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Disadvantages of Fibreglass Roofing: What You Need to Know

Updated: Sep 27


Fibreglass roofing can be brittle. It may crack under heavy impact or extreme temperature changes. It also requires regular maintenance to prevent leaks.

Fibreglass roofing is popular for its lightweight and durable properties. Many homeowners and businesses choose it. It resists corrosion and is easy to install. Despite its advantages, fibreglass roofing has some notable drawbacks. It can become brittle, especially in colder climates, making it susceptible to cracking.

Maintenance is crucial as fibreglass roofs can develop leaks over time. They also have a relatively high initial cost compared to traditional roofing materials. Proper installation is vital to avoid future issues. Understanding these disadvantages can help in making an informed decision about roofing options.


Exterior view of a spacious house made of brick and stone, topped with a fibreglass roof for enhanced durability and style.

High Initial Cost

Fibreglass roofing offers many benefits, but it comes with some drawbacks. One major downside is the high initial cost. This cost can deter homeowners from choosing fibreglass roofing. Understanding these expenses can help you make an informed decision.

Installation Expenses

The installation expenses for fibreglass roofing are significant. Skilled labour is required to ensure a proper installation. This means you need to hire professionals, which can be costly.

Here are some reasons why installation costs are high:

  • Specialised Skills: Installing fibreglass roofing requires specialised skills and training.

  • Time-Consuming: The installation process can be time-consuming, adding to labor costs.

  • Equipment: Specialised equipment is needed, which can add to the overall cost.

Below is a table showing an average cost breakdown for installation:

Item

Average Cost

Labour

£90-£180 per hour

Equipment Rental

£200-£500

Additional Materials

£100-£300

These expenses make fibreglass roofing installation costly. Homeowners need to budget carefully to cover these costs.

Material Costs

The material costs for fibreglass roofing also contribute to the high initial cost. Fibreglass is durable and long-lasting, but this quality comes at a price.

Key factors affecting material costs include:

  • Quality: High-quality fibreglass materials are more expensive.

  • Thickness: Thicker fibreglass sheets cost more.

  • Weather Resistance: Materials designed to withstand harsh weather conditions are pricier.

Here is a table showing the average costs for different types of fibreglass materials:

Material Type

Average Cost per Square Foot

Standard Fibreglass

£5-£9

Premium Fibreglass

£9-£13

Weather-Resistant Fibreglass

£13-£17

These material costs can add up quickly. Homeowners must consider both installation and material expenses when choosing fibreglass roofing.


Weight Issues

Fibreglass roofing is popular for its durability and weather resistance. Yet, it has some drawbacks. One major issue is its weight. Fibreglass roofing is heavy. It can cause structural issues and damage.

Structural Support Needs

Fibreglass roofing is heavier than other materials. This extra weight requires strong structural support. Older buildings might struggle to handle this weight. They may need reinforcement, which can be costly.

Consider these factors:

  • Additional beams: More beams might be needed to support the weight.

  • Stronger foundations: The foundation must be strong enough to bear the load.

  • Professional inspection: Always get a professional to inspect the structure before installation.

Here is a table comparing weight of different roofing materials:

Material

Weight per Square Foot

Fibreglass

2-3 lbs

Asphalt Shingles

1.5-2 lbs

Metal

1-1.5 lbs

As shown, fibreglass is heavier than asphalt shingles and metal. This means extra costs for reinforcing the structure. Always factor in these costs when planning your roofing project.


Close-up of a roof showing damaged shingles, indicating risks associated with fiberglass roofing.

Potential For Damage

Heavy fibreglass roofing can cause potential damage. Roof sagging is a common issue. If the structure can't handle the weight, it may sag over time. This sagging can lead to leaks and other problems.

Key concerns include:

  • Cracking: The roof may crack under pressure.

  • Leaks: Cracks can lead to water leaks, damaging the interior.

  • Costly repairs: Fixing these issues can be expensive.

Heavy weight can also impact gutters and drainage. If the roof sags, water may not flow properly. This can cause water pooling, leading to more damage.

Consider the following preventive steps:

  1. Regular inspections: Check the roof regularly for signs of sagging or damage.

  2. Proper drainage: Ensure gutters and downspouts are clear to prevent water pooling.

  3. Professional maintenance: Hire professionals for regular maintenance and repairs.

Fibreglass roofing is durable but has weight issues. Proper structural support and regular maintenance are crucial to avoid potential damage.


Temperature Sensitivity

Fibreglass roofing has many advantages, but it comes with its own set of challenges. One significant drawback is its temperature sensitivity. Fibreglass roofs react to temperature changes. This can cause issues over time. Let's delve deeper into this aspect.

Expansion And Contraction

Fibreglass roofing materials expand in heat and contract in cold. This continuous cycle can lead to several problems:

  • Cracks and Splits: Over time, the expansion and contraction can cause the fibreglass to crack.

  • Sealant Issues: Sealants used around joints and edges can become less effective.

  • Structural Stress: Repeated temperature changes put stress on the roofing structure.

These issues can significantly impact the integrity of the roof. Frequent temperature fluctuations can speed up wear and tear. This means more maintenance and potential repairs.

Effect On Lifespan

The temperature sensitivity of fibreglass roofing can significantly affect its lifespan. Here are some of the ways it impacts durability:

  • Increased Maintenance: More frequent inspections and repairs are needed.

  • Premature Aging: The roof may not last as long as initially expected.

  • Potential Leaks: Cracks and splits can lead to water leakage.

Temperature changes can weaken the fibreglass material. This shortens the roof's expected lifespan. To keep the roof in good shape, regular maintenance is crucial.

Proper care can mitigate some of these issues. However, it's important to be aware of the potential for faster deterioration due to temperature sensitivity.


Maintenance Challenges

Fibreglass roofing is popular for its durability and lightweight properties. Yet, it has its disadvantages, especially on maintenance. Homeowners often face maintenance challenges that can be time-consuming and costly. We will explore two key issues: repair difficulty and cleaning needs.

A man in a hard hat and safety glasses repairs fibreglass roofing on a residential building.

Repair Difficulty

Fibreglass roofing may be durable, but repairing it can be quite challenging. Unlike traditional roofing materials, fixing fibreglass often requires specialised tools and skills. Here are some key points:

  • Specialised Tools: Standard repair tools may not work on fibreglass. You often need specific tools that can handle the material without causing further damage.

  • Expertise Required: Repairing fibreglass requires expertise. It's not a DIY-friendly task, and hiring professionals can be expensive.

  • Time-Consuming: The repair process can be lengthy. It often involves multiple steps, including cleaning, sanding, and applying resin and cloth.

Cleaning Requirements

Keeping a fibreglass roof clean is another maintenance challenge. While it may look simple, cleaning requires specific steps to avoid damaging the material:

  1. Use Gentle Cleaners: Harsh chemicals can damage fibreglass. Always use mild, non-abrasive cleaners.

  2. Soft Brushes Only: Hard-bristled brushes can scratch the surface. Use soft brushes or sponges to clean.

  3. Regular Cleaning Schedule: To prevent dirt buildup, clean the roof regularly. This can help maintain its appearance and longevity.

Failure to follow these steps can lead to issues such as:

  • Surface Damage: Scratches and abrasions from improper cleaning tools.

  • Discoloration: Stains from harsh chemicals.

  • Mold Growth: If not cleaned regularly, mold and algae can develop.

Keeping these cleaning requirements in mind can help you maintain your fibreglass roof better. Yet, they add to the overall maintenance burden, making fibreglass roofing less appealing for some homeowners.


Limited Lifespan

Fibreglass roofing is popular due to its lightweight and waterproof properties. But it has some drawbacks. One major disadvantage is its limited lifespan. Understanding this can help in making an informed decision about roofing materials.

Durability Concerns

Fibreglass roofs can last between 20 to 30 years. This may seem like a long time, but compared to other roofing materials, it falls short. For example, metal roofs can last over 50 years, and slate roofs can last even longer.

Several factors affect the durability of fibreglass roofing:

  • Weather conditions: Extreme weather can cause wear and tear.

  • Installation quality: Poor installation can lead to leaks and damage.

  • Maintenance: Regular maintenance is needed to extend its life.

Fibreglass roofing can crack and become brittle. This is especially true in cold climates. Cracks can lead to leaks and water damage. This makes the roof less durable over time.


A man in a safety vest and hard hat inspects a metal roof, focusing on fiberglass roofing replacement frequency.

Replacement Frequency

Fibreglass roofs need to be replaced more often than other types. Frequent replacement increases costs and effort. Every replacement involves removing the old roof and installing a new one.


Here are some reasons why fibreglass roofs need frequent replacement:

  • Cracking: Fibreglass can crack, especially in cold weather.

  • UV damage: Sunlight can weaken the fibreglass over time.

  • Water damage: Leaks can cause structural damage to the roof.

Each replacement can take several days. This can be inconvenient for homeowners. The cost of replacement can add up over the years. Investing in a more durable roofing material might be a better option in the long run.

Fibreglass Flat Roofing London

In London, fibreglass flat roofing is quite common. Many suppliers offer fibreglass roofing supplies London residents can buy. Despite its popularity, the limited lifespan is a concern.

London's weather can be harsh on fibreglass roofs. Rain, snow, and fluctuating temperatures can cause damage. Regular maintenance is crucial to keep the roof in good condition. Even with maintenance, the roof may still need replacement every 20-30 years.

Choosing fibreglass flat roofing in London requires careful consideration. It's essential to weigh the initial cost against the long-term expenses. Frequent replacements can make fibreglass less cost-effective over time.

For those considering fibreglass roofing supplies London offers many options. Bell Asphalt Co. is here to help. We recommend consulting experts. They will help you choose the best roof for your needs.


Environmental Impact

Fibreglass roofing offers durability and versatility, but it has several environmental drawbacks. We must understand the environmental impact of fibreglass roofing. It's vital for those concerned about sustainability. This section explores the production footprint and disposal issues of fibreglass roofing.

An industrial plant showcasing various equipment and processes related to fibreglass roofing production.

Production Footprint

The production of fibreglass roofing materials involves several energy-intensive processes. The raw materials needed, such as glass and various resins, require significant energy to produce. This high energy consumption results in a large carbon footprint, contributing to global warming.

Additionally, the chemicals used in the production process can be harmful to the environment. Many of these chemicals are derived from petroleum, a non-renewable resource. During production, these chemicals can release volatile organic compounds (VOCs) into the atmosphere, polluting the air and harming human health.

Here are some key points regarding the production footprint of fibreglass roofing:

  • High energy consumption during production

  • Use of non-renewable resources like petroleum

  • Emission of volatile organic compounds (VOCs)

  • Significant carbon footprint contributing to climate change

For those in urban areas, seeking alternatives or consulting with fibreglass roof specialists in London can help mitigate some of these environmental impacts. They can provide insights into more sustainable roofing options.

Disposal Issues

Disposing of fibreglass roofing materials presents significant environmental challenges. Fibreglass is not biodegradable, meaning it does not break down naturally in the environment. This leads to increased landfill waste, which contributes to environmental degradation.

Once disposed of, fibreglass can release harmful chemicals into the soil and water. These chemicals can contaminate local ecosystems and pose risks to wildlife and human health. Moreover, the recycling options for fibreglass are limited, making it difficult to manage waste effectively.

Key disposal issues include:

  • Non-biodegradable nature leading to increased landfill waste

  • Potential release of harmful chemicals into the environment

  • Limited recycling options for fibreglass materials

  • Environmental contamination affecting local ecosystems and human health

Those concerned about these disposal issues should seek advice from fibreglass roof specialists in London for eco-friendly disposal methods. These specialists can guide proper disposal practices and potential recycling opportunities to minimize environmental impact.


Aesthetic Limitations

Many homeowners prefer fibreglass roofing. It is durable and cheap. But, it comes with certain drawbacks, especially in the realm of aesthetics. Fibreglass roofing has poor aesthetics. It can hurt your home's appeal, making it less desirable than other options. This section will explore two main concerns: design options and colour fading.

Design Options

One of the major aesthetic limitations of fibreglass roofing is the limited design options available. Unlike traditional roofing materials like tiles or shingles, fibreglass roofing often comes in a very narrow range of styles. This can make it difficult for homeowners to find a design that complements the architectural style of their home.

Here are some of the design limitations you may encounter:

  • Lack of Texture: Fibreglass roofing typically lacks the textured finish that other materials offer. This can result in a flat, less dynamic appearance.

  • Limited Styles: While other roofing materials come in various shapes and patterns, fibreglass roofing is generally available in just a few standard designs.

  • Generic Look: Many homeowners feel that fibreglass roofing gives their home a more generic, less unique appearance.

Colour Fading

Another significant aesthetic drawback of fibreglass roofing is colour fading. Over time, exposure to sunlight and weather elements can cause the colour of the fibreglass to fade, making your roof look old and worn.

Here are some factors contributing to colour fading:

  • UV Exposure: Constant exposure to ultraviolet rays can break down the pigments in the fibreglass, leading to fading.

  • Weather Conditions: Rain, wind, and temperature fluctuations can accelerate the fading process.

  • Quality of Materials: Lower-quality fibreglass materials are more prone to fading compared to high-quality options.

The table below shows how fibreglass roofing compares to other materials in terms of colour durability:

Material

Color Durability

Fibreglass Roofing

Low

Tile Roofing

High

Metal Roofing

Medium

For those considering fibreglass roofing in London, it’s essential to be aware of these aesthetic limitations. Colour fading can significantly reduce the visual appeal of your home, making it less attractive and possibly affecting its resale value.


Installation Complexity

Fibreglass roofing is popular for its durability and weather resistance. Yet, it has some disadvantages, especially regarding installation complexity. Installing fibreglass roofing requires precision and expertise. This often makes the process more challenging and costly.


A white fibreglass roof reflecting light, showcasing its smooth surface and modern design.

Skilled Labour Needs

Installing fibreglass roofing demands highly skilled labour. Unlike other roofing materials, fibreglass requires specialised knowledge and experience. This means hiring professionals who know the intricacies of fibreglass.


Here are some reasons why skilled labour is crucial:

  • Proper Handling: Fibreglass sheets are delicate and require careful handling to avoid cracks.

  • Accurate Measurement: Precise measurements ensure a perfect fit, preventing leaks and other issues.

  • Expert Installation: Professionals know how to properly seal joints and edges, ensuring durability.

Hiring skilled labor can be expensive. The cost varies depending on the complexity of the roof and the expertise required.

As seen, the cost of skilled labor can significantly impact the overall installation budget. This makes fibreglass roofing a more expensive option compared to other materials.

Time-consuming Process

Installing fibreglass roofing is a time-consuming process. The need for precision and careful handling extends the installation timeline. This can cause delays and increase labor costs.

Reasons why the process takes longer:

  1. Surface Preparation: The roof surface must be clean and smooth before installation.

  2. Layering: Fibreglass roofing often requires multiple layers for added strength.

  3. Curing Time: Each layer needs adequate time to cure before the next layer is applied.

Here's a comparison of installation times for different roofing materials:

Roofing Material

Average Installation Time

Asphalt Shingles

1-2 days

Metal Roofing

2-3 days

Fibreglass Roofing

3-5 days

The extended installation time not only increases labour costs but also impacts the project timeline. This can be a significant disadvantage for those needing a quick roofing solution.


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Contact Us Today

Fibreglass roofing has some drawbacks that homeowners should think about. Issues like cracking, high costs, and difficult installation can make it less appealing. Even though it's durable, fibreglass roofing may not be the best choice for everyone. It's important to think carefully about these downsides before deciding.

If you're unsure, it's always a good idea to talk to a professional. At Bell Asphalt Co., we’re here to help! Contact us today, and we can guide you to the best solution for your roofing needs.


Common Questions About Disadvantages of Fibreglass Roofing

What Are The Downsides Of Fibreglass Roofing?

Fibreglass roofing can be a good choice for many, but it has some downsides. One big issue is UV damage. Over time, sunlight can make the roof fade and become brittle, meaning it may need more repairs or even replacement sooner than other types of roofs.

Another downside is the installation. Fibreglass roofing needs skilled workers to install it right, which can cost more. If not done properly, it can lead to leaks or problems later. While fibreglass is lightweight, it may not be as strong as other materials in tough weather.

At Bell Asphalt Co., we can help you decide if fibreglass roofing is the best choice for you! Contact us for expert advice.

Is Fibreglass Roofing Expensive?

Fibreglass roofing can cost more upfront than other materials like asphalt shingles. The price depends on the size of the roof, how tricky the installation is, and the type of fibreglass used. Fibreglass costs more at first. But, it is durable and needs less maintenance. So, it can save money in the long run.

Fibreglass roofs last a long time and save energy. So, homeowners save on repairs and replacements. Some insurers might discount fibreglass roofs for their durability in bad weather.

Does Fibreglass Roofing Require Maintenance?

Fibreglass roofing needs some care, but not as much as other types of roofs. Regular checks are important to spot any problems early. Look for cracks or blisters, which can happen from too much sun or bad weather. Keeping the roof clean by removing leaves and dirt will help it stay strong and look good.

Also, check the seams and joints for leaks. If you see any issues, fixing them quickly can stop bigger problems later. With a little care, fibreglass roofs can last a long time and work well.

How Long Does Fibreglass Roofing Last?

Fibreglass roofing is durable and long-lasting. It lasts 20 to 30 years with proper maintenance. The lifespan can vary. It depends on the quality of the installation, the local climate, and roof maintenance. Regular inspections and maintenance are vital for its long life. Fixing minor issues quickly can prevent major problems.

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