Page 403 - 2018_IRC

WALL COVERING

4. The water-resistive barrier shall comply with Sec- the instructions or test report without penetrating into
tion R703.2 or ASTM E2570. framing. Where the fastener penetrates fully through the
5. The water-resistive barrier shall be applied between sheathing, the end of the fastener shall extend a mini-
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the EIFS and the wall sheathing. mum of / inch (6.4 mm) beyond the opposite face of the
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6. Flashing of EIFS with drainage shall be provided in sheathing or nailable substrate.
accordance with the requirements of Section R703.4. R703.11.1.3 Spacing. Unless specified otherwise by
7. EIFS with drainage shall be installed in accordance the manufacturer’s instructions, the maximum spacing
with the manufacturer’s instructions. between fasteners for horizontal siding shall be 16
inches (406 mm), and for vertical siding 12 inches (305
8. EIFS with drainage shall terminate not less than 6 mm) both horizontally and vertically. Where specified
inches (152 mm) above the finished ground level. by the manufacturer’s instructions and supported by a
9. Decorative trim shall not be face-nailed through the test report, greater fastener spacing is permitted.
EIFS with drainage. R703.11.2 Installation over foam plastic sheathing. *
R703.10 Fiber cement siding. Where vinyl siding or insulated vinyl siding is installed
over foam plastic sheathing, the vinyl siding shall comply
R703.10.1 Panel siding. Fiber-cement panels shall comply
with the requirements of ASTM C1186, Type A, minimum with Section R703.11 and shall have a design wind pres-
Grade II or ISO 8336, Category A, minimum Class 2. Pan- sure resistance in accordance with Table R703.11.2.
els shall be installed with the long dimension either parallel Exceptions:
or perpendicular to framing. Vertical and horizontal joints 1. Where the foam plastic sheathing is applied
shall occur over framing members and shall be protected directly over wood structural panels, fiberboard,
with caulking, or with battens or flashing, or be vertical or gypsum sheathing or other approved backing
horizontal shiplap, or otherwise designed to comply with capable of independently resisting the design
Section R703.1. Panel siding shall be installed with fasten- wind pressure, the vinyl siding shall be installed
ers in accordance with Table R703.3(1) or the approved in accordance with Sections R703.3.3 and
manufacturer’s instructions. R703.11.1.
R703.10.2 Lap siding. Fiber-cement lap siding having a 2. Where the vinyl siding manufacturer’s product
maximum width of 12 inches (305 mm) shall comply with specifications provide an approved design wind
the requirements of ASTM C1186, Type A, minimum pressure rating for installation over foam plastic
Grade II or ISO 8336, Category A, minimum Class 2. Lap sheathing, use of this design wind pressure rating
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siding shall be lapped a minimum of 1 / inches (32 mm) shall be permitted and the siding shall be installed
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and lap siding not having tongue-and-groove end joints in accordance with the manufacturer’s installa-
shall have the ends protected with caulking, covered with tion instructions.
an H-section joint cover, located over a strip of flashing, or
shall be designed to comply with Section R703.1. Lap sid- 3. Where the foam plastic sheathing and its attach-
ing courses shall be installed with the fastener heads ment have a design wind pressure resistance
exposed or concealed, in accordance with Table R703.3(1) complying with Sections R316.8 and R301.2.1,
or approved manufacturer’s instructions. the vinyl siding shall be installed in accordance
with Sections R703.3.3 and R703.11.1.
R703.11 Vinyl siding. Vinyl siding shall be certified and
labeled as conforming to the requirements of ASTM D3679 R703.12 Adhered masonry veneer installation. Adhered
by an approved quality control agency. masonry veneer shall comply with the requirements of Section
R703.7.3 and the requirements in Sections 12.1 and 12.3 of
R703.11.1 Installation. Vinyl siding, soffit and accesso- TMS 402. Adhered masonry veneer shall be installed in accor-
ries shall be installed in accordance with the manufac- dance with Section R703.7.1, Article 3.3C of TMS 602 or the
turer’s instructions. manufacturer’s instructions.
R703.11.1.1 Fasteners. Unless specified otherwise by R703.12.1 Clearances. On exterior stud walls, adhered
the manufacturer’s instructions, fasteners for vinyl sid- masonry veneer shall be installed:
ing shall be 0.120-inch (3 mm) shank diameter nail
with a 0.313-inch (8 mm) head or 16-gage staple with a 1. Minimum of 4 inches (102 mm) above the earth;
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3 / -inch (9.5 mm) to / -inch (12.7 mm) crown. 2. Minimum of 2 inches (51 mm) above paved areas; or
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R703.11.1.2 Penetration depth. Unless specified oth- 3. Minimum of / inch (12.7 mm) above exterior walk-
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erwise by the manufacturer’s instructions, fasteners ing surfaces that are supported by the same founda-
shall penetrate into building framing. The total penetra- tion that supports the exterior wall.
tion into sheathing, furring framing or other nailable R703.12.2 Flashing at foundation. A corrosion-resistant
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substrate shall be a minimum 1 / inches (32 mm). screed or flashing of a minimum 0.019-inch (0.48 mm) or
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Where specified by the manufacturer’s instructions and 26-gage galvanized or plastic with a minimum vertical
supported by a test report, fasteners are permitted to pen- attachment flange of 3 / inches (89 mm) shall be installed
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etrate into or fully through nailable sheathing or other to extend a minimum of 1 inch (25 mm) below the founda-
nailable substrate of minimum thickness specified by
378 2018 INTERNATIONAL RESIDENTIAL CODE ®
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