Should I choose a wood, steel or fiberglass door?

“What kind of door should I install? Wood, steel or a fiberglass door? What are the benefits of each?”

It’s a common question customers ask us. Usually, we recommend installing fiberglass replacement doors due to the versatility and performance advantages it has. Even after 25 years, a fiberglass door remains the most advanced material for entryways — able to satisfy both today’s and tomorrow’s homeowners by giving them the look of wood doors and the strength of steel doors, without the compromises of either. Fiberglass doors from Therma-Tru offer the optimum combination of security, energy efficiency, performance and aesthetics. But what are the advantages and disadvantages of each? Glad you asked!


Wood Replacement Door

Wood Door Replacement


Beautiful wood grain

High end appearance

Scratches are easily repaired

Warm feel and touch



Absorbs moisture

Can peel or bubble out

Prone to bowing, warping or twisting

Appearance will fade over time

Not energy-efficient

Requires regular maintenance

Steel Replacement Door

Steel Door Replacement


Less maintenance than wood doors

No cracking or bowing

Less expensive than wood


Good for insulation



Easily dented

Scratches can lead to rust

Paint chipping can occur

Conducts temperature; cold or hot to the touch


Therma-Tru Fiberglass Replacement Door

Fiberglass Door Replacement


Lowest maintenance

Resists denting and scratching

Offers wood grain appearance and smooth finish

Won’t rot, deteriorate or rust


Can be painted or stained

Won’t warp, bow or twist

Five times the insulation value of wood doors





For all these reasons, Winstal recommends installing a Therma-Tru fiberglass door when considering your options. They offer great performance, protection, and most of all, beauty!


Interested in a new fiberglass door installation?

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