Both fiberglass and steel are strong choices — but they serve different priorities. Your decision depends on style, budget, and long-term performance needs.
Both fiberglass and steel are strong choices — but they serve different priorities. Your decision depends on style, budget, and long-term performance needs.
Comparing the Two Materials
- Steel Door ROI — Steel doors deliver a 216% ROI, making them one of the highest-returning home improvements available. They’re durable and cost-effective.
- Fiberglass Appearance — Fiberglass doors replicate the look of real wood without the rot, warping, or ongoing maintenance that wood demands.
- Energy Performance — Both materials can carry Energy Star certification. Certified doors save up to 13% on heating and cooling costs nationwide.
- Durability — Steel resists denting better in lower-impact zones; fiberglass resists corrosion and moisture better in coastal and humid conditions.
- Cost Range — Steel doors average around $2,547 in New England. Premium fiberglass systems can reach $11,953 or more at the high end.
- Design Options — Both are available in the full Sherwin Williams color catalog with custom color matching. Neither limits your creative vision.
Top Recommendation: Fiberglass for Brookline’s older Victorians and Colonials — matches wood aesthetics without maintenance headaches.
Best for Budget: Steel doors offer the strongest ROI at an accessible price point.
Best for Curb Appeal: Premium fiberglass with wood grain texture and custom color from the Sherwin Williams catalog.
Not sure which direction fits your home? Coastal Windows & Exteriors offers free consultations for Brookline homeowners.
Request a free door estimate from Coastal Windows & Exteriors.
Browse our complete door FAQ guide from Coastal Windows & Exteriors.
Explore our door Exterior Remodeling Home Improvement Help Center.
Last Updated: April 2026
Sources:
- Steel entry doors deliver a 216% return on investment at resale. JLC Online Cost vs. Value Report, JLC Online’s national report detailing ROI for exterior door replacements by door type. (2026)
- ENERGY STAR certified doors can reduce heating and cooling costs by an average of up to 13% compared to non-certified products. ENERGY STAR Windows, Doors and Skylights, ENERGY STAR’s product guidance page on certified doors and their energy-saving performance. (Accessed April 2026)
- The average cost of a steel entry door in New England is $2,547. JLC Online Cost vs. Value 2025 New England, JLC Online’s regional Cost vs. Value Report with New England pricing for steel entry door installations. (2026)
- A grand fiberglass entry door is estimated to cost $11,953 in New England. JLC Online Cost vs. Value 2025 New England, JLC Online’s regional Cost vs. Value Report with New England pricing for fiberglass entry door installations. (2026)
