Your exterior doors are crucial to the overall aesthetic of your home, and they are your first line of defense against the outdoors. Choosing the best exterior doors means taking to account appearance, strength, and cost-effectiveness. This is why fiberglass is the best choice for you.

Fiberglass Exterior Doors

Fiberglass doors have a polyurethane core for insulation, sandwiched between two sides made with fiber-reinforced polymer. The insulation is fantastic for temperature regulation, which makes fiberglass the most energy-efficient option in the market.

The polymer used for fiberglass doors can be finished in any look you want. Manufacturers use an artificial grain to make fiberglass look so much like wood that you will not be able to tell the difference at first glance.

Main Benefits of Fiberglass Doors

The three main materials for doors are fiberglass, wood, and steel. Here are the reasons why you should choose fiberglass:

1. Fiberglass Doors Are Strong and Durable

Fiberglass doors are very durable. While a wooden door may chip or a steel door may dent, fiberglass can outlast either of them. The secret to a fiberglass door’s strength is its composite construction. This means it will have no trouble at all keeping the outside world away from your home.

Fiberglass doesn’t shrink, no matter the climate. So if you live in humid conditions or the temperatures outside get below zero, you won’t have anything to worry about.

2. Fiberglass Doors Are Energy Efficient

The thick polyurethane layer in the core of every fiberglass door makes temperature control a breeze. In the depth of winter, your exterior doors will keep the frigid cold away from your home. This means your heating system won’t have to work too hard to keep you and your family warm every day and every night.

Fiberglass scores up to four times higher than wood and two times higher than steel in the professional insulation rating system (R-Value).

3. Fiberglass Doors Don’t Need Much Upkeep

Fiberglass is strong and sturdy and will remain so even with little to no regular maintenance. The material is resistant to fading and cracking. While wood doors need to be restained or repainted, fiberglass doors don’t show any wear and tear even after years of use. All you need to do is wipe away any collecting dust or dirt with a damp cloth.

4. Fiberglass Doors Look Great

Fiberglass doors come in many different designs. All you have to do is choose one that fits your style and your home’s exterior aesthetic. If you want authentic, wood-like texture, manufacturers can easily mimic the look of genuine wood. If you want a sleeker look, you can opt for a traditional flat finish.

Custom fiberglass doors can fit any entryway. You can also incorporate windows or other finishing touches—fiberglass is very easy to customize.

5. Fiberglass Doors Are Cost-Effective

Fiberglass falls right in between highly expensive genuine wood and cheaper steel. While not the most inexpensive option of the lot, you will be able to recoup all door installation costs because of the minimal upkeep and energy efficiency. Fiberglass doors are very much worth the price!


If you’re in the market for new exterior doors, fiberglass is the best option for you. High-quality fiberglass is strong, durable, a good insulator, and can easily be designed to suit your style. Once you have fiberglass doors installed, you won’t ever have to worry about rot, dents, or warping caused by the elements.

Are you looking for exterior door installation services in London? McCallum Aluminium has been serving the area for nearly 60 years. Our steel and fiberglass replacement doors are among the best products available in the market. Contact us for a free estimate today!

Call direct @ 519-433-4223