Disadvantages of Fibreglass Roofing

by | Oct 18, 2023 | Loft Conversion | 0 comments

Beyond Aesthetics and Durability: The Disadvantages of Fibrerglass Roofing

When picking the right roofing materials, homeowners and construction experts have many options at their fingertips. However, amidst the choices, there’s a star rising in the United Kingdom – fibreglass roofing, known as glass-reinforced plastic (GRP) roofing in technical terms.

Fibreglass roofing has gained popularity among homeowners for good reasons. It’s cost-effective and known for its lightweight characteristics and relatively straightforward installation.

However, it’s essential to be aware of certain potential drawbacks of this roofing choice. It’s all about making an informed decision regarding your roofing needs.

This article will guide you about some of the major advantages and disadvantages of Fibreglass Roofing to make it easy for you to decide. So, without further ado, let’s get started!

Advantages of Fibreglass Roofing

When it comes to fibreglass roofing, there’s a treasure trove of benefits to explore:


Having a roof that weathers storms and the test of time with grace requires minimal repairs along the way. Fibreglass roofing delivers exactly that—sturdy, long-lasting protection. Thus, if you want a long-lasting and safe home, you may want to consider installing GRP fibreglass roofing.


While it stands strong, fibreglass doesn’t weigh your structure down. It’s like having robust, surprisingly light armour, reducing the strain on your building. Installing a fibreglass roof is not all about having durable roofing; it also needs to be lightweight.


Fibreglass flat roof is a versatile roofing champion, capable of meeting a wide range of roofing requirements. It can handle the job regardless of whether you have a flat roof or particular design requirements.

Seamless Installation

Installing fibreglass roofing is like crafting a flawless masterpiece. Its seamless finish leaves no room for gaps or seams that might let pesky leaks sneak in.

Low Maintenance

We all love a low-maintenance choice, right? With fibreglass roofing, you’re in luck. It demands minimal care and attention, freeing you from constant upkeep. Say goodbye to frequent repairs and hello to peace of mind.


While you may have considered the benefits of fibreglass roofing, let’s have a look at some of the Disadvantages of Fibreglass Roofing:

Cost Considerations

While offering numerous advantages, fibreglass roofing comes at a higher initial cost than some traditional roofing materials. This might require homeowners to budget for the installation carefully. Besides the installation cost, fibreglass roofing material may also cost a fortune. Thus, it might not be a good idea if you are on a tight budget.

Installation Complexity

Installing fibreglass roofing, particularly on roofs with intricate designs or features, can be more challenging. Specialised expertise may be needed to ensure a flawless installation.

Energy Efficiency

Fibreglass may be less energy-efficient than other roofing materials with better insulation properties. This could lead to slightly higher heating and cooling costs over time.

Discoloration Over Time

While you may be looking for a way to repair a fibreglass roof, you may face another problem: discolouration of fibreglass. Like any exposed material, fibreglass roofing can undergo discolouration as it faces the elements. This is a natural part of the weathering process.

Hail Vulnerability

Fibreglass roofing may be more vulnerable to damage from an impact in areas where hail storms are common. This might result in shattering and potential harm to the underlying roof structure.

Noise in Storms

Rain and hail on a fibreglass roof can be louder than other roofing materials, potentially leading to a noisier indoor environment during storms.

UV Damage

Prolonged exposure to the sun’s UV rays can gradually impact the fibreglass material. This may lead to reduced longevity and performance.

Weather Sensitivity

While fibreglass roofing offers good weather resistance, it may not be as robust in extreme weather conditions, which can lead to a shorter lifespan.

Replacement Challenges

One of the biggest Disadvantages of Fibreglass Roofing is facing challenges while replacing them. When it’s time for a replacement, the entire fibreglass roof must be removed, which is costly and time-consuming.

Limited Repair Options

Repairing fibreglass roofs can be limited in scope, sometimes making replacement a more practical solution for addressing damage.

Slippery Surface

Fibreglass can be slippery when wet, posing potential safety concerns during maintenance or cleaning activities.

Limited Colour Choices

If you have specific colour preferences for your roof, fibreglass roofing may not offer the extensive range of options you desire.

Is Fibreglass Roofing Suitable For All Types Of Buildings?

Fibreglass and Glass Reinforced Plastic (GRP) roofing offers more than a sleek appearance and long-lasting performance. Their adaptability is a standout feature. These roofing options can be tailored to fit nearly any size and shape, making them incredibly versatile.

Fibreglass GRP roofing is like a custom-tailored suit for your roof. Whether you’re working on a cosy domestic dwelling or a sprawling industrial or commercial complex, they’ve got you covered. Their durability and flexibility are why they’re equally at home on the rooftops of small homes and vast industrial structures.

So, regarding roofing, fibreglass and GRP are the versatile, reliable, and stylish all-rounders you can depend on for a wide range of projects, regardless of their size.


Researching fibreglass roofing before its installation is crucial as it may open doors to both the advantages and Disadvantages of fibreglass Roofing. While you may be in a dilemma choosing it, consider various other options to avoid future hassle. While it does not have all things bad about it, it can also be durable and sturdy, which will be helpful to secure your home in tough times.

Thus, if you are one of those people who would want to install fibreglass roofing at any cost, make sure that you are prepared for the challenges!

Emmanuel Nwaebo

Emmanuel Nwaebo is the Managing Director at Powerpillar Ltd and has more than 25 years experience in building construction and renovations. He has a bachelor’s in Electronics and Electrical Engineering with certification in Construction Health and Safety Technician (CHST). With an experience in managing construction and renovation services for years, he is extremely passionate about property management and loves helping people find their dream property.

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