Fiberglass vs. Steel Doors – Comparison

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A door is not just a parting structure, it serves many other functions. It keeps the interior of your house secure and the exterior looking elegant and tall. Of course the design of the door is important. But it is also important to make sure you choose the right material. With the ongoing debate between fiberglass vs. steel doors, it is easy to get confused. There are a lot of options available in the market today. With options also comes confusion. But once you know the pros and cons of each, the decision becomes rather simple. In this article, we will cover everything you need to know to make the right decision about your doors.

While fiberglass doors are newer as compared to the traditional steel ones, many still prefer going for steel. However, many new homeowners are switching to fiberglass instead. But there are various aspects in which one is better than the other. Depending on your requirements, you will be able to find the right .

Installation Process

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No matter what door you end up choosing, you must always consider professional installation. In terms of the installation process, the measurement is taken of the door frame along with the hinges. The door is made according to the frames. In terms of the installation process, the fibreglass door is quicker and easier to install as it is prehung and does not require a lot of post-installation fixing. So, if you are looking for a fast and efficient job, fibreglass is the choice for you. This is also because the doors made of this material are lighter and easier to handle.

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A steel door is more or traditional, it has a slightly more elaborate installation process. This is done by first having the door cut according to the measurements and other specifications of the frame. A steel door also requires anchors and wall frames to ensure the structure looks perfectly fit for the frame. Depending on the frame and the door, you might sometimes need a new drywall around the frame.


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Fiberglass exterior doors are often priced to be the same as wooden doors. Between steel and fibreglass, the cost varies keeping in mind the style, quality, and size. On an average, a good A quality fiberglass door can range from $800 to $1,000. If you want to go for a top quality door, it can cost you between $1,500 and $2,500. Upon adding the installation cost, a fibreglass variety can cost you between $3,200 and $5,000. It is important to choose the right door installation company in order to save on a good quality and well-installed door.

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If you are looking for a decent quality steel exterior door, the starting price is between $200 to $500. Thickness of the steel majorly determines the price of the door. If you go for a top quality door, you will end up paying anywhere between $800 to $1000. Including the installation price, a steel door can range from $600 to $1,800.

In terms of the price, steel doors are more affordable and good for those on a budget.

Energy Efficiency

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If compared to wooden doors, both steel and fiberglass offer high efficiency. However, fiberglass as a material is more energy efficient than steel. While there are many coats and polishes that make steel doors more efficient, fibreglass is more effective in maintaining proper temperature throughout the year. Within fiberglass, there are many varieties like ComforTech Warm Edge Glazing System in ProVia that are marked by Energy Star standards for energy efficiency all year round. When it comes to steel doors, while they are more energy efficient than wood, they still don’t offer all-year energy savings compared to fiberglass. There are some varieties in steel like ProVia Legacy Steel that comply with the Energy Star standard of energy efficiency.


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Fiberglass entry doors are easy to maintain. They are fairly more resistant to denting and scratching and are easy to clean. Most doors can be cleaned with soap and water and can be refinished professionally from time to time. resisting denting and scratching, and can be cleaned with mild soap and water. Steel on the other hand is also easy to maintain but as compared to fiberglasses, they are more prone to scratches and dents. They may also rust if the paint is not properly applied. If steel doors get scratches and dents, they can be fixed with a body repair kit.


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If compared to wooden doors, fibreglass is more solid in terms of offering security. However, the heaviness of steel makes it an obvious choice for those who prioritise security over other features. Many homeowners and commercial property owners go for steel doors to get better protection against theft and break-ins.


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While most wooden doors may crack or shrink, fiberglass doors do not crack, wrap, shrink or get delaminated on their own. These are best suited for harsh and humid climates. Many of these come with long or lifetime warranties allowing door owners to stay tension free through the length of their ownership and beyond. In terms of durability, steel doors are not far behind. The best quality of steel doors come with long and lifelong warranties letting door owners stay tension free.


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As a material, fiberglass wins over steel doors in resistance to heat. Unlike steel, these doors do not transfer heat from the outside to inside making sure the temperature inside your home or commercial property is well-maintained. Instead of transferring the heat, it absorbs the heat. Fiberglass can withstand temperature fluctuations which makes it the best suited for extreme climates.

Entry Door Resale Value

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In terms of resale value, steel wins over fiberglass as it can give upto 90% of your investment back. Fiberglass on the other hand can also be sold again at a 77% resale value.

Now that you know all the aspects of fiberglass doors vs. steel doors, you can now make the best choice depending on your requirements.

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