N.Y.C. Admin. Code § BC 1405: Section BC 1405: Installation of Wall Coverings

1405.1 General.

Exterior wall coverings shall be designed and constructed in accordance with the applicable provisions of this section. Installations not prescribed herein shall be permitted, provided that such alternative has been approved. Installations shall be in accordance with approved construction documents where a permit is required. Installations of exterior wall coverings shall comply with the special inspection requirements of Chapter 17.

1405.2 Weather protection.

The exterior wall envelope shall provide weather protection for the building. The materials of the minimum nominal thickness specified in Table 1405.2 shall be acceptable as approved weather coverings.

Exception: Weather coverings not meeting the minimum nominal thicknesses specified in Table 1405.2 shall be permitted provided such alternative has been approved.

Table 1405.2 Minimum Thickness of Weather Coverings

Covering Type

Minimum Thickness (inches)

Adhered masonry veneer*

0.25

Aluminum siding

0.019

Anchored masonry veneer

2.625

Asbestos-cement boards

0.125

Asbestos shingles

0.156

Cold-rolled copper

d

0.0216 nominal

Copper shingles

d

0.0162 nominal

Exterior plywood (with sheathing)

0.313

Exterior plywood (without sheathing)

See Section 2304.6

Fiber-cement lap siding

0.25

c

Fiber-cement panel siding

0.25

c

Fiberboard siding

0.5

Glass-fiber reinforced concrete panels

0.375

Hardboard siding

c

0.25

High-yield copper

d

0.0162 nominal

Lead-coated copper

d

0.0216 nominal

Lead-coated high-yield copper

0.0162 nominal

Marble slabs

1

Particleboard (with sheathing)

See Section 2304.6

Particleboard (without sheathing)

See Section 2304.6

Porcelain tile

0.25

Steel (approved corrosion resistant)

0.0149

Stone (cast artificial, anchored)

1.5

Stone (natural)

2

Structural glass

0.344

Stucco or exterior cement plaster

Three-coat work over:

Metal plaster base

0.875

b

Unit masonry

0.625

b

Cast-in-place or precast concrete

0.625

b

Two-coat work over:

Unit masonry

0.5

b

Cast-in-place or precast concrete

0.375

b

Terra cotta (anchored)

1

Terra cotta (adhered)

0.25

Vinyl siding

0.035

Wood shingles

0.375

Wood siding (without sheathing)

a

0.5

For SI: 1 inch = 25.4 mm, 1 ounce = 28.35 g, 1 square foot = 0.093 m

2

.

a. Wood siding of thicknesses less than 0.5 inch shall be placed over sheathing that conforms to Section 2304.6.

b. Exclusive of texture.

c. As measured at the bottom of decorative grooves.

d. 16 ounces per square foot for cold-rolled copper and lead-coated copper, 12 ounces per square foot for copper shingles, high-yield copper and lead-coated high-yield copper.

* Veneer units in this group shall be of an approved type and not be greater than 2 inches in thickness.

1405.3 Vapor retarders.

Vapor retarders as described in Section 1405.3.3 shall be provided based on an approved design using accepted engineering practice for hygrothermal analysis.

1405.3.1 Reserved.

1405.3.2 Reserved.

1405.3.3 Material vapor retarder class.

The vapor retarder class shall be based on the manufacturer's certified testing or a tested assembly. The following shall be deemed to meet the class specified:

Class I: Sheet polyethylene, non-perforated aluminum foil with a perm rating of less than or equal to 0.1.

Class II: Kraft-faced fiberglass batts or paint with a perm rating greater than 0.1 and less than or equal to 1.0.

Class III: Latex or enamel paint with a perm rating of greater than 1.0 and less than or equal to 10.0.

1405.3.4 Minimum clear airspaces and vented openings for vented cladding.

For the purposes of this section, vented cladding shall include the following minimum clear airspaces:

1. Vinyl lap or horizontal aluminum siding applied over a weather-resistive barrier as specified in this chapter.

2. Brick veneer with a clear airspace as specified in this code.

3. Other approved vented claddings.

1405.4 Flashing.

Flashing shall be installed in such a manner so as to prevent moisture from entering the wall or to redirect moisture to the exterior. Flashing shall be installed where required 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 projecting 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 shall be provided to prevent water damage.

1405.4.2 Masonry.

Flashing and weep holes in anchored veneer shall be located in the first course of masonry above finished ground level above the foundation wall or slab, and other points of support, including structural floors, shelf angles and lintels where anchored veneers are designed in accordance with Section 1405.6.

1405.5 Wood veneers.

Wood veneers on exterior walls of buildings of Type I, II, III and IV construction shall be not less than 1-inch (25.4 mm) nominal thickness, 0.438-inch (11.1 mm) exterior hardboard siding or 0.375-inch (9.5 mm) exterior-type wood structural panels or particleboard and shall conform to the following:

1. The veneer shall not exceed 40 feet (12190 mm) in height above grade. Where fire-retardant-treated wood is used, the height shall not exceed 60 feet (18290 mm) in height above grade.

2. The veneer is attached to or furred from a noncombustible backing that is fire-resistance rated as required by other provisions of this code.

3. Where open or spaced wood veneers (without concealed spaces) are used, they shall not project more than 24 inches (609.6 mm) from the building wall.

1405.6 Anchored masonry veneer.

Anchored masonry veneer shall comply with the provisions of Sections 1405.6, 1405.7, 1405.8 and 1405.9 and Sections 12.1 and 12.2 of TMS 402, as modified by Chapter 21 of this code.

1405.6.1 Tolerances.

Anchored masonry veneers in accordance with Chapter 14 are not required to meet the tolerances in Article 3.3 F1 of TMS 602.

1405.6.2 Seismic requirements.

Anchored masonry veneer located in Seismic Design Category C or D shall conform to the requirements of Section 12.2.2.10 of TMS 402, as modified by Chapter 21 of this code

1405.7 Stone veneer.

Anchored stone veneer units not exceeding 10 inches (254 mm) in thickness shall be anchored directly to masonry, concrete or to stud construction by one of the following methods:

1. With concrete or masonry backing, anchor ties shall be not less than 0.1055-inch (2.68 mm) corrosion-resistant wire, or approved equal, formed beyond the base of the backing. The legs of the loops shall be not less than 6 inches (152.4 mm) in length bent at right angles and laid in the mortar joint, and spaced so that the eyes or loops are 12 inches (304.8 mm) maximum on center in both directions. There shall be provided not less than a 0.1055-inch (2.68 mm) corrosion-resistant wire tie, or approved equal, threaded through the exposed loops for every 2 square feet (0.2 m

2

) of stone veneer. This tie shall be a loop having legs not less than 15 inches (381 mm) in length, so bent that the tie will lie in the stone veneer mortar joint. The last 2 inches (50.8 mm) of each wire leg shall have a right-angle bend. One-inch (25.4 mm) minimum thickness of cement grout shall be placed between the backing and the stone veneer.

2. With wood stud backing, a 2-inch by 2-inch (50.8 mm by 50.8 mm) 0.0625-inch (1.59 mm) zinc-coated or nonmetallic coated wire mesh with two layers of water-resistive barrier in accordance with Section 1404.2 shall be applied directly to wood studs spaced not more than 16 inches (406.4 mm) on center. On studs, the mesh shall be attached with 2-inch (50.8 mm) long corrosion-resistant steel wire furring nails at 4 inches (101.6 mm) on center providing a minimum 1.125-inch (28.58 mm) penetration into each stud and with 8d (0.120 in. diameter) annular threaded nails at 8 inches (203.2 mm) on center into top and bottom plates or with equivalent wire ties. There shall be not less than a 0.1055-inch (2.68 mm) zinc-coated or nonmetallic coated wire, or approved equal, attached to the stud with not smaller than an 8d (0.120 in. diameter) annular threaded nail for every 2 square feet (0.2 m

2

) of stone veneer. This tie shall be a loop having legs not less than 15 inches (381 mm) in length, so bent that the tie will lie in the stone veneer mortar joint. The last 2 inches (50.8 mm) of each wire leg shall have a right-angle bend. One-inch (25.4 mm) minimum thickness of cement grout shall be placed between the backing and the stone veneer.

3. With cold-formed steel stud backing, a 2-inch by 2-inch (50.8 mm by 50.8 mm) 0.0625-inch (1.59 mm) zinc-coated or nonmetallic coated wire mesh with two layers of water-resistive barrier in accordance with Section 1404.2 shall be applied directly to steel studs spaced at not more than 16 inches (406.4 mm) on center. The mesh shall be attached with corrosion-resistant #8 self-drilling, tapping screws at 4 inches (101.6 mm) on center, and at 8 inches (203.2 mm) on center into top and bottom tracks or with equivalent wire ties. Screws shall extend through the steel connection not fewer than three exposed threads. There shall be not less than a 0.1055-inch (2.68 mm) corrosion-resistant wire, or approved equal, attached to the stud with not smaller than a #8 self-drilling, tapping screw extending through the steel framing not fewer than three exposed threads for every 2 square feet (0.2 m

2

) of stone veneer. This tie shall be a loop having legs not less than 15 inches (381 mm) in length, so bent that the tie will lie in the stone veneer mortar joint. The last 2 inches (50.8 mm) of each wire leg shall have a right-angle bend. One inch (25.4 mm) minimum thickness of cement grout shall be placed between the backing and the stone veneer. The cold-formed steel framing members shall have a minimum bare steel thickness of 0.0428 inches (1.087 mm).

1405.8 Slab-type veneer.

Anchored slab-type veneer units not exceeding 2 inches (50.8 mm) in thickness shall be anchored directly to masonry, concrete or light-frame construction. For veneer units of marble, travertine, granite or other stone units of slab form, ties of corrosion-resistant dowels in drilled holes shall be located in the middle third of the edge of the units, spaced not more than 24 inches (609.6 mm) apart around the periphery of each unit with not less than four ties per veneer unit. Units shall not exceed 20 square feet (1.9 m

2

) in area. If the dowels are not tight fitting, the holes shall be drilled not more than 0.063 inch (1.6 mm) larger in diameter than the dowel, with the hole countersunk to a diameter and depth equal to twice the diameter of the dowel in order to provide a tight-fitting key of cement mortar at the dowel locations where the mortar in the joint has set. Veneer ties shall be corrosion-resistant metal capable of resisting, in tension or compression, a force equal to two times the weight of the attached veneer. If made of sheet metal, veneer ties shall be not smaller in area than 0.0336 by 1 inch (0.853 by 25.4 mm) or, if made of wire, not smaller in diameter than 0.1483-inch (3.76 mm) wire.

1405.9 Terra cotta.

Anchored terra cotta or ceramic units not less than 1 inch (25.4 mm) thick shall be anchored directly to masonry, concrete or stud construction. Terra cotta or ceramic unit anchorage shall be engineered to transfer loads to stable backup walls utilizing not less than two non-corrosive anchors per unit.

1405.10 Adhered masonry veneer.

Adhered masonry veneer shall comply with the applicable requirements in this section and Sections 12.1 and 12.3 of TMS 402, as modified by Chapter 21 of this code.

1405.10.1 Exterior adhered masonry veneer.

Exterior adhered masonry veneer shall be installed in accordance with the manufacturer's instructions and Section 1405.10.

1405.10.1.1 Water-resistive barriers.

Water-resistive barriers shall be installed as required in Section 2510.6.

1405.10.1.2 Flashing.

Flashing shall comply with this section and the applicable requirements of Section 1405.4.

1405.10.1.2.1 Flashing at foundation.

A corrosion-resistant screed or flashing of a minimum 0.019-inch (0.48 mm) or 26 gage galvanized or plastic with a minimum vertical attachment flange of 3 1/2 inches (88.9 mm) shall be installed to extend not less than 1 inch (25.4 mm) below the foundation plate line on exterior stud walls in accordance with Section 1405.4. The water-resistive barrier shall lap over the exterior of the attachment flange of the screed or flashing.

1405.10.1.3 Clearances.

On exterior stud walls, adhered masonry veneer shall be installed not less than 4 inches (101.6 mm) above the earth, or not less than 2 inches (50.8 mm) above paved areas, or not less than 1/2 inch (12.7 mm) above exterior walking surfaces that are supported by the same foundation that supports the exterior wall.

1405.10.1.4 Adhered masonry veneer installed with lath and mortar.

Exterior adhered masonry veneer installed with lath and mortar shall comply with the following.

1405.10.1.4.1 Lathing.

Lathing shall comply with the requirements of Section 2510.

1405.10.1.4.2 Scratch coat.

A nominal 1/2-inch (12.7 mm) thick layer of mortar complying with the material requirements of Sections 2103 and 2512.2 shall be applied, encapsulating the lathing. The surface of this mortar shall be scored horizontally, resulting in a scratch coat.

1405.10.1.4.3 Adhering veneer.

The masonry veneer units shall be adhered to the mortar scratch coat with a nominal 1/2-inch (12.7 mm) thick setting bed of mortar complying with Sections 2103 and 2512.2 applied to create a full setting bed for the back of the masonry veneer units. The masonry veneer units shall be worked into the setting bed resulting in a nominal 3/8-inch (9.5 mm) setting bed after the masonry veneer units are applied.

1405.10.1.5 Adhered masonry veneer applied directly to masonry and concrete.

Adhered masonry veneer applied directly to masonry or concrete shall comply with the applicable requirements of Section 1405.10, and with the requirements of Section 1405.10.1.4 or 2510.7.

1405.10.1.6 Cold weather construction.

Cold weather construction of adhered masonry veneer shall comply with the requirements of Sections 2104 and 2512.4.

1405.10.1.7 Hot weather construction.

Hot weather construction of adhered masonry veneer shall comply with the requirements of Section 2104.

1405.10.2 Exterior adhered masonry veneers – porcelain tile.

Adhered units shall not exceed 5/8 inch (15.8 mm) thickness and 24 inches (609.6 mm) in any face dimension nor more than 3 square feet (0.28 m

2

) in total face area and shall not weigh more than 9 pounds psf (0.43 kN/m

2

). Porcelain tile shall be adhered to an approved backing system.

1405.10.3 Interior adhered masonry veneers.

Interior adhered masonry veneers shall have a maximum weight of 20 psf (0.958 kg/m

2

) and shall be installed in accordance with Section 1405.10. The supporting members shall be designed to limit deflection to 1/600 of the span of the supporting members.

1405.11 Metal veneers.

Veneers of metal shall be fabricated from approved corrosion-resistant materials or shall be protected front and back with porcelain enamel, or otherwise be treated to render the metal resistant to corrosion. Such veneers shall be not less than 0.0149-inch (0.378 mm) nominal thickness sheet steel mounted on wood or metal furring strips or approved sheathing on light-frame construction.

1405.11.1 Attachment.

Exterior metal veneer shall be securely attached to the supporting masonry or framing members with corrosion-resistant fastenings, metal ties or by other approved devices or methods. The spacing of the fastenings or ties shall not exceed 24 inches (609.6 mm) either vertically or horizontally, but where units exceed 4 square feet (0.4 m

2

) in area there shall be not less than four attachments per unit. The metal attachments shall have a cross-sectional area not less than provided by W 1.7 wire. Such attachments and their supports shall be designed and constructed to resist the wind loads as specified in Section 1609 for components and cladding.

1405.11.2 Weather protection.

Metal supports for exterior metal veneer shall be protected by painting, galvanizing or by other approved coating or treatment. Wood studs, furring strips or other wood supports for exterior metal veneer shall be approved pressure-treated wood or protected as required in Section 1403.2. Joints and edges exposed to the weather shall be caulked with approved durable waterproofing material or by other approved means to prevent penetration of moisture.

1405.11.3 Backup.

Masonry backup shall not be required for metal veneer unless required by the fire-resistance requirements of this code.

1405.11.4 Grounding.

Grounding of metal veneers on buildings shall comply with the requirements of the New York City Electrical Code and Chapter 27 of this code.

1405.12 Thin exterior structural glass veneer.

The area of a single section of thin exterior structural glass veneer shall not exceed 10 square feet (0.93 m

2

) where that section is not more than 15 feet (4572 mm) above the level of the sidewalk or grade level directly below, and shall not exceed 6 square feet (0.56 m

2

) where it is more than 15 feet (4572 mm) above that level. In no event shall thin exterior structural glass veneer be installed more than 35 feet (10 668 mm) above the level of the sidewalk or grade level directly below.

1405.12.1 Length and height.

The length or height of any section of thin exterior structural glass veneer shall not exceed 48 inches (1220 mm).

1405.12.2 Thickness.

The thickness of thin exterior structural glass veneer shall be not less than 0.344 inch (8.7 mm).

1405.12.3 Application.

Thin exterior structural glass veneer shall be set only after backing is thoroughly dry and after application of an approved bond coat uniformly over the entire surface of the backing so as to effectively seal the surface. Glass shall be set in place with an approved mastic cement in sufficient quantity so that at least 50 percent of the area of each glass unit is directly bonded to the backing by mastic not less than 1/4 inch (6.4 mm) thick and not more than 5/8 inch (15.9 mm) thick. The bond coat and mastic shall be evaluated for compatibility and shall bond firmly together.

1405.12.4 Installation at sidewalk level.

Where thin exterior structural glass veneer extends to a sidewalk surface, each section shall rest in an approved metal molding, and be set at least 1/4 inch (6.4 mm) above the highest point of the sidewalk. The space between the molding and the sidewalk shall be thoroughly caulked and made water tight.

1405.12.4.1 Installation above sidewalk level.

Where thin exterior structural glass veneer is installed above the level of the top of a bulkhead facing, or at a level more than 36 inches (914.4 mm) above the sidewalk level, the mastic cement binding shall be supplemented with approved nonferrous metal shelf angles located in the horizontal joints in every course. Such shelf angles shall be not less than 0.0478 inch (1.2 mm) thick and not less than 2 inches (50.8 mm) long and shall be spaced at approved intervals, with not less than two angles for each glass unit. Shelf angles shall be secured to the wall or backing with expansion bolts, toggle bolts or by other approved methods.

1405.12.5 Joints.

Unless otherwise specifically approved by the commissioner, abutting edges of thin exterior structural glass veneer shall be ground square. Mitered joints shall not be used except where specifically approved for wide angles. Joints shall be uniformly buttered with an approved jointing compound and horizontal joints shall be held to not less than 0.063 inch (1.6 mm) by an approved nonrigid substance or device. Where thin exterior structural glass veneer abuts nonresilient material at sides or top, expansion joints not less than 1/4 inch (6.4 mm) wide shall be provided.

1405.12.6 Mechanical fastenings.

Thin exterior structural glass veneer installed above the level of the heads of show windows and veneer installed more than 12 feet (3657.6 mm) above sidewalk level shall, in addition to the mastic cement and shelf angles, be held in place by the use of fastenings at each vertical or horizontal edge, or at the four corners of each glass unit. Fastenings shall be secured to the wall or backing with expansion bolts, toggle bolts or by other methods. Fastenings shall be so designed as to hold the glass veneer in a vertical plane independent of the mastic cement. Shelf angles providing both support and fastenings shall be permitted.

1405.12.7 Flashing.

Exposed edges of thin exterior structural glass veneer shall be flashed with overlapping corrosion-resistant metal flashing or equivalent and caulked with a waterproof compound in a manner to effectively prevent the entrance of moisture between the glass veneer and the backing.

1405.13 Exterior windows and doors.

Windows and doors installed in exterior walls shall conform to the testing and performance requirements of Section 1709.5.

1405.13.1 Installation.

Windows and doors shall be installed in accordance with the manufacturer's instructions. Fastener size and spacing shall be provided in such instructions and shall be calculated based on maximum loads and spacing used in the tests.

1405.13.2 Windows in Group R-2 and R-3 occupancies.

Windows in Group R-2 and R-3 occupancies shall comply with Sections 1015.9 and 1015.8, respectively.

1405.13.3 Windows in R-2 Occupancy.

Windows in R-2 occupancy shall be subject to any applicable requirements of the New York City Department of Health and Mental Hygiene with regard to window guards.

1405.14 Vinyl siding.

Vinyl siding conforming to the requirements of this section and complying with ASTM D 3679 shall be permitted on exterior walls of buildings located in areas where the allowable stress design speed V

asd

, as determined in accordance with Section 1609.3.1, does not exceed 100 miles per hour (44.7 m/s) and the building height is less than or equal to 40 feet (12 192 mm) in Exposure C. Where construction is located in areas where the allowable stress design speed V

asd

, as determined in accordance with Section 1609.3.1, exceeds 100 miles per hour (44.7 m/s), or building heights are in excess of 40 feet (12 192 mm), tests or calculations showing compliance with Chapter 16 of this code shall be submitted. Vinyl siding shall be secured to the building so as to provide weather protection for the exterior walls of the building.

1405.14.1 Application.

The siding shall be applied over sheathing or materials listed in Section 2304.6. Siding shall be applied to conform to the water-resistive barrier requirements in Section 1403. Siding and accessories shall be installed in accordance with the manufacturer's instructions. Unless otherwise specified in the manufacturer's instructions, nails used to fasten the siding and accessories shall have a minimum 0.313-inch (7.9 mm) head diameter and 1/8-inch (3.18 mm) shank diameter. The nails shall be corrosion resistant and shall be long enough to penetrate the studs or nailing strip at least 3/4 inch (19.1 mm). For cold-formed steel light-frame construction, corrosion-resistant fasteners shall be used. Screw fasteners shall penetrate the cold-formed steel framing at least three exposed threads. Other fasteners shall be installed in accordance with the manufacturer's instructions. Where the siding is installed horizontally, the fastener spacing shall not exceed 16 inches (406.4 mm) horizontally and 12 inches (304.8 mm) vertically. Where the siding is installed vertically, the fastener spacing shall not exceed 12 inches (304.8 mm) horizontally and 12 inches (304.8 mm) vertically.

1405.15 Cement plaster.

Cement plaster applied to exterior walls shall conform to the requirements specified in Chapter 25.

1405.16 Fiber-cement siding.

Fiber-cement siding complying with Section 1404.10 shall be permitted on exterior walls of Type I, II, III, IV and V construction for wind pressure resistance or wind speed exposures as indicated by the manufacturer's listing and label and the installation instructions. Where specified, the siding shall be installed over sheathing or materials listed in Section 2304.6 and shall be installed to conform to the water-resistive barrier requirements in Section 1403. Siding and accessories shall be installed in accordance with the manufacturer's instructions. Unless otherwise specified in the the manufacturer's instructions, nails used to fasten the siding to wood studs shall be corrosion-resistant round head smooth shank and shall be long enough to penetrate the studs at least 1 inch (25.4 mm). For cold-formed steel light-frame construction, corrosion-resistant fasteners shall be used. Screw fasteners shall penetrate the cold-formed steel framing at least three exposed full threads. Other fasteners shall be installed in accordance with the manufacturer's instructions.

1405.16.1 Panel siding.

Fiber-cement panels shall comply with the requirements of ASTM C 1186, Type A, minimum Grade II or ISO 8336, Category A, minimum Class 2. Panels shall be installed with the long dimension either parallel or perpendicular to framing. Vertical and horizontal joints shall occur over framing members and shall be protected with sealant, battens or flashing. Alternatively, vertical or horizontal joints shall be shiplap or otherwise designed to comply with Section 1403.2 of this code. Panel siding shall be installed with fasteners in accordance with the manufacturer's instructions.

1405.16.2 Lap siding.

Fiber-cement lap siding having a maximum width of 12 inches (304.8 mm) shall comply with the requirements of ASTM C 1186, Type A, minimum Grade II or ISO 8336, Category A, minimum Class 2. Lap siding shall be lapped a minimum of 1 1/4 inches (32 mm) and lap siding not having tongue-and-groove end joints shall have the ends protected with caulking, covered with an H-section joint cover, located over a strip of flashing or shall be otherwise designed to comply with Section 1403.2 of this code. Lap siding courses shall be installed with the fastener heads exposed or concealed in accordance with the manufacturer's instructions.

1405.17 Fastening.

Weather boarding and wall coverings shall be securely fastened with aluminum, copper, zinc, zinc-coated or other approved corrosion-resistant fasteners in accordance with the nailing schedule in Table 2304.10.1 or the manufacturer's instructions. Shingles and other weather coverings shall be attached with appropriate standard-shingle nails to furring strips securely nailed to studs, or with approved mechanically bonding nails, except where sheathing is of wood not less than 1-inch (25.4 mm) nominal thickness or of wood structural panels as specified in Table 2308.6.3(3).

1405.18 Polypropylene siding.

Polypropylene siding conforming to the requirements of this section and complying with Section 1404.12 shall be limited to exterior walls of Type VB construction located in areas where the wind speed specified in Chapter 16 does not exceed 100 miles per hour (44.7 m/s) and the building height is less than or equal to 40 feet (12 192 mm) in Exposure C. Where construction is located in areas where the basic wind speed exceeds 100 miles per hour (44.7 m/s), or building heights are in excess of 40 feet (12 192 mm), tests or calculations showing compliance with Chapter 16 shall be submitted. Polypropylene siding shall be installed in accordance with the manufacturer's instructions. Polypropylene siding shall be secured to the building so as to provide weather protection for the exterior walls of the building.