Hybrid Wall Construction and Quality Control Issues in Wyandotte, Michigan

Research output: NRELSubcontract Report


This report is the second report on the Wyandotte NSP2 project in Wyandotte, MI and documents refinements to the design, construction, and quality control for the High R-value enclosure. The report will be of interest to designers and builders of production housing in Cold Climates. The focus of the second round of research was on using the hybrid insulation approach to develop a reliable methodof achieving consistently low airtightness numbers. There are two primary outcomes from this research. First, the airtightness measurements demonstrate that with a shallow learning curve, even new builders entering the program having little experience with the technology package are able to achieve consistent results that are less than 1.5 ACH50. Second, the process changes implemented to helpsecure these results were straightforward and ended up encouraging better communication between designer, builder, and the City officials supervising the project.
Original languageAmerican English
Number of pages41
StatePublished - 2013

Bibliographical note

Work performed by Building Science Corporation (BSC), Somerville, Massachusetts

NREL Publication Number

  • NREL/SR-5500-58712

Other Report Number

  • DOE/GO-102013-3941


  • Building America
  • Building Science Corporation (BSC)
  • cold
  • cold climate
  • enclosures
  • high-R
  • high-R value
  • hybrid insulation
  • low-rise residential
  • Michigan
  • residential
  • residential buildings
  • single family detached
  • SPF
  • wall insulation


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