A well-sealed roof is essential for protecting your Maryland home from harsh weather, including heavy rain, snow, and strong winds. One of the most critical components of a watertight roof is flashing—the thin metal strips installed around roof penetrations (like chimneys, vents, and skylights) to prevent leaks. Over time, flashing can deteriorate, leading to costly water damage if not properly maintained.
Why Proper Flashing Sealing Matters in Maryland
Maryland’s climate can be tough on roofs. With:
- Freezing winters causing expansion and contraction
- Heavy rainfall testing waterproofing
- High humidity accelerating rust and corrosion
Faulty flashing can lead to:
- Water leaks damaging insulation and drywall
- Mold growth from trapped moisture
- Structural rot weakening roof decking
Steps to Seal Roof Flashing Like a Pro
1. Inspect the Flashing
Before sealing, check for:
- Loose or missing nails
- Rust or corrosion (common with older metal flashing)
- Gaps between flashing and roofing material
3. Apply Roofing Cement or Sealant
Use a high-quality elastomeric sealant like Henry’s 209 or Geocel 2320. Apply a generous bead along the edges of the flashing. Smooth with a putty knife for a watertight seal.
4. Reinforce with Flashing Tape (If Needed)
For extra protection, use peel-and-stick flashing tape over seams. GAF’s flashing guide recommends this for high-moisture areas like valleys.
When to Call a Professional
While DIY sealing can work for minor issues, consider hiring a licensed Maryland roofer if:
- The flashing is severely rusted or damaged
- You notice widespread leaks or rot
- The roof slope is steep or unsafe to work on
Final Thoughts
Properly sealed flashing is crucial for a durable, leak-free roof in Maryland’s ever-changing weather. For a professional inspection or complex repairs, contact our trusted local team.