Do Fibreglass Pools Crack?

Fibreglass pools are more popular than ever before, and it’s no surprise when you look at all the benefits that they offer. These sleek, low-maintenance, and cost-effective pools offer an attractive addition to any property.

Yet, one question that frequently arises from homeowners is; can a fibreglass pool crack? It’s a common misconception that fibreglass pools are more prone to cracking due to their lighter weight in comparison to concrete.

However, the reality reveals a different story as we take a look at the mechanics of fibreglass pools, explore their resistance to cracks, and showcase the expertise of a reputable fibreglass pool builder, like Awesome Pool and Spas.

Understanding Fiberglass Pools

Before we dive into the topic of cracking, it’s essential to understand what fiberglass pools are and how they are constructed.

Fiberglass pools are made using a combination of fiberglass strands, resin, and a gel coat finish. This construction method creates a strong, smooth, and non-porous surface that is resistant to algae growth and staining..

Factors Contributing to Cracks

While fiberglass pools are durable, there are factors that can contribute to cracks, just like any other type of pool material. Let’s take a look at some of these factors:

  1. Ground Movement: The soil composition and ground movement in your area can affect any type of pool. Shifts in the ground can put stress on the pool shell, potentially leading to cracks. However, proper installation and site preparation can help mitigate this risk.
  2. Poor Installation: A poorly installed fiberglass pool can be more susceptible to cracking. It’s essential to choose a reputable and experienced pool installer to ensure that the pool is set up correctly.
  3. Impact Damage: Like any other pool, fiberglass pools can suffer from impact damage if heavy objects or sharp objects are dropped or dragged across the pool’s surface. While the gel coat finish is relatively tough, it’s not entirely impervious to damage.
  4. Extreme Temperature Changes: Extremely rapid temperature changes, such as filling a hot pool with cold water, can cause minor surface cracks, known as “spider cracks.” These are usually cosmetic and do not affect the pool’s structural integrity.

A Strong Case for Fibreglass

When it comes to long-term wear and durability, fibreglass takes the lead over concrete as a superior pool building material. Concrete pools are notorious for their proneness to cracks and chips, which can result from minor pressure from running and jumping.

This vulnerability is due to concrete’s strength in compression but weakness in tension. In contrast, fibreglass pools are engineered to ensure prolonged strength and resilience, making them highly resistant to everyday wear and tear. Manufacturers of fibreglass pools have such confidence in their durability that they offer extended warranties.

Additionally, fibreglass pools exhibit remarkable stability, even in areas with unstable soil or ground movement, thanks to their unique composition and structural design.


One potential cause of cracks in a fibreglass pool is incorrect installation. Uneven surfaces and shifting ground beneath the pool can lead to structural issues over time.

Fortunately, the team at Awesome Pool and Spas are highly trained and experienced with correct installation procedures, virtually eliminating the chances of surface or structural cracks.

Our careful and meticulous approach includes thorough site preparation, precise leveling, and appropriate backfilling, providing a stable foundation for the fibreglass pool.

With years of experience as a trusted fibreglass pool builder, we understand the unique challenges posed by different terrains and soil conditions.

This attention to detail ensures that your pool not only enhances the aesthetics of your property, but also proves to be a long-lasting investment, capable of withstanding everyday use.

Surface Cracks

Surface cracking is essentially small hairline cracks that form in the gel coat, and it is a common occurrence in fibreglass pools over time. The good news is that these cracks are superficial and do not compromise the pool’s structure.

Most of the time, you may not even notice their presence. However, if cracks appear alongside blisters, it could indicate that the gel coat was applied incorrectly. Professional pool resurfacing can rectify these issues, restoring the pool’s appearance to its original glory.

Additionally, spider cracks might develop due to external factors like tree roots in the ground or debris in the pool, but they will rarely compromise the integrity of the pool.

Managing Water Pressure

Maintaining proper water pressure is crucial for the structural integrity of a fibreglass pool. Draining the pool water too quickly or leaving the pool empty can lead to surface cracks.

This happens because fibreglass shells rely on water pressure to push against the ground, counteract soil pressure, and maintain their shape.

Fortunately, fibreglass pool builders incorporate structural ribbing technology to prevent such issues. This technology reinforces the shell, ensuring that the pool maintains its shape even when water pressure isn’t as high as it should be.

Our Commitment

Awesome Pool and Spas are dedicated to installing fibreglass pools that are built to withstand the wear and tear of everyday use. Our hydraulically designed fibreglass shells offer exceptional durability, reinforced with structural ribbing and wide edge beams.

This eliminates the need for additional engineering and increases the pools’ strength. Each fibreglass shell comes with a lifetime structural warranty, a testament to our confidence in the durability of our pools.

Choose a Fibreglass Pool

So yes, it is possible for a fibreglass pool to crack over extended periods of time. However, the flexibility and strength of fibreglass ensures that your pool will last for years.

These pools are designed to withstand daily use, and with a professional installation and regular maintenance, your pool will last a lifetime.

The best way to prevent cracks in your fibreglass pool is to use a highly experienced and qualified pool builder, such as Awesome Pool and Spas. With our expertise, you can be sure that your pool investment is in safe hands.

How to Preventing Cracks in Fiberglass Pools

To minimize the risk of cracks in your fiberglass pool, consider the following:

Proper Installation: Make sure experts with experience set up your pool correctly using the best methods. This helps prevent cracks from happening due to uneven ground or shifting underneath.

Regular Maintenance: Keep your pool clean and in good shape by cleaning it and balancing the water chemicals. This stops things like algae and stains, which can make cracks appear over time.

Avoid Impact Damage: Be careful when you have heavy things or sharp objects near your pool. Accidents with these can cause damage that leads to cracks in your pool.


In conclusion, fiberglass pools offer numerous benefits, including durability, resistance to cracks, low maintenance, and customization options. While it’s possible for surface cracks to occur over time, these are typically cosmetic and do not compromise the pool’s structure.

With proper installation, regular maintenance, and attention to factors like water pressure, homeowners can enjoy a fiberglass pool that lasts for years.

When considering a pool for your property, it’s essential to choose a trusted and experienced pool builder like Awesome Pool and Spas.

With their expertise and commitment to quality, you can be confident that your fiberglass pool investment will provide years of enjoyment and enhance the value of your home.

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