedule a roof inspection. Your inspector can tell you if you need a full replacement or if a repair is a potential option. However, being proactive about roof repairs is the best way to avoid expensive damage, so if you know there’s an issue or you know your roof is nearing the end of its life, hire a professional to replace your roof preemptively.

Can I DIY Flat Roof Replacement?

Flat roofs require specialized equipment to repair, so you should avoid trying to DIY the work in almost all cases. Even if you have the necessary equipment, flat roofs have a high risk of leaking, so any mistakes can cost you more money down the road. Always hire a professional to repair or replace a flat roof for the best results and peace of mind.

How to Prevent Flat Roof Damage

Scheduling annual roof inspections is the best way to prevent damage. An experienced inspector can use experience and technology to scan your roof for early signs of failure and point out areas that need repair and issues that suggest a full replacement is a better option.

You can also reseal your flat roof every two to five years to avoid damage. Resealing will help maintain the waterproof barrier over your home and will also prevent damage from UV radiation that can lead to leaks and more severe issues over time.

Finally, make sure to keep your roof drains clear. Clogged drains will cause water to collect on your roof, increasing the risk of leaks and structural damage. Clean your roof drains at least once annually and more often if you have heavy tree coverage in your area.

How Much Does It Cost to Repair or Replace a Flat Roof?

Replacing a flat roof costs an average of $7,400, and most homeowners pay between $3,300 and $11,500, depending on the type of flat roof and the size of the roof. If it’s a viable option, flat roof repair costs an average of just $400. It’s a more affordable route to go, but full replacement is a better option if you have ongoing problems or know your roof is nearing the end of its useful life.