Coastal Windows & Exteriors is a woman-owned exterior remodeling company serving 730+ towns across Massachusetts, New Hampshire and Maine, with 7,000+ installations completed since 2011. A new front door can meaningfully lower energy bills, with ENERGY STAR certified doors cutting heating and cooling costs by up to 13%.
How Energy-Efficient Doors Cut Costs
- ENERGY STAR Certification: These doors can shrink energy bills by up to 13% compared to standard products.
- ComfortTech™ Warm Edge Glazing: This glazing system slows heat transfer through the glass panels.
- Polyurethane Foam Core: Dense foam insulation blocks drafts better than hollow door cores.
- Q-Lon Weatherstripping: Interlocking seals along the top and sides stop air leaks cold.
Best Energy-Efficient Door Options
Top Recommendation: ProVia fiberglass entry doors, the only line to win Energy Star Partner of the Year nine times.
Best for Budget: Steel entry doors, which still meet ENERGY STAR thresholds at a lower price point.
Best for Style: Custom fiberglass grand entry doors with matching sidelights and full glazing.
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Last Updated: August 2026
Sources:
- ENERGY STAR – Windows, Doors, and Skylights — ENERGY STAR’s official guidance on certified product energy savings. (Accessed July 2026)
