Flashing is thin pieces of impervious material installed to prevent the passage of water into a structure from a joint or as part of a weather resistant barrier system. Installing it incorrectly allows water to seep under your shingles and cause serious problems such as water damage, mold, and weakened structural integrity. Flashing closes the joints between the roof and the roof features in order to protect the house from erosion and leaking
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A lack of flashing or poor flashing installation can also lead to wood rot, potential shingle damage, or deck collapse, among other issues.
Roof flashing is a thin material, usually made from galvanized steel, aluminum, or copper, that professional roofers install around key areas of a roof
Its main job is to direct water away from spots where different parts of the roof meet, like chimneys, vents, and skylights. Flashing creates a watertight seal around roof penetrations and transitions, preventing leaks and protecting the underlying structure
