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Everything You Need to Know About When to Replace a Flat Roof

Updated: Apr 3

a damaged old flat roof which needs for replacement

This Business Owner Knew it Was Time for a New Roof.

Looking after a roof will help it last longer, and some materials are incredibly durable; however, no roof lasts forever, so you'll need to replace yours eventually. If you have a flat roof, you need to know what signs to look for to figure out when it's getting to the end of its life.

In this guide, we'll provide information you will need to know about when it's time to replace your commercial or residential flat roof. Keep reading for more.

What is a Flat Roof?

There are various types of flat roof. They can be made from different materials such as EPDM PVC, and TPO and have a membrane over the top along with a felt base (BUR and MODBIT). The membrane acts as a waterproof barrier to protect your building. A flat roof offers these advantages:


  • Energy efficient

  • Weather resistant

  • Multiple Installation choices

  • Ease of maintenance

  • Easy to access

  • Multiple usess

People often use flat roofs for things like pools, communal areas, patio gardens, decks and more.

Signs That You Need a Roof Replacement Flat

Water Pooling

One of the downsides to flat roofs is that they're more prone to water pooling. A quality roof is designed to drain water away, but after some time, water might start to pool excessively. This is a sign of potential problems, and it can lead to major issues if you leave it unattended.


Leaks are another issue to be aware of. They can be difficult to spot in the early stages, so by the time you notice a leak it may have caused a lot of damage. With a flat roof, leaks are often the result of the membrane separating from the flashings or damage to the membrane.

Rips or Tears

A more noticeable issue can be large rips or tears. If the membrane is damaged, water will get through, leading to further problems. A repair job may be enough for a small amount of damage, but for many large tears, you'll be better off with a full roof replacement.


Cracks can let water in. These can be quite thin, making them difficult to spot. A professional roofer will be able to locate and deal with these. If these cracks not fixable, it may be better to replace the roof,


Age is another factor, and it's unavoidable - even with regular maintenance. Every roof degrades with time, so if you know yours is getting old, you may want to look at replacing your roof.

For a more detailed examination of signs you may need a new roof, follow this link: Roof Replacement.

Replacing Your Flat Roof in Cambridge

At some point, a roof replacement will be necessary. Make sure you go with a reliable roofing company so that you know your new flat roof will be built to last.

The team at Grand Valley Roofing & Coatings Inc. has over 35 years of experience in installing, repairing, and maintaining both commercial and residential flat roofs in Cambridge. Contact us today to get your free estimate.

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