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EXTERIOR
WALLS - SECTION 1401 GENERAL
1401.1 Scope. The provision of this
chapter shall establish the minimum requirements
for exterior walls; exterior wall coverings; exterior
wall openings; exterior windows and doors; architectural
trim. Balconies and similar projections; and bay
and oriel windows.
EXTERIOR
WALLS - SECTION 1403 PERFORMANCE REQUIREMENTS
1403.2 Weather protection. Exterior
walls shall provide the building with a weather
resistant exterior wall envelope. The exterior
wall envelope shall include flashing, as described
in Section 1405.3. The exterior wall envelope shall be designed and constructed in such a manner
as to prevent the accumulation of water within
the wall assembly by providing a water-resistant
barrier behind the exterior veneer, as described
in Section 1404.2, and a means for draining water
that enters the assembly to the exterior. Protection
against condensation in the exterior wall assembly
shall be provided in accordance with Section 1405.3.
EXTERIOR
WALLS - SECTION 1404 MATERIALS
1404.2 Water-resistive barrier. A
minimum of one layer of No. 15 asphalt felt, complying
with ASTM D 226 for Type I felt or other approved materials, shall be attached to the studs or sheathing,
with flashing
as described in Section 1405.4, in such
a manner as to provide a continuous water-resistive
barrier behind the exterior wall veneer.
EXTERIOR
WALLS - SECTION 1405 INSTALLATION OF WALL COVERINGS
1405.4 Flashing. Flashing
shall be installed in such a manner as to prevent
moisture from entering the wall or to redirect
it to the exterior. Flashing shall be installed
at the perimeters of exterior door and
window assemblies, penetrations and terminations
of exterior wall assemblies,
exterior wall intersections with roofs,
chimneys, porches, decks balconies and similar
projections and at built-in-gutters and similar
locations where moisture could enter the wall.
Flashing with projecting flanges shall be installed
on both sides and the ends of copings, under sills
and continuously above the trim.
1405.4.1 Exterior wall pockets. In
exterior walls of buildings or structures, wall
pockets or crevices in which moisture can accumulate
shall be avoided or protected with caps or drips,
or other approved means to prevent water damage.
ROOF
ASSEMBLIES AND ROOFTOPS STRUCTURES - SECTION 1501
GENERAL
1501.1 Scope. The provisions of this
chapter shall govern the design, construction
and quality of roof assemblies, and rooftop structures.
ROOF
ASSEMBLIES AND ROOFTOPS STRUCTURES - SECTION 1503
WEATHER PROTECTION
1503.2 Flashing. Flashing
shall be installed in such a manner as to prevent
moisture entering the wall and roof through joints
in the copings, through moisture-permeable materials
and at intersections with parapet walls and other
penetrations
through the roof plane.
1503.2.1 Flashing/Locations.
Flashing shall be installed at wall and roof intersections;
at gutters; wherever there is a change
in roof slope or direction and around roof openings.
Where flashing is metal, the metal shall be corrosion
resistant with a thickness of not less than 0.019
inch (0.483mm) (No 26 galvanized sheet).
ROOF
ASSEMBLIES AND ROOFTOPS STRUCTURES - SECTION 1510
REROOFING
1510.6 Flashings. Flashings
shall be reconstructed in accordance with approved manufacturer's installation instructions.
Metal flashing to which bituminous materials are
to be adhered shall be primed prior to installation
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