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InternationalNFPA 285 Approved Wall Assemblies Containing Maximum 4 3/4″ Thick Kooltherm® Insulation
| Wall Component | Materials |
| Base Wall – Use 1, 2 or 3 | 1 – Cast Concrete Walls
2 – Concrete Masonry Wall 3 – 1 layer 5/8″-thick Type X gypsum wallboard on interior installed over steel studs: minimum 3 5/8″ depth, minimum 20-gague, spaced at a maximum of 24″ o.c. with lateral bracing every 4′ vertically. |
| Floorline Firestopping | 1 – 4 lb./cu ft. mineral wool in each stud cavity at each floor line, attached with Z-clips or equivalent. |
| Cavity Insulation – Use either 1, 2 or 3 | 1 – None
2 – Fiberglass batt or mineral wool insulation (faced or unfaced) 3 – Any noncombustible insulation (faced or unfaced) |
| Exterior Gypsum Sheathing Use either 1 or 2 | 1 – None; when base wall system #1 or #2 are used, sheathing is optional 2 – Minimum 5/8″-thick, Type X, exterior type gypsum sheathing |
| Weather-Resistive Barrier Applied Over Gypsum Use either 1, 2, 3, 4 or 5 | 1 – None
2 – W. R. MEADOWS AIR-SHIELD™ LMP (Gray) 3 – W. R. MEADOWS AIR-SHIELD LMP (Black) 4 – W. R. MEADOWS AIR-SHIELD TMP 5 – W. R. MEADOWS AIR-SHIELD LSR |
| Exterior Insulation | Kingspan Kooltherm K15, K8, K10 or K20 insulation – minimum 1″ (25 mm) thick to a maximum of 4 3/4″ (120 mm) thick. Standard silver aluminum, black coated aluminum, white coated aluminum, or glass tissue facers are all acceptable facing materials. |
| Sealing of Exterior Insulation | Optional; all exterior insulation joints and veneer tie penetrations sealed with acrylic, asphalt or butyl-based sealing tape – max. 4″ width. |
| Exterior Veneer
Use any of these options |
1. Brick
• Standard nominal 4″-thick, clay brick • Brick veneer anchors – standard types – installed maximum 24″ o.c. vertically on each stud • Maximum 2″ air gap between exterior insulation and brick 2 . Concrete • Minimum 2″ thick • Maximum 2″ air gap between exterior insulation and concrete • Any standard non-open joint technique may be used 3. CMU-concrete Masonry Units • Minimum 4″ thick • Maximum 2″ air gap between exterior insulation and CMU 4. Stone Veneer • Minimum 2″-thick limestone or natural stone veneer • Minimum 1 1/2″-thick cast artificial stone veneer • Any standard non-open joint technique may be used (such as shiplap, etc.) 5. Stucco • Minimum 3/4″-thick 2- or 3-coat stucco installed over lath |
| Flashing of window, door and other exterior wall penetrations | As an option, flash window, door and other exterior penetrations with limited amounts of acrylic, asphalt or butyl-based sealing tape, max. 12″ width.
As an option, Kooltherm Cavity Closure can be used to close wall cavities at openings. |
For more information regarding window detailing for NFPA 285 assemblies, please contact the manufacturer.
NFPA 285 Approved Wall Assemblies Containing Maximum 3″ Thick Kooltherm® Insulation
| Wall Component | Materials |
| Base Wall System – Use 1, 2 or 3 | 1 – Cast Concrete Walls
2 – Concrete Masonry Wall 3 – 1 layer 5/8″-thick Type X gypsum wallboard on interior installed over steel studs: minimum 3 5/8″ depth, minimum 20-gauge, spaced at a maximum of 24″ o.c. with lateral bracing every 4′ vertically. |
| Floorline Firestopping | 1 – 4 lb./cu ft. mineral wool in each stud cavity at each floor line, attached with Z-clips or equivalent. |
| Cavity Insulation – Use either 1, 2 or 3 | 1 – None
2 – Fiberglass batt or mineral wool insulation (faced or unfaced) 3 – Any noncombustible insulation (faced or unfaced) |
| Exterior Gypsum Sheathing Use either 1 or 2 | 1 – None (only allowed when base wall system #1 or #2 are used) 2 – 1/2″ or 5/8″-thick, Type X, exterior type gypsum sheathing |
| Weather-Resistive Barrier Applied Over Gypsum Sheathing
Use either 1, 2, 3, 4 or 5 |
1 – None
2 – W. R. MEADOWS AIR-SHIELD™ LMP (Gray) 3 – W. R. MEADOWS AIR-SHIELD LMP (Black) 4 – W. R. MEADOWS AIR-SHIELD TMP 5 – W. R. MEADOWS AIR-SHIELD LSR |
| Exterior Insulation | Kingspan Kooltherm K15, K8, K10 or K20 insulation – minimum 1″ (25 mm) thick to a maximum of 3″ (75 mm) thick. Standard silver aluminum, black coated aluminum, white coated aluminum, or glass tissue facers are all acceptable facing materials. |
| Sealing of Exterior Insulation | Optional; all exterior insulation joints and veneer tie penetrations sealed with acrylic, asphalt or butyl-based sealing tape – max. 4″ width. |
| Exterior Veneer
Use any of these options |
1. MCM Panel System
• Any metal composite material system that has been successfully tested by the panel manufacturer via the NFPA 285 test method. • Acceptable NFPA 285 testing shall consist of successful NFPA 285 test results on wall assembly incorporating a comparable thickness of combustible foam insulation behind the MCM. • MCM panels shall be maximum 4-mm thick 2. Steel, Aluminum or Copper Metal Exterior Wall Cladding • Aluminum cladding shall be minimum 0.080″ thick. • Steel cladding shall be minimum 0.0149″ thick; Copper cladding shall be minimum 0.0216″ thick. • Any standard installation technique may be used. • Also acceptable to install cladding using Knight Wall Rainscreen Attachment System 3. Fiber-Cement Siding (Noncombustible) • Minimum 1/4″ thick • Any standard installation technique with noncombustible furring can be used. • A maximum 1 1/2″ air gap allowed behind the fiber-cement siding. 4. Swisspearl Carat Panels • Minimum 0.315″ (8 mm) thick with closed or open joints (maximum 1/2″ joints when open). • Any standard installation technique using noncombustible furring can be used. • Maximum 1 1/2″ air gap allowed behind panels. |
| Wall Component | Materials |
| Exterior Veneer
Use any of these options |
5. Brick
• Standard nominal 4″-thick, clay brick • Brick veneer anchors – standard types – installed maximum 24″ o.c. vertically on each stud • Maximum 2″ air gap between exterior insulation and brick 6. Concrete • Minimum 2″ thick • Maximum 2″ air gap between exterior insulation and concrete • Any standard non-open joint technique may be used 7. CMU-concrete Masonry Units • Minimum 4″ thick • Maximum 2″ air gap between exterior insulation and CMU 8. Stone Veneer • Minimum 2″-thick limestone or natural stone veneer • Minimum 1 1/2″-thick cast artificial stone veneer • Any standard non-open joint technique may be used (such as shiplap, etc.) 9. Stucco • Minimum 3/4″-thick • 2- or 3-coat stucco installed over lath 10. Terracotta Cladding • Use any terracotta cladding system in which terracotta is minimum 1 1/4″ thick • Any standard joint installation technique such as ship-lap, etc. may be used. 11. EIFS • Henkel Polybit Industries Limited Ceresit EIFS – EIFS system consisting of Ceresit-CT 85 adhesive mortar and basecoat, Ceresit-CT 16 primer, and Ceresit-CT 60 finish coat. 12. Thin Brick • Minimum 3/4″ thick clay brick fully adhered with cementitious mortar (standard or polymer modified) to minimum 1/2″ 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. |
| Flashing of window, door and other exterior wall penetrations | As an option, flash window, door and other exterior penetrations with limited amounts of acrylic, asphalt or butyl-based sealing tape, max. 12″ width.
As an option, Koolthem Cavity Closure can be used to close wall cavities at openings. |
For more information regarding window detailing for NFPA 285 assemblies, please contact the manufacturer.
Information obtained from TER No. 1601-06 NFPA 285 Tested Wall Assemblies Using Kingspan Kooltherm Insulation Boards in Exterior Walls of Buildings of Type I-IV Construction
Issue Date: April 5, 2017
Updated: April 9, 2019
07-2020
Full NFPA testing documents are available. Please contact us to request these documents.