Roof flashing is a thin metal barrier that seals joints and transitions where water is most likely to push through. It’s one of the most critical : and most overlooked : components of any roofing system.
Roof flashing is a thin metal barrier that seals joints and transitions where water is most likely to push through. It’s one of the most critical : and most overlooked : components of any roofing system.
What Flashing Does and Where It Lives
- Flashing Seals the Vulnerable Points : Every place your roof changes direction or meets a wall, chimney, skylight, or vent becomes a potential leak entry point. Flashing covers those transitions and channels water away from the structure.
- Where You’ll Find It : Common flashing locations include chimney bases, roof valleys, skylights, vent pipes, and side walls. Each one demands precise installation to hold its line.
- Poorly Installed Flashing Is a Top Cause of Leaks : Many roof leaks originate at flashing joints : not at the shingles. That’s especially true on Cohasset’s coastal Capes and historic Colonials with complex rooflines.
- Flashing Materials Matter : Quality flashing uses durable metals that resist corrosion and move with temperature changes. Massachusetts coastal conditions make that durability essential.
- Flashing Works With the Full System : Our layered GAF approach treats flashing as part of a complete waterproofing strategy : not an afterthought. Leak Barrier Protection and Roof Deck Protection work alongside flashing for full coverage.
- Inspect After Every Major Storm : Flashing can lift, crack, or separate over time. A post-storm inspection catches flashing issues early, before water reaches your interior ceiling.
- A Top Roofing Service Includes Flashing Assessment : Every Best Roofing Company in Cohasset, MA project we complete starts with a full review of existing flashing conditions before installation begins.
Flashing Recommendations for Cohasset Homeowners
Top Recommendation: Have flashing inspected any time your roof is over 15 years old or after a major storm : especially on homes with dormers or chimneys.
Best for Older Cohasset Homes: Full flashing replacement paired with a complete roof replacement for a fully integrated waterproofing system.
Best for Peace of Mind: Schedule a free inspection with our certified team to assess your roof’s current flashing condition.
Concerned about your roof’s flashing? Reach out to Coastal Windows & Exteriors for a free evaluation today.
- 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: April 2026
Sources:
- Asphalt shingles cost $4.46 per square foot on average nationally. Coastal Windows & Exteriors This Old House Roofing Facts and Statistics, roofing material cost data and industry statistics for homeowners. (2025)
