Measure Guideline: Internal Insulation of Masonry Walls

Research output: NRELSubcontract Report


This measure guideline provides recommendations for interior insulation assemblies that control interstitial condensation and durability risks; recommendations for acceptable thermal performance are also provided. An illustrated guide of high-risk exterior details (which concentrate bulk water), and recommended remediation details is provided. This is followed by a recommended methodology forrisk assessment of a masonry interior insulation project: a series of steps are suggested to assess the risks associated with this retrofit, with greater certainty with added steps.
Original languageAmerican English
Number of pages112
StatePublished - 2012

Bibliographical note

Work performed by Building Science Consortium, Somerville, Massachusetts

NREL Publication Number

  • NREL/SR-5500-54163

Other Report Number

  • DOE/GO-102012-3523


  • airtightness
  • combustion safety
  • embedded wood members
  • freeze-thaw
  • indoor air quality
  • insulation
  • interior insulation
  • interior retrofit
  • masonry
  • mass masonry
  • moisture management
  • retrofit
  • spray foam
  • spray polyurethane foam
  • thermal performance
  • water control
  • water shedding details


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