Fiberglass, Steel and Wood Comparison

Wood Doors vs. Steel Doors vs. Fiberglass Doors

Even after 25 years, fiberglass 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. In fact, fiberglass doors offer just what homeowners want* — the optimum combination of security, energy efficiency, performance and aesthetics. Therma-Tru not only pioneered the fiberglass door category but we continue to lead the industry.

Wood Doors

Wood Comparison Thumbnail


Steel Doors

steel doors


Fiberglass Doors

fiberglass doors


Absorbs moisture

Can peel or bubble out

Can bow, warp or twist

Will fade

Not energy efficient

Requires regular maintenance


Easily dented

Scratches can lead to rust

Paint chipping can be common

Conducts temperature; cold or hot to the touch













Beautiful wood grain

High end look

Scratches easily repaired

Warm feel and touch

Lower maintenance

No cracking or bowing

Less expensive

Energy efficient

Good insulating value


Lowest maintenance

Resists denting and scratching

Offers wood grain and smooth finish look

Won’t rot, deteriorate or rust

Energy efficient

Can be painted or stained

Won’t warp, bow or twist

Five times the insulation value of wood


And don’t just take our word for it…

Below are links to publications that reinforce all the benefits of fiberglass doors over wood doors and steel doors.


* Therma-Tru qualitative research, August 2008

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