Table 1 – Base Wall Assemblies | |
Wall Component | Materials |
Base wall system – Use either 1, 2, 3, 4 or 5 | 1 – Concrete wall
2 – Concrete Masonry wall 3 – Standard clay brick wall 4 – Adobe block wall 5 – Steel studs: minimum 3⅝-inch depth, minimum 20-gauge at a maximum of 24-inch OC with lateral bracing every 4 ft. vertically with: a) One layer – ⅝-inch thick Type X or ½-inch thick Type X Gypsum wallboard on interior face of studs, or b) W.R. Grace’s Monokote Z-3306 installed at a minimum of 3/8 inch thickness over TUFF-R™ci, or c) Isolatek International’s CAFCO – TB 415 installed at a minimum of 3/8 inch thickness over TUFF-R™ci, or d) International Cellulose Corporation’s Ure-K Thermal Barrier System installed at a minimum of 1.25 inch thickness over TUFF-R™ci. e) Specialty Products, Inc. Flame Seal-TB coating applied at a wet mil thickness of 25 mils (18 mils dry, 65 ft²/gal) over TUFF-R™ci f) International Fireproof Technology, Inc. DC 315 applied at an application rate of 18 wet mils applied over 4 mils of primer which is applied over TUFF-R™ci |
Floorline Firestopping | 4 lb/cu ft. mineral wool (e.g. Thermafiber) in each stud cavity and at each floorline – attached with Z-clips or equivalent |
Cavity Insulation – Use either 1, 2 or 3 | 1 – None
2 – Mineral wool insulation (faced or unfaced) 3 – Fiberglass batt insulation (faced or unfaced) |
Exterior sheathing – Use either 1, 2, 3 or 4 | 1 – None
2 – 1/2-inch thick, exterior type gypsum sheathing 3 – 5/8-inch thick, exterior type gypsum sheathing 4 – 5/8-inch thick DensElement™ sheathing – The joints of the DensElement™ sheathing may be sealed with R-Guard® FastFlash® Liquid Flashing or approved equivalent. |
Weather-resistive barrier applied to gypsum sheathing – Use either 1 or 2 | 1 – None
2 – W. R. MEADOWS AIR-SHIELD™ LMP (Gray) W. R. MEADOWS AIR-SHIELD LMP (Black) W. R. MEADOWS AIR-SHIELD TMP W. R. MEADOWS AIR-SHIELD LMP |
Remainder of wall | See Table 2 |
Table 2 – Walls with a Maximum of 3.2-inch Thick TUFF-R™ci | |
Wall Component | Materials |
Exterior insulation – | Dow TUFF-R™ci Insulation – Total thickness to be a minimum of ⅝ inch to maximum of 3.2 inches |
Flashing | Flash all exterior insulation joints and veneer tie penetrations with one of the following:
1 – Dow LIQUIDARMOR™ – CM Flashing and Sealant – max. 60-mil wet thickness, max. 5-inch width 2 – Dow LIQUIDARMOR™ – LT Flashing and Sealant – max 35-mil wet thickness, max 5-inch width 3 – Dow WeatherMate™ Flashing – max. 4-inch width 4 – Asphalt, acrylic, or butyl-based flashing tape – max. 4-inch width 5 – Dow Great Stuff Pro™ – Use on joints that are ≤ 1/4-inch, vertical joints must be staggered & remove significant excess from the face of the TUFF-R™ci Note: With either 3 or 4, a small amount of spray primer may be used in aid in adhesion; maximum 5-inch width. |
Exterior Veneer – Use either 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 or 16 | 1 – MCM System – Use any Metal Composite Material system that has been successfully tested by the panel manufacturer via the NFPA 285 test method. Any standard installation technique can be used. MCM panel systems such as:
• CEI Composites R4000 System using Reynobond® FR ACM or Alpolic® FR ACM. 2 – Terracotta cladding – Use any terracotta cladding system in which terracotta is minimum 1-1/4 inch thick. Any standard installation technique can be used. Exterior insulation may be covered with a water-resistive barrier listed in Table 3 if a non-open-joint installation techniques such as ship-lap, etc. is used. 3 – Metal exterior wall coverings such as steel, aluminum, copper, zinc, etc. Any standard installation technique can be used. 4 – Fiber-cement siding – minimum 1/4-inch thick. Any standard installation technique can be used. A maximum 1 1/2-inch air gap allowed behind the fiber-cement siding. 5 – Brick – Standard nominal 4-inch thick, clay brick with brick veneer anchors – standard types – installed maximum 24 inches OC vertically on each stud. Maximum 2-inch air gap between exterior insulation and brick. Exterior insulation may be covered with a water-resistive barrier listed in Table 4. 6 – Stucco – Minimum ¾-inch thick, exterior cement plaster and lath. A secondary water-resistive barrier can be installed between the Exterior insulation and the lath. The secondary water-resistive barrier shall not be full-coverage asphalt or butyl-based self-adhered membranes. Exterior insulation may be covered with a water-resistive barrier listed in Table 3. 7 – Corium™ Thin brick system. 8 – Minimum 1¼-inch thick, Limestone or natural stone veneer or minimum 1¼ inch thick cast artificial stone veneer. Any standard installation technique such as ship-lap, etc. can be used. Exterior insulation may be covered with a water-resistive barrier listed in Table 4 if a minimum of 2-inch thickness of Limestone or natural stone veneer or minimum 1½-inch thick cast artificial stone veneer is used. 9 – StoneLite natural stone wall panels by Stone Panels, Inc. 10 – Glen-Gery Thin Tech Elite Series – Masonry veneer 11 – Concrete or precast concrete panels – Minimum 1.5-inch thick panel, with a 2-inch maximum air gap between exterior insulation and concrete panel. Any standard installation technique can be used. Exterior insulation may be covered with a water-resistive barrier listed in Table 3 if a non-open-joint installation techniques such as ship-lap, etc. is used. |
Table 2 – Walls with a Maximum of 3.2-inch Thick TUFF-R™ci (Cont.) | |
12 – Ceramic tile (min. 3/8-in. thick) bonded using noncombustible mortar adhesive to minimum ½-in. thick cement board or gypsum sheathing.
13 – Thin brick (min. ¾-inch thick clay brick) fully adhered with cementitious mortar (standard or polymer modified) to min. ½-inch thick cement backer board or gypsum sheathing. A secondary water-resistive barrier can be installed between the board/sheathing and the brick. The secondary water-resistive barrier shall not be full-coverage asphalt or butyl-based self-adhered membranes. 14 – Natural stone or artificial stone (min. 3/4-inch thick clay brick) fully adhered with cementitious mortar (standard or polymer modified) to min. 1/2-inch thick cement backer board or gypsum sheathing. A secondary water-resistive barrier can be installed between the board/sheathing and the stone. The secondary water-resistive barrier shall not be full-coverage asphalt or butyl-based self- adhered membranes 15 – Knight Wall Systems to include: • MCM System – Use any Metal Composite Material system that has been successfully tested by the panel manufacturer via the NFPA 285 test method. Any standard installation technique can be used. MCM panel systems such as: • CEI Composites R4000 System using Reynobond® FR ACM or Alpolic® FR ACM. • Terracotta cladding – Use any terracotta cladding system in which terracotta is minimum 1-1/4 inch thick. Any standard installation technique can be used. • Metal exterior wall panels or coverings such as steel, aluminum, copper, zinc etc. Any standard installation technique can be used. • Brick – Standard nominal 4-inch thick, clay brick with brick veneer anchors – standard types – installed maximum 24 inches OC vertically on each stud. Maximum 2-inch air gap between exterior insulation and brick. • Stucco – Minimum ¾-inch thick, exterior cement plaster and lath attached to minimum ½-inch thick backer board. A secondary water-resistive barrier can be installed between the exterior sheathing and the lath. The secondary water-resistive barrier shall not be full-coverage asphalt or butyl-based self-adhered membranes. • Corium™ Thin brick system. • Minimum 1¼-inch thick, Limestone or natural stone veneer or minimum 1¼ inch thick cast artificial stone veneer. Any standard installation technique such as ship-lap, etc. can be used. • StoneLite natural stone wall panels by Stone Panels, Inc. • Glen-Gery Thin Tech Elite Series – Masonry veneer • Concrete or precast concrete panels – Minimum 1.5-inch thick panel, with a 2inch maximum air gap between exterior insulation and concrete panel. Any standard installation technique can be used. • Ceramic tile (min. 3/8-in. thick) bonded using noncombustible mortar adhesive to minimum ½-in. thick cement board or gypsum sheathing. • Thin brick (min. ¾-inch thick clay brick) fully adhered with cementitious mortar (standard or polymer modified) to min. ½-inch thick cement backer board or gypsum sheathing. A secondary water-resistive barrier can be installed between the exterior sheathing and the brick. The secondary water-resistive barrier shall not be full-coverage asphalt or butyl-based self-adhered membranes. |
Table 2 – Walls with a Maximum of 3.2-inch Thick TUFF-R™ci (Cont.) | |
• Natural stone or artificial stone (min. ¾-inch thick clay brick) fully adhered with cementitious mortar (standard or polymer modified) to min.
½-inch thick cement backer board or gypsum sheathing. A secondary water-resistive barrier can be installed between the exterior/sheathing and the stone. The secondary water-resistive barrier shall not be full-coverage asphalt or butyl-based self-adhered membranes 16 – NCI Building Group to include: •PBR Panel (Exposed fasteners) •PBU Panel (Exposed fasteners) •Panel (Exposed fasteners) •Designer™ Series Panels (Exposed fasteners) •ShadowRib™ Panels (Exposed fasteners) •NuWall® Panels (Exposed fasteners) •MasterLine 16 (Concealed fasteners) |
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Flashing of window, door and other exterior wall penetrations | As an option, flash window, door and other exterior penetrations with either:
a) Dow LIQUIDARMOR™ – CM Flashing and Sealant – max. 60-mil wet thickness, max. 12inch width. b) Dow LIQUIDARMOR™ – LT Flashing and Sealant – max. 35-mil wet thickness, max. 12-inch width. c) Limited amounts of acrylic, asphalt or butyl-based flashing tape – max. 12-inch width. Note: Flashing tape used in wall openings may extend the wall width plus extend up to a maximum of 4-inches onto the exterior face of the sheathing. Flashing tape may be used on sheathing exterior corners where the flashing tape may extend a maximum of 4-inches onto the sheathing face on either side of the corner. |
Table 3 – Allowed Water-resistive Barriers Installed Over Foam Insulation |
DOW Chemical –
• WeatherMate™ • WeatherMate™ Plus |
DuPont –
• Tyvek® CommercialWrap® • DuPont™ Tyvek® CommercialWrap® • DuPont™ Tyvek® CommercialWrap® D • DuPont™ Tyvek® ThermaWrap™ |
Kingspan –
• Kingspan® GreenGuard® Max™ Building Wrap • Kingspan® GreenGuard® Classic Building Wrap • Kingspan® GreenGuard® C2000 Building Wrap • Kingspan® GreenGuard® Raindrop® 3D Building Wrap • Kingspan® GreenGuard® HPW™ Building Wrap |
VaproShield –
• RevealShield™ • RevealShield SA™ |
Note: all barriers to be installed at indicated or recommended application rates and per manufacturer’s installation instructions.
Information obtained from Jensen Hughes Various NFPA 285 Complying Exterior Wall Constructions – Dow TUFF-R™ci Project #1JJB05306.011 – March 31, 2017
06-2020
Full NFPA testing documents are available. Please contact us to request these documents.