Amber Flat Roofing Logo

7 Myths About Fibreglass Roofs: Debunked

Home » Roofing Blog » 7 Myths About Fibreglass Roofs: Debunked

7 Myths About Fibreglass Roofs: Debunked

Fibreglass roofing, also known as GRP (Glass Reinforced Plastic), has increased in popularity over the last few decades. This is especially the case for property owners looking for replacement flat roofs. However, the more popular fibreglass roofing becomes, the more speculation there is about it. 

With that, unfortunately, come some misconceptions about the material. Often, these myths can lead homeowners and business owners alike to overlook the true benefits of the fibreglass roofing option when compared to other solutions, such as slate, for example. 

In this article, we’re going to be debunking some of the most common fibreglass roofing myths, instead providing some advantages of choosing it as an ideal roofing material for you. So, what is fibreglass roofing, and what are the common myths about it that you should believe?

A fibreglass roof is made of a material that’s otherwise known as glass reinforced plastic (GRP). It’s made up of layers of glass fibre mat and strong liquid resin. As soon as the resin cures, it forms a seamless, solid and waterproof surface. A top coat is often applied to protect it from UV rays and to give it one more layer of protection. Some of its key features include:

  • Strength and durability
  • Waterproof and weatherproof 
  • Low maintenance
  • Modern appearance
  • Lasts for 30+ years, with the right maintenance and proper roof installation

Now that you know and understand what a fibreglass roof is and why they’re used, we’re going to be debunking some of the most common misconceptions about the material. From assuming that the material is weak and brittle to looking somewhat unattractive, here are seven myths about fibreglass roofing that you shouldn’t believe:

Myth 1: fibreglass roofs are fragile

Are fibreglass roofs fragile? Absolutely not. In fact, they’re the exact opposite of weak and fragile. Fibreglass is an exceptionally strong and durable material that’s designed to withstand a wealth of harsh weather conditions. From snow and frost to heavy rain and extreme heat, fibreglass roofing can take it all. 

Once fibreglass roof installation has been completed, it forms a seamless and solid surface that is able to resist warping, cracking and even corrosion. With the right maintenance, a fibreglass roof can last as long as 30 years, which is why many homeowners and business owners will often choose fibreglass as the ideal roofing material for them. 

Myth 2: fibreglass roofing is only suitable for small areas

Is fibreglass roofing suitable for large areas? Yes. It’s a common misconception that fibreglass roofing can only be used for small spaces, like extensions, garages or dormer windows. However, with the advancement of modern roof installation techniques, it’s now possible to reroof larger areas with fibreglass materials. In fact, it’s often used as roofing for large commercial buildings to ensure a sleek finish and waterproof results. 

Myth 3: fibreglass roofs reduce kerb appeal

Do fibreglass roofs look good? Fibreglass roofing provides a contemporary, modern look that’s difficult to achieve with slate, for example. While early fibreglass roofing material development focused more on functionality than on aesthetic appeal, the industry has come a long way since then. 

So much so, its appearance and practicality have been expertly combined to provide a roofing material that is both functional and adds kerb appeal to any commercial or domestic building. Fibreglass roofs only add to the modern look of your property, it doesn’t reduce it. This is just another reason to choose fibreglass roofing installation for your property.

Myth 4: fibreglass roofing can be installed in a DIY fashion

Can I install a fibreglass roof myself? No. Fibreglass roof installation requires experience and precision. It needs to seamlessly align so as to ensure its waterproof properties. When done improperly, fibreglass roofing can look messy, and it won’t provide you with the weather-proof properties that you will need. 

Improper fibreglass roofing installation can leave bubbles, weak spots and gaps, therefore causing leaks and letting insects into voids over time. It’s not recommended to install a fibreglass roof yourself. You should always leave fibreglass roof installation to the professionals, such as us here at Ambre Flat Roofing. 

Myth 5: fibreglass roofs are expensive

Are fibreglass roofs expensive? Fibreglass roofing is an affordable option for many homeowners and business owners. While it might look like a costly option at first glance, fibreglass roofing materials have come a long way since it was first developed. In addition, fibreglass roofs have a considerably long lifespan, meaning that they won’t need replacing as often, with the right maintenance. When looked after properly, a fibreglass roof can last as long as 30 years, so it should be seen as an investment when compared to other roofing materials, like slate, for instance.

Myth 6: fibreglass roofing cracks in cold weather

Does fibreglass roofing crack in cold weather? No. Fibreglass is exceptionally strong and durable. It can withstand an array of harsh weather conditions, including sleat, snow, frost, and even hail. The material is designed to expand and contract with the changing weather, meaning that it simply will not crack when the temperatures drop, even if it falls to freezing or below. When installed correctly, fibreglass roofing will almost always be able to withstand cold weather conditions. 

Myth 7: fibreglass roofs are difficult to repair

Can fibreglass roofs be repaired? Yes. It’s a common misbelief that fibreglass roofing is difficult to repair, with people often believing that a new roof is needed should something go wrong. This simply isn’t the case. Just like with any roof repair, fibreglass roofing is straightforward to rectify should damage occur. Choose a professional to carry out these repairs for you. They will sand down the affected area and relaminate it to restore the roof to its full integrity and appearance. You’ll never even know that a repair has taken place – it’s that seamless.

Are you looking for fibreglass roof installation or fibreglass roof repairs near you? If so, look no further than us here at Amber Flat Roofing. We have a wealth of experience and knowledge in the industry, applying our specialist skills and expertise to provide you with a fibreglass roof that will stand the test of time. We can also lay felt and rubber roofing as part of our roof installation services near you. If you would like further information, get in touch with a member of our friendly, professional team today – we’re always on hand to help you.

Contact Form

Copyright © 2025 – Amber Flat Roofing Ltd
Registered in England & Wales: 14388901