UNDER CONSTRUCTION:
Steel-frame Above Grade Walls with Foam Plastic Insulating Sheathing – Continuous Insulation

This part of the Design and Detailing guide is based on use of foam plastic insulating sheathing continuous insulation (FPIS-ci) on steek frame walls that comply with the locally applicable building code. It provides a methodical step-by-step design decision-making sequence to result in an efficient exterior steel frame wall assembly with FPIS-ci.  

Follow the steps in sequence or simply click on the step that applies to your specific need:

  • STEP 1 - Energy Code Compliance
    • Step 1A - 1 & 2 Family Dwellings
    • Step 1B - Commercial/Multi-family
  • STEP 2 - Fire Safety Code Compliance
    • Step 2A - 1 & 2 Family Dwellings
    • Step 2B - Commercial/Multi-family
  • STEP 3 - Moisture and Air Leakage Control Code Compliance 
    • 3A – Water-Resistive Barrier Strategy
    • 3B – Fenestration Installation and Flashing
    • 3C -  Water Vapor Diffusion & Drying Potential (Vapor Retarders & Insulation Ratios)
    • 3D – Air Barrier Strategy
  • STEP 4 - Cladding Connections
  • STEP 5 - Wind Resistance
  • STEP 6 - Wall Bracing Integration
  • STEP 7 - Mitigating Thermal Bridging at Assembly Interfaces
  • STEP 8 - Standard Detail Library for Construction Plans

Where “codes” are referred to in this guide, it should be taken to mean the locally adopted version of one of the following model codes unless otherwise indicated:

  • International Building Code (IBC)
  • International Residential Code (IRC)
  • International Energy Conservation Code (IECC)

The FPIS-ci materials addressed in this guide are:

  • EPS – expanded polystyrene per ASTM C578
  • XPS – extruded polystyrene per ASTM C578
  • PIC – polyisocyanurate per ASTM C1289

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