Fiberglass vs. Steel Doors

Types of Glass Doors

Fiberglass vs. Steel Doors

Are you looking for a replacement front door? Are you seeking something unusual and unique? You’ve arrived at the correct location! We offer steel and fiberglass insulated entrance doors at Jancon Exteriors, and we frequently get queries regarding the differences. Both types of doors have advantages; regardless of which door you pick, you’ll get an elevated renovation grade product.

Let’s start by breaking out the key aspects of each door slab:

Steel Door Slab Specifications


  • Premium 24-gauge galvanized steel slab that has been factory pre-finished to avoid corrosion.
  • Insulation made of HCFC-free polyurethane foam
  • Slab stiles are manufactured of finger-jointed, pressure-treated, pre-finished wood with no knots and a 16″ lock block of Fiberglass (Master Grain). Features of the Door Slab:
  • Fiberglass skins with a nominal thickness of.09″ can be made to look like wood grain or have a smooth finish.
  • Embossments that are crisp and detailed
  • Insulation made of HCFC-free polyurethane foam
  • The doors have 4.125″ stiles on the sides, which are supported by 3.5″ of laminated strand timber.
  • Don’t rust or damage anything.
  • Steel and fiberglass door systems include frames and components that match or complement the door’s appearance.


Advantages of a fiberglass door over a steel door

The main advantage of a fiberglass door over a steel door is its ‘wood-like’ appearance. Fiberglass doors are frequently confused with wooden doors, but they are far more energy intensive and reliable with far less maintenance.

Steel doors are more susceptible to denting than fiberglass doors, which is another significant difference. A steel door will deform if kicked or struck with an item, however, a fiberglass door would not.

Although fiberglass doors provide more benefits, restoration grade steel doors are still a beautiful addition to your house and will last a long time if properly maintained. The majority of the door systems we sell at Jancon exterior are steel insulated systems, but demand for fiberglass doors is increasing.


Steel and fiberglass doors are pretty similar when it comes to insulation properties. The kind of look you would like to attain with your entrance should be considered as a final consideration. Steel or fiberglass may be the only way to achieve a particular look – sometimes not both. In such a situation, choosing which path to take is simple. While fiberglass doors have traditionally been more expensive, manufacturers now offer more competitive rates to close the gap. If you’ve considered fiberglass doors, now is the time to request a quote.


We’d love the opportunity to work with you if you’re looking for a new steel or fiberglass entrance system. Jancon Exteriors is proud to provide its siding services to a large portion of eastern Massachusetts. Your home’s siding is a critical foundation for keeping your house looking good, your family safe, and your energy costs low. We also replace doors in Walpole, Franklin, and Mansfield with Therma-Tru Doors’ top-of-the-line materials. We offer access to a wide range of designs and types of doors, including steel entry doors, fiberglass entrance doors, storm doors, and doors with decorative glass.