By Andre Charles
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September 8, 2025
Flashing may be small, but it’s your roof’s silent protector. When Connecticut homeowners ask, “What is flashing on a roof?” they’re really asking: how does my roof keep water out of the most vulnerable spots — valleys, chimneys, skylights, vents, and edges? The answer: roof flashing. It’s one of the most important defenses your roof has against leaks, yet it often goes unnoticed until a problem arises. At A1 Home Improvement , we’ve spent more than 30 years installing and repairing roofing systems across Connecticut. As an Owens Corning Platinum Preferred Contractor (top 1% nationwide), BBB-accredited , and trusted by 450+ homeowners , we’ve seen firsthand how proper flashing can be the difference between a watertight home and thousands in unexpected repairs. This guide explains what flashing is, how it works, the different types, and why professional installation and maintenance are critical for long-term protection.