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Roof Flashing

Roof flashing is formed material that directs water away from roof transitions, joints, edges, and penetrations.

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Flashing protects the weak points of a roof: walls, valleys, chimneys, skylights, pipes, edges, and system transitions.
Types

Types

The different forms and configurations this system takes.

Component

Step Flashing

Each piece of step flashing works with one course of roofing so water is directed onto the roof surface instead of behind the wall covering.

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Component

Valley Flashing

Valleys carry more water than most roof areas, so they need correct underlayment, metal or woven details, and clean drainage paths.

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Problems

Problems

Common failure modes, defects and associated hazards.

Problem

Flashing Failure

Flashing failures often appear as leaks near chimneys, walls, valleys, skylights, pipe boots, or roof edges rather than in the middle of a roof field.

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Case Studies

Case Studies

Real-world documented examples and documented cases.

Case Study

Sidewall Flashing Leak Case Study

The case illustrates why durable leak diagnosis follows water paths and rebuilds failed details instead of relying on surface sealant.

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Sources

  1. PRE Editorial Reference Standard — Professional Roofing Encyclopedia