620 LAUREL DR 2025-04-16 - Laserfiche WebLink

qq E g • - 565 o Originally Issued: 03/08/2018 Revised: 05/03/2021 Valid Through: 03/31/2022 accordance with IBC Section 2603.4.1.6 or IRC Sections 4.6 Air Permeability: When tested in accordance with R316.5.3 and R316.5.4,as applicable. ASTM E2178 at a minimum thickness of 1 inch(25.4 mm), Heatlok® HFO Pro spray foam insulation is classified as Exception: The prescriptive ignition barrier may air-impermeable insulation in accordance with Section be omitted when installed in accordance with 1202.3 of the 2018 IBC, Section 1203.3 of the 2015 IBC, Section 4.5.2.2 of this report. and Section R806.5 of the 2018, 2015 and 2012 IRC or Section R806.4 of the 2009 IRC,as applicable. 4.5.2.2 Installation Using an Alternative Ignition Barrier Assembly: Heatlok® UFO Pro spray-applied 4.7 Vapor Permeance: Heatlok® HFO Pro spray-applied polyurethane foam plastic insulation may be installed in polyurethane foam plastic insulation, when tested in attics and crawl spaces using an alternative ignition barrier accordance with the ASTM E96 desiccant method assembly provided: (Procedure A), has a permeance of less than 1.0 perms a. Entry is only to service utilities in the attic or (57.4 x 101 g/Pa•s•m),at a minimum thickness of 1 inch(25 crawl space and no storage is permitted. mm) and qualifies as a Class 11 vapor retarder in b. Attic or crawl space areas cannot be accordance with IBC Section 202 and IRC Section R202. interconnected. 4.8 One-hour fire-resistance rated assembly: The c. Air from the attic or crawl space cannot be following load-bearing assembly based on testing to circulated to other parts of the building. ASTM El 19 provides a one-hour fire-resistance rating. d. Attic ventilation is provided as required by 2018 IBC Section 1202.2, 2015 and 2012 IBC Section Framing: 35/8-inch (92 mm) 20-gauge steel studs with a 1203.2 or IRC Section R806 except where air- maximum height of 10 feet(3 m)spaced at 16 inches(406 impermeable insulation is permitted in unvented mm)on center inserted in a 20-gauge top and bottom steel attics and shall comply with the following code sections as applicable: track with lateral bracing at mid-wall height. For Unvented Attics: Exterior Surface: Two layers Of'/8-inch-thick (15.9 mm) glass mat gypsum substrate complying with ASTM C 1177. • 2018 IBC Section 1202.3 The base layer is installed with the long edge parallel to the • 2015 IBC Section 1203.3 studs with #6 by 11/2-inch-long (38 mm) drywall screws • 2018,2015,2012 and 2009 IRC Section spaced at 8 inches(203 mm)on center around the perimeter R806.5 and 12 inches (305 mm) on center in the field. The face layer is installed with the long edge parallel to the studs Crawl space ventilation is provided as required by with the base layer and face layer joints staggered by one the following code sections as applicable: stud space. The face wall is secured with#6 by 1 /8-inch- long(48 mm)drywall screws spaced at 8 inches(203 mm) • 2018 IBC Section 1202.4 on center around the perimeter and 12 inches(305 mm)on • 2015 IBC Section 1203.4 center in the field. • 2012 and 2009 IBC Section 1203.3 • 2018,2015,2012 and 2009 IRC Section Insulation: 35/8-inch-thick(92 mm)layer of Heatlok®HFO R408.1 Pro spray-applied polyurethane foam plastic insulation applied in the cavities to the exterior gypsum completely e. The foam plastic insulation is limited to the filling the stud cavities. maximum thickness and density tested as shown Interior Cladding: Two layers of 5/8-inch-thick(15.9 mm) in Section 4.5.2.2.1 of this report. Type X gypsum board complying with ASTM C 1396. The f. In accordance with IMC (International Mechanical Code®) Section 701, combustion air base layer shall be installed with the long edge parallel to is provided. the studs with#6 by 1 /2-inch-long(38 mm)drywall screws spaced at 8 inches(203 mm)on center around the perimeter 4.5.2.2.1 Alternative Ignition Barrier Assembly: and 12 inches (305 mm) on center in the field. The face Heatlok® HFO Pro spray-applied polyurethane foam layer shall be installed with the long edge parallel to the plastic insulation may be installed without a prescriptive studs with the base layer and face layer joints staggered by ignition barrier on walls, floors, ceilings and other vertical one stud space. The face wall is secured with#6 by 1 /B- and horizontal surfaces as defined in Section 4.5.2.1 of this inch-long(48 mm)drywall screws spaced at 8 inches(203 report when limited to a maximum thickness of 7.5 inches mm) on center around the perimeter and 12 inches (305 (191 mm) on walls and other vertical surfaces and 11.5 mm)on center in the field. inches(292 mm)on ceilings and other overhead surfaces. 4.9 Exterior Walls of Buildings of Type I,II,III or IV Construction: When Heatlok® HFO Pro spray-applied polyurethane foam plastic insulation is used in exterior Page 3 of 7