The majority of residential roof leaks are caused by compromised flashing details around roof penetrations, worn-out roofing materials, and clogged drainage systems. Specifically, deteriorating metal flashing around chimneys, skylights, and plumbing vent pipes accounts for a high percentage of leaks because sealant degrades under UV exposure. Other leading causes include missing or cracked asphalt shingles due to age or windstorms, clogged roof valleys, and blocked gutters that force water under eaves. You can troubleshoot roof vulnerabilities safely by performing biannual inspections. You can verify that your corrective action is successful when replacing damaged flashing, clearing gutters, and installing new shingles eliminates vulnerable gaps and keeps your attic completely dry during heavy storms.
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