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Any insulation assembly installed on the exterior of the foundation walls and on the perimeter of slabs-on-grade that permits water drainage shall:
  1. be made of water-resistant materials manufactured for that intended use;
  2. be installed according to the manufacturer's installation instructions;
  3. comply with either ASTM C578, C612, or Cl029, as applicable; and
  4. have a rigid, opaque, and weather-resistant protective covering to prevent the degradation of the insulation's thermal performance. The protective covering shall cover the exposed exterior insulation and extend a minimum of 6 inches (152 mm) below grade. The insulation and protective covering system shall be flashed in accordance with IRC Section R703.8 .

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