A roofing system combines multiple protective layers working together to shield your home from weather.
A roofing system combines multiple protective layers working together to shield your home from weather.
It includes shingles, underlayment, ventilation, leak barriers, starter strips, and ridge caps. GAF’s multi-layer approach provides comprehensive protection for Massachusetts, New Hampshire, and Maine homes.
What Every New England Homeowner Needs to Know:
- Shingle Layer — The visible top layer protects against weather while defining your home’s appearance. Asphalt shingles cost $4.46 per square foot on average and serve as the first defense against rain, snow, and UV damage.
- Leak Barriers — These watertight membranes install at high-risk areas like eaves, valleys, and chimneys to prevent leaks from wind-driven rain or ice dams. Critical protection given ice dam removal can cost up to $4,000 in New England.
- Synthetic Roof Deck Protection — This underlayment sits between the roof deck and shingles, providing a breathable layer that prevents moisture buildup. It protects the wooden deck from rot while offering secondary water protection if shingles fail.
- Starter Strip Shingles — Specialized shingles installed at roof edges provide a secure seal to prevent shingles from blowing off. These create wind resistance at the most vulnerable points of your roof system.
- Attic Ventilation — Components like ridge vents allow hot, moist air to escape from the attic. Proper ventilation regulates temperature, prevents mold, and stops ice dams from forming during harsh New England winters.
- Ridge Cap Shingles — Extra-thick shingles cover the peaks and hips of your roof. They provide a finished look and extra protection at the highest stress points of the structure.
GAF System Components Comparison:
| Component | Function | Protection Level | Maintenance |
| Lifetime Shingles | Weather barrier | Primary defense | Inspect twice yearly |
| Leak Barriers | Ice dam prevention | Critical for eaves | No maintenance needed |
| Ventilation | Temperature control | Extends system life | Clear debris annually |
| Roof Deck Protection | Secondary waterproofing | Backup protection | Installed once |
| Starter Strips | Wind resistance | Edge protection | Inspect with shingles |
| Ridge Caps | Peak protection | High-stress coverage | Check during inspections |
Top Choice: GAF’s complete 6-layer system for New England homes provides comprehensive protection against ice dams, wind-driven rain, and temperature extremes.
Best for Budget: Focus on quality shingles with proper ventilation first, then add leak barriers at vulnerable points during initial installation.
Best for Longevity: Install all six layers during initial installation—retrofitting components costs significantly more later and may void warranty coverage.
Ready to protect your home with a complete roofing system? Get a comprehensive roof inspection that evaluates all layers, not just surface shingles. Master Elite Roofer Coastal Windows & Exteriors has completed 7,000+ installations across Massachusetts, New Hampshire, and Maine as the only woman-owned GAF Master Elite contractor in the U.S.
Request a free roofing estimate from Coastal Windows & Exteriors.
Browse our complete roofing FAQ guide from Coastal Windows & Exteriors.
Explore our roofing Exterior Remodeling Home Improvement Help Center.
Last Updated: May 2026
Sources:
- Asphalt shingles average $4.46 per square foot, making them the most cost-accessible roofing material for New England homeowners. This Old House Roofing Facts and Statistics, This Old House’s data roundup on roofing material costs and industry benchmarks. (2025)
- Ice dam removal can cost up to $4,000, making leak barrier installation at eaves and other vulnerable areas a critical preventative investment for New England homes. Angi Ice Dam Removal Cost, Angi’s cost breakdown for ice dam removal and associated repair expenses. (2025)
- Leak barriers installed beneath shingles at the eaves and other high-risk areas prevent water from entering through the roof deck, particularly where ice dams form. GAF R-116 Ice Dams: Cause and Preventative Measures, GAF’s technical bulletin on ice dam formation and the protective role of leak barriers and ventilation systems. (2025)
- Proper attic ventilation allows warm, moist air to escape through ridge vents, regulating temperature, reducing condensation that leads to mold, and preventing the snow melt cycle that causes ice dams. GAF Best Roofing Materials and Colors for Energy Efficiency, GAF’s guidance on how continuous attic airflow supports energy efficiency and long-term roofing system performance. (2024)
