Are fibreglass French doors good

Yes, fibreglass French doors are ideal for residential and commercial properties. As an inherently durable and stable material, fibreglass offers superior resistance to extreme temperatures, moisture, UV rays and more.

Furthermore, it is low-maintenance, energy-efficient and can be painted or stained for a realistic wood-grain look. Additionally, the tight fibreglass seal ensures protection from heat transference or thermal incursion.


Fibreglass doors provide many benefits, such as durability, energy efficiency, and resistance to warping or weathering. Additionally, they are impact-resistant and hard to break through. They can also be customized to match the style of your home and are relatively low maintenance. However, fibreglass doors have some drawbacks that should be taken into consideration.

The most significant disadvantage is their price, as they are usually more expensive than other types of entry doors. In addition, cheaper models may need to be replaced due to cracking, which could cost more in the long run. Furthermore, not all fibreglass doors are available for trimming and those that do require professional installation to do so correctly.

Therefore, before investing in a fibreglass door, it’s essential to consider all the associated pros and cons.


When deciding on French doors for your home, fibreglass is superior to vinyl. Fiberglass French doors are more durable and energy-efficient than their vinyl counterparts. They also provide an airtight seal against cold and heat, translating to more significant energy savings.

Unlike vinyl French doors, fibreglass frames can be custom painted to meet your aesthetic needs. On the other hand, vinyl French doors have limited hardware options and tend to leak air through the door frame, reducing insulation and creating drafts.

Additionally, vinyl doors will need maintenance to keep them looking good and usually come with a manufacturer’s warranty of one year or less.

Personal perspective point of view peeking through the front door


When selecting between these options, it is important to consider durability, energy efficiency, security, maintenance requirements and appearance. Fibreglass doors are more durable than their wood counterparts as they are resistant to sun exposure and weathering and won’t rot or warp like wood.

Additionally, fibreglass doors have higher thermal resistance when compared to wooden ones, making them more energy-efficient. Furthermore, fibreglass entry doors boast greater security when installed adequately than most wooden entries because of their superior solid construction.

However, while fibreglass can sometimes look like natural wood, a discerning eye may be able to tell the difference. Therefore, wood remains a popular choice for its natural texture, which many people find appealing. The wood door may also offer good insulation, but fibreglass vessels retain heat in winter temperatures better and reject it during intense sun events.


Fibreglass doors are generally very durable and resistant to scratches. However, it is possible to scratch a fibreglass door with sufficient force. Fibreglass door materials are slightly more expensive than other materials, such as wood or steel.

Still, they offer excellent durability and resistance to dents, rust, and other similar damages that can occur over time. Furthermore, since fibreglass doors require minimal maintenance and upkeep, they can last many years if properly cared for.

How long will an exterior fibreglass door last?


Fibreglass exterior doors are popular for longevity and low maintenance requirements. These durable doors can last over 70 years; some have been known to last over 100 years. This is several times the lifespan of other door materials like wood, which typically requires replacing after 20-60 years, depending on the wood used.

Additionally, fibreglass doors have a higher energy efficiency rating than other materials, with an R-value of 6 compared to 2 for wood. Fibreglass does not shrink or swell in different climates, does not require painting or staining and usually comes with a lifetime warranty if it fails for as long as you own your house.

As such, fibreglass exterior doors are generally considered the most durable and cost-effective door material today.

Can fibreglass doors be painted?


Yes, fibreglass doors can be painted. Priming the door is a crucial step as it provides a better bond between the paint and the surface of the door to ensure long-term adhesion. The recommended primers are Extreme Bond or Multi-purpose primer from Sherwin Williams, Prime Solution bonding primer from Cloverdale Paint, and ScuffX from Benjamin Moore.

For the topcoat, using 100% acrylic paint is highly recommended for interior and exterior use. The painting involves cleaning off any dirt or debris from the door’s surface, applying an adhesion or bonding primer, and then top coating with 100% acrylic paint.

Proper preparation for each step is essential to get lasting results. Special care should also be taken when applying multiple coats to make sure that complete coverage is achieved.

Fibreglass door problems?


One of the most common problems with fibreglass doors is cracking. During the winter season, the rigid material of fibreglass doors contracts which can lead to cracks and sometimes falling apart of some inexpensive and low-quality fibreglass entry doors. These cracks degrade the appearance of the doors and make a passage for cold air to enter the house.

Another problem is staining, which requires periodic maintenance.

Warping is another issue that can occur with fibreglass doors when exposed to extreme temperatures or moisture, causing them to bend or twist out of shape.

Loose screws in the hinges can also cause issues in door operation, leading to misalignments.

Luckily, there are ways to prevent or fix these problems – choosing high-quality fibreglass doors with a warranty and regular maintenance will help prolong their life while hiring a professional installer will ensure that it is installed correctly and prevent other issues from occurring.

Dining Room fibreglass doors



Composite fibreglass doors have a competitive cost compared to wooden doors, which are often cheaper. Generally, the cost of quality fibreglass doors ranges from $3000 – $5000 for custom-built models. However, although more expensive than most fibreglass alternatives, steel security doors are deemed more secure and insulated.

Fiberglass offers around 75% return on investment, while steel gives homeowners an estimated return rate of 90%. Additionally, fibreglass is longer lasting and easier to maintain than wood or steel materials, yet it can break under forceful pressures and is more expensive than other doors.

Steel is more vulnerable to rusting and considerable weight, although quality selections offering tight warranties and professional installation services can easily prevent these drawbacks.



Therma-Tru is a company that pioneered the fibreglass door in 1983.  Therma-Tru’s Classic-Craft premium entryways provide superior protection while capturing the look of natural wood in stile & rail design. With its high-performance features and authentic wood embossing, Therma Tru offers various styles of fibreglass entry doors to suit any home’s needs.

Windows & Doors By Brownell carries Therma-Tru fibreglass entry doors in various styles. At the same time, The Home Depot offers online or in-store purchase options with free shipping and installation services.

To maintain your fibreglass door, reapply the topcoat every 3-5 years or when the gloss fades and clean it with a household detergent and water according to manufacturer instructions.

Fibreglass French doors are an excellent option for any home as they offer improved security and energy efficiency compared to other door types. Additionally, they provide better acoustic insulation, are long-lasting and require minimal maintenance.

Their modern look makes them an aesthetically pleasing focal point in any home, making them an excellent choice for homeowners wanting to improve the overall feel of their space.

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James Davis

James Davis

I’m James Davis, a carpenter with eight years of experience in carpentry services, repairs, installations, renovations, and maintenance of interior doors. I have a diploma in carpentry and joiner trade from the Education Skills Australia Institute and take pride in delivering high-quality results to ensure customer satisfaction. I’m a blog writer for Octopus Doors Company and enjoy sharing my knowledge and tips on maintaining security measures and choosing the right door materials, paints, or handle styles. I specialize in custom-made interior doors and strive to make every home look fabulous. Contact me anytime for help with door-related issues.

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