Inspect and Seal Your Roof Flashing
As Hawai‘i moves deeper into the rainy season, September is one of the most important months to prepare your home for heavy downpours. One critical but often overlooked step is inspecting and sealing your roof flashing.
Roof flashing is the thin, weather-resistant metal installed around vents, skylights, chimneys, valleys, and roof edges. Its job is simple but vital: to keep water out of the most vulnerable joints on your roof. In a climate like Hawai‘i—where sudden showers and weeks of rain are common—damaged or missing flashing can quickly lead to leaks, mold, and costly water damage inside your home.
1. Inspect for Gaps, Rust, or Loose Edges
Start with a visual inspection. Walk the perimeter of your home with binoculars or safely climb up (if you’re comfortable and experienced). Pay attention to:
Rust or corrosion – especially in coastal areas where salt air accelerates wear.
Lifted or bent flashing – wind and storms can cause edges to pull away.
Gaps or cracks – even small openings can let water seep in during a heavy Hawaiian rain.
Pro tip: don’t forget to check around skylights and roof valleys, two of the most common leak points.
2. Seal Small Gaps with Roofing Caulk
If you spot minor gaps or lifted edges, apply a high-quality roofing sealant or caulk designed for Hawai‘i’s humid, salty environment. This quick fix can extend the life of your flashing and prevent small issues from becoming full-blown leaks. Always follow manufacturer directions for application and curing time.
3. Call a Professional for Larger Issues
If your flashing is severely rusted, cracked, or missing altogether, don’t wait until the next storm. Contact a licensed Hawai‘i roofing contractor to repair or replace the damaged sections. Professional replacement ensures:
Correct installation with proper overlaps and fasteners.
Materials suited for Hawai‘i’s climate (galvanized steel, aluminum, or copper).
Long-term protection that’s backed by warranty.
Why Roof Flashing Maintenance Matters in Hawai‘i
Heavy rainfall: The islands’ wet season can bring weeks of rain, especially in windward areas.
High humidity: Moisture can seep into unprotected wood and insulation, leading to mold growth.
Salt air: Coastal homes are at greater risk of flashing corrosion, making annual inspections critical.
Property value: Preventive maintenance protects your investment and avoids surprise repair costs when selling your home.
Final Takeaway
By scheduling a roof flashing inspection every September, Hawai‘i homeowners can get ahead of the rainy season and avoid water intrusion problems. Whether you’re sealing small cracks yourself or hiring a roofing professional for bigger repairs, this simple maintenance step will safeguard your home from leaks, mold, and structural damage through the wettest months of the year.