Mitigating Moisture with High-R Walls

Research output: NRELFact Sheet


Energy-efficient building enclosures are key to decreasing energy load demand and enabling advanced space-conditioning systems for high-performance homes. One efficient enclosure design solution is high-R walls, which feature increased insulation levels as an effective solution for reducing air leakage and permeance of material layers. To increase builder confidence and encourage greater market adoption of high-R walls, Home Innovation Research Labs sought to demonstrate the long-term moisture performance of several high-R wall configurations in cold climate zones. The team monitored 22 newly constructed, occupied homes located throughout climate zones 4–7, where a substantial vapor drive to the exterior is present during the winter.
Original languageAmerican English
Number of pages2
StatePublished - 2020

NREL Publication Number

  • NREL/FS-5500-75891

Other Report Number

  • DOE/GO-102020-5252


  • buildings
  • high-R walls
  • moisture
  • wall insulation


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