Per AISI S100, AISI S110, ASCE 8-02
All materials and engineering for framing are established methods of structural design, prescribed by the IBC.
- Structural cold-formed steel Studs designed per AISI S100
- Flat strap bracing or sheet metal shear walls Lateral-force-resisting system, designed per AISI S213
Per ICC ES ESR Evaluation Report 1006, IBC 603, 2603
ESR-1006 in section 2.1
- EPS foam approved as an exterior wall insulation product.
603.1 Allowable Materials.
- Foam Plastics in accordance with Chapter 26
2603.3 Surface-burning characteristics.
- Flame spread index of not more than 75
- Smoke-developed index of not more than 450 in
- accordance with ASTM E 84 or UL 723.
2603.4 Thermal barrier.
- Foam plastic shall be separated from the interior of a building by an approved thermal barrier of 1/2-inch (12.7 mm) gypsum wallboard.
- A minimum 7/8-inch (22.2 mm) thickness of stucco complying with Section 2510.
Acceptance Criteria for Cementitious Exterior Wall Coatings
ICC ES Report AC11
3.1.7 Foam Plastic Insulation:
- Foam plastic insulation shall comply with IBC Section 2603
- All foam plastic boards shall be nominal 1.5 pcf
- (24 kg/m 3) density
- Horizontal joints of foam plastic boards shall
- be tongue-and-groove with a minimum profile and
- thickness as shown below.
2012 IECC Insulation Requirements
The 2012 IECC residential codes:
- Insulation value of R-20 in wall, or R-13 in wall + R-5 of continuous insulation.
- Continuous insulation is defined as “insulation that is continuous across all structural members without thermal bridges other than fasteners (i.e. screws and nails) and service openings. Therefore, any penetrations through the insulation (including but not limited to studs, Z-girts, clips, etc) result in decreases to the nominal insulation R-value.”
Type IX EPS foam = R-4.8 per inch:
- 4 inches of EPS foam used in Epik Walls equals R-19.2.
- Two inches of that is a true continuous insulation with a value of R-9.6.
- Although not counted by the IECC, ASHRAE chapter 26 lists the relflective R-value of a dead air space when it is in the presence of a low-emittance radiant barrier. In climate zone 5 with horizontal heat flow, the 2 inches of reflective dead air space add another R-5 average to the insulation value.