fiberglass doors

Fiberglass Doors

Disclaimer None of the manufacturers listed in this post paid to promote their products on Door Digest. This is strictly an independent review. Some links on this page are Amazon affiliate links which means if you choose to make a purchase, we may earn a small commission from Amazon at no extra cost to you. We greatly appreciate your support!

Are you looking for the best fiberglass doors to install in your home? Fiberglass doors are a great option for homeowners, builders and architects due to their energy efficiency, strength and versatility. They come in many styles that can match any type of décor or design preference. Not only do they provide excellent insulation from both hot and cold temperatures but also offer superior security features compared to other door types. In this blog post we’ll discuss the advantages of using fiberglass doors so you can make an informed decision when selecting the best fiberglass door for your needs.

Table of Contents:

What are Fiberglass Doors?

Fiberglass doors are a popular choice for homeowners, builders, and architects due to their durability and energy efficiency. They offer superior insulation compared to other door materials such as wood or steel, making them an ideal option for homes in colder climates. Fiberglass doors also require less maintenance than other types of doors since they don’t warp or rot over time.

Fiberglass doors come in a variety of styles and designs that can be customized to fit any home’s aesthetic. They are available in smooth finishes with no visible grain lines or textured surfaces that mimic the look of real woodgrain without the upkeep associated with wooden doors. Additionally, fiberglass can be stained or painted, so you can create one that matches your existing décor perfectly.

In terms of security, fiberglass is extremely strong and resistant to break-ins when properly installed by a professional contractor. It also has soundproofing properties which make it great for keeping out noise from outside sources like traffic or construction sites nearby.

Overall, fiberglass offers many advantages over traditional door materials including increased energy efficiency, low maintenance requirements, customizable design options and enhanced security features; making it an excellent choice for anyone looking to upgrade any exterior doors.

Advantages of Fiberglass Doors

Fiberglass doors are becoming increasingly popular due to their many advantages over other materials. They are energy efficient, durable, and require little maintenance.

Energy Efficiency:

Fiberglass is an excellent insulator and helps keep the heat in during winter months and out during summer months. This can help reduce energy costs by up to 25%. The foam core insulation also reduces noise transfer from outside sources.


Fiberglass doors are highly resistant to cracking, warping, splitting or denting that may occur with wood or steel doors over time. In addition, they will not rot like wooden doors do when exposed to moisture for extended periods of time.

Low Maintenance Requirements:

Unlike wood or steel doors which need regular painting or staining, fiberglass requires no additional treatment once installed. It also resists fading from UV rays so it will look great for years without any extra effort on your part.

Fiberglass doors offer a great combination of durability, security and aesthetic appeal. To ensure you get the best out of your door installation, be sure to read up on some tips for installing fiberglass doors in the next section.

Installation Tips for Fiberglass Doors

Fiberglass doors are a great choice for homeowners, builders, and architects looking to upgrade their entryways. They offer superior insulation properties and come in a variety of styles and colors. Installing fiberglass doors is not difficult but there are some tips that should be followed to ensure the door is secure and functions correctly.

Tips for New Fiberglass Doors in Existing Frames

Prepare Door Frame

Before attempting to install your new fiberglass door it’s important that you prepare the existing frame by removing any old paint or debris from around it as well as checking for rot or damage caused by moisture buildup over time. If necessary use wood filler or caulk to fill in any gaps between frames before proceeding with installation of your new fiberglass door.

Install Hinges & Hardware

Once you have prepared the frame you can begin installing hinges onto both sides of your new fiberglass door using screws provided by manufacturer if applicable (or purchased separately). Make sure all screws are tight so they don’t loosen over time causing problems with alignment down the road. Also attach handles, locksets, deadbolts etc., following instructions provided by manufacturer if applicable (or purchased separately).

Hang Door & Test Fitment

Now that all hardware has been installed on both sides of your new fiberglass door it is ready for hanging. Carefully lift one side at a time while having someone else hold up the other side until both sides are level, then check fitment against existing frame making sure there aren’t any gaps between edges where air could escape causing drafts inside home/building structure which would lead to higher energy bills due to loss in efficiency from poor insulation properties associated with improper fitting doors/windows etc.

Seal Gaps & Finish Installation

Finally, once everything looks good, use caulk along the edges where needed to fill in small gaps between fiberglass paneling and surrounding frames. This will seal out air flow, preventing drafts from entering the home/building structure and preserving energy efficiency associated with properly fitting windows/doors etc. After caulking has dried completely, finish off the installation process by adding weather stripping around the perimeter if desired for maximum protection against outside elements such as wind, rain, snow and ice.

Installing fiberglass doors correctly is essential for long-term performance and durability. Now, let’s take a look at the maintenance tips to keep your door looking its best.

Key Takeaway: Installing fiberglass doors requires careful preparation and measurement, proper installation of hardware such as hinges, handles and locksets, hanging the door in place and sealing gaps with caulk. Weather stripping can also be added for extra protection against outside elements.

Tips for New Pre-hung Fiberglass Doors & Frames.

Installing an exterior prehung fiberglass door may seem like a daunting task, but with the right tools and instructions, it can be done easily. Follow the steps below to install your exterior prehung fiberglass door:

Tools and materials needed:

Step 1: Measure and prepare the opening

Measure the width and height of the opening to ensure that your exterior fiberglass door will fit properly. If the opening is too large, you will need to fill in the gap with additional framing. If it is too small, you will need to remove some framing to make it larger.

Step 2: Position the door

Position the prehung door in the opening and use shims to hold it in place. Ensure that the door is level, plumb, and square. Check the door jamb for any bows or twists, and adjust the shims as necessary to make the door fit snugly.

Step 3: Secure the door

Once the door is properly positioned, secure it in place by drilling pilot holes through the door jamb and into the framing of the house. Insert screws through the pilot holes to attach the door to the framing. Be sure to use exterior-grade screws that are long enough to go through the jamb and into the framing.

Step 4: Check for gaps

Check for any gaps between the door and the framing. Use shims to fill any gaps and ensure that the door is properly aligned.

Step 5: Install weatherstripping

Install weatherstripping around the edges of the door to prevent air leaks and improve energy efficiency.

Step 6: Apply caulking

Apply exterior caulking around the outside of the door to seal any gaps and prevent water from entering the house.

Step 7: Install the hardware

Install the doorknob, lockset, and any other hardware according to the manufacturer’s instructions. Check out the best smart locks for 2023 here!

Maintenance Tips for Fiberglass Doors

However, like any other door material, they require regular maintenance in order to keep them looking new and functioning properly over time. Here are some tips for maintaining your fiberglass door:

1. Clean Regularly:

Fiberglass doors should be cleaned regularly with a mild detergent or soap solution and a soft cloth or sponge. Avoid using abrasive cleaners as these can damage the finish of the door.

2. Inspect Door Seals:

Check the weatherstripping around your fiberglass door periodically for signs of wear or damage such as cracking, splitting, tearing, etc., which can lead to air leaks and drafts if not addressed promptly. Replace any worn out seals immediately with ones specifically designed for use on fiberglass doors in order to ensure an effective seal against air infiltration.

3. Lubricate Moving Parts:

Make sure that all moving parts such as hinges and locks are lubricated regularly with silicone-based lubricants in order to prevent sticking or binding when opening/closing the door or operating its hardware components (e.g., handles).

4. Paint Touch-Ups:

If you notice any scratches on your fiberglass door’s surface, you may want to consider doing touch-ups by applying paint that matches its original color exactly (or very closely). This will help maintain its aesthetic appeal while also protecting it from further damage caused by exposure to moisture and other elements over time (eg., UV rays).

Key Takeaway: Fiberglass doors require regular maintenance to ensure their durability and energy efficiency. This includes cleaning, inspecting door seals, lubricating moving parts, and touch-ups with paint.

FAQs in Relation to Best Fiberglass Doors

What are the disadvantages of fiberglass doors?

Fiberglass doors have many advantages, such as being strong and durable, but they also have some drawbacks. Fiberglass doors are more expensive than other door materials like wood or steel. They can also be prone to warping in extreme temperatures and require regular maintenance to keep them looking their best. Additionally, fiberglass is not a good insulator so it may not provide the same level of energy efficiency as other door materials.

Are fiberglass doors good quality?

Yes, fiberglass doors are a great quality option for homeowners, builders and architects. They offer superior insulation value compared to wood or steel doors, making them energy efficient and helping reduce heating costs. Fiberglass is also highly durable and can withstand extreme weather conditions without warping or rotting like wood does. Additionally, they come in a variety of styles so you can find the perfect door to fit your home’s aesthetic. Finally, fiberglass requires minimal maintenance which makes it an ideal choice for busy households.

How much is a good fiberglass door?

The cost of a good fiberglass door can vary depending on the size, style, and features you choose. Generally speaking, an entry-level fiberglass door will range from $500 to $1,000 while more premium options can reach up to $2,000 or more. For those looking for maximum durability and energy efficiency in their doors, investing in a higher quality option is recommended. Fiberglass doors are renowned for their strength and insulation capabilities which make them an ideal choice for homeowners who want long-term value from their investment.


In conclusion, fiberglass doors are a great choice for homeowners, builders and architects looking to improve the energy efficiency of their homes. They offer many advantages over traditional wood or steel doors, including better insulation and durability. When selecting the best fiberglass door for your home in 2023, be sure to consider the top 5 recommended options outlined above. With proper installation and maintenance tips followed, you can enjoy years of reliable performance from your new fiberglass door.

Are you looking for the best fiberglass doors in 2023? Look no further! Fiberglass is an incredibly durable and reliable material, making it perfect for any door. It’s low maintenance, energy efficient, resistant to rusting and cracking – not to mention stylish! We have identified five of the top recommended fiberglass doors that offer superior quality at a great price. Don’t wait – invest in one today and enjoy all the benefits that come with owning a high-quality fiberglass door.

Similar Posts