Approved corrosion-resistant flashing required at windows/doors, chimney intersections, copings, sills, projecting trim, deck ledgers, wall/roof intersections, built-in gutters

Description

Approved corrosion-resistant flashing must be installed to prevent water entry at: (1) exterior window + door openings (head, sides, sill pan); (2) intersection of chimneys/masonry with frame or stucco walls; (3) under and at ends of masonry/wood/metal copings + sills; (4) continuously above all projecting wood trim; (5) deck/porch/stair attachments to wall or floor; (6) wall and roof intersections; (7) built-in gutters. Self-adhered membranes must comply with AAMA 711; fluid-applied with AAMA 714. Flashing must extend to the surface of the exterior finish.

Why this exists

Flashing failures are the #1 cause of envelope leaks. The window flashing detail (pan flashing at sill, AAMA 711/712/714 products at head + sides) is the single most important wall detail to draw. Architects should draw flashing in EVERY wall section, not leave it to the contractor's discretion.

Categories

Applies to

• Jurisdiction: New York State

Source

Solver enforcement

Browsable only — the solver does not currently enforce this directive (no spec-level data to check against). This entry exists so the architect personas can cite it in conversation and the user can read what the rule says.

Related directives

• Habitable space minimum ceiling height · IRC R305.1
• Wind design · IRC R301.2.1
• Seismic provisions · IRC R301.2.2
• Snow loads · IRC R301.2.3
• Floodplain construction · IRC R301.2.4