Extended Plate and Beam Wall System: Concept Investigation and Initial Evaluation

Stacey Rothgeb, V. Kochkin, J. Wiehagen, Stacey Rothgeb (NREL Technical Monitor)

Research output: NRELSubcontract Report


A new and innovative High-R wall design, referred to as the Extended Plate & Beam (EP&B), is under development. The EP&B system uniquely integrates foam sheathing insulation with wall framing such that wood structural panels are installed exterior of the foam sheathing, enabling the use of standard practices for installation of drainage plane, windows and doors, claddings, cavity insulation, and the standard exterior foam sheathing installation approach prone to damage of the foam during transportation of prefabricated wall panels. As part of the ongoing work, the EP&B wall system concept has undergone structural verification testing and has been positively vetted by a group of industry stakeholders. Having passed these initial milestone markers, the advanced wall system design has been analyzed to assess cost implications relative to other advanced wall systems, undergone design assessment to develop construction details, and has been evaluated to develop representative prescriptive requirements for the building code. This report summarizes the assessment steps conducted to-date and provides details of the concept development.
Original languageAmerican English
Number of pages89
StatePublished - 2015

Bibliographical note

Work performed by Home Innovation Research Labs, Partnership for Home Innovation, Upper Marlboro, Maryland

NREL Publication Number

  • NREL/SR-5500-64163

Other Report Number

  • DOE/GO-102015-4666


  • Building America
  • CI
  • continuous wall insulation
  • cost
  • EP&B
  • high performance walls
  • high-R walls
  • PHI
  • residential
  • Residential Buildings
  • walls


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