Skip to content National Residential Efficiency Measures Database National Renewable Energy Laboratory

Submit Questions/Comments

Retrofit Measures for Crawlspace

Here you will find the data for Crawlspace measures available in the National Residential Efficiency Measures Database. Each measure consists of a before-component, an after-component, and the estimated cost to implement the measure. The measures are listed alphabetically based upon the name of the before-component. Where multiple costs are indicated they must be combined to obtain total measure cost (e.g., fixed ($) and normalized ($/sf) costs).

Cost Drivers

There are many factors that influence the ultimate cost of Crawlspace measures. The application of the average measure costs displayed below to any particular home is discouraged. Examples of the kinds of issues that can influence the cost of Crawlspace measures include:
  • Prevailing local wages
  • Drive time
  • Local code requirements
  • Access
  • Presence/condition/type of existing insulation
  • Existing construction and materials
  • Moisture issues present
  • Adequacy of existing ventilation
  • Presence of hazardous materials
  • Extent of preparation
  • Accommodation for termite inspections
  • Crawlspace height

Viewing 11 Crawlspace Measure(s) of 11

Insulate Crawlspace Ceiling with Fiberglass Batt:

Before-Component After-Component Cost

Uninsulated, Vented

Properties:

  • ACH: 2.0 1/hr
  • Ceiling Cavity Insulation Nominal R-value: h-ft^2-R/Btu
  • Ceiling Cavity Insulation Type:
  • Ceiling Framing Factor: 0.13 frac
  • Wall Continuous Insulation Nominal R-value: h-ft^2-R/Btu
  • Wall Continuous Insulation Type:

Performance Standards:

  • Meets IECC 2009 (1A, 1B, 1C, 2A, 2B, 2C)
  • Meets IECC 2012 (1A, 1B, 1C, 2A, 2B, 2C)

Lifetime:

  • 999 Years
 

Ceiling R-13 Fiberglass Batt, Vented

Properties:

  • ACH: 2.0 1/hr
  • Ceiling Cavity Insulation Nominal R-value: 13.0 h-ft^2-R/Btu
  • Ceiling Cavity Insulation Type: fiberglass batt
  • Ceiling Framing Factor: 0.13 frac
  • Wall Continuous Insulation Nominal R-value: h-ft^2-R/Btu
  • Wall Continuous Insulation Type:

Performance Standards:

  • Meets IECC 2009 (1A, 1B, 1C, 2A, 2B, 2C)
  • Meets IECC 2012 (1A, 1B, 1C, 2A, 2B, 2C)

Lifetime:

  • 999 Years
 

Measure Cost

UnitsRangeAverage
$/ft^2 Ceiling 0.58 - 1.10.85

Insulate Crawlspace Ceiling with Fiberglass Batt:

Before-Component After-Component Cost

Uninsulated, Vented

Properties:

  • ACH: 2.0 1/hr
  • Ceiling Cavity Insulation Nominal R-value: h-ft^2-R/Btu
  • Ceiling Cavity Insulation Type:
  • Ceiling Framing Factor: 0.13 frac
  • Wall Continuous Insulation Nominal R-value: h-ft^2-R/Btu
  • Wall Continuous Insulation Type:

Performance Standards:

  • Meets IECC 2009 (1A, 1B, 1C, 2A, 2B, 2C)
  • Meets IECC 2012 (1A, 1B, 1C, 2A, 2B, 2C)

Lifetime:

  • 999 Years
 

Ceiling R-19 Fiberglass Batt, Vented

Properties:

  • ACH: 2.0 1/hr
  • Ceiling Cavity Insulation Nominal R-value: 19.0 h-ft^2-R/Btu
  • Ceiling Cavity Insulation Type: fiberglass batt
  • Ceiling Framing Factor: 0.13 frac
  • Wall Continuous Insulation Nominal R-value: h-ft^2-R/Btu
  • Wall Continuous Insulation Type:

Performance Standards:

  • Exceeds IECC 2009 (1A, 1B, 1C, 2A, 2B, 2C)
  • Meets IECC 2009 (3A, 3B, 3C, 4A, 4B)
  • Exceeds IECC 2012 (1A, 1B, 1C, 2A, 2B, 2C)
  • Meets IECC 2012 (3A, 3B, 3C, 4A, 4B)

Lifetime:

  • 999 Years
 

Measure Cost

UnitsRangeAverage
$/ft^2 Ceiling 0.66 - 1.30.96

Insulate Crawlspace Ceiling with Fiberglass Batt:

Before-Component After-Component Cost

Uninsulated, Vented

Properties:

  • ACH: 2.0 1/hr
  • Ceiling Cavity Insulation Nominal R-value: h-ft^2-R/Btu
  • Ceiling Cavity Insulation Type:
  • Ceiling Framing Factor: 0.13 frac
  • Wall Continuous Insulation Nominal R-value: h-ft^2-R/Btu
  • Wall Continuous Insulation Type:

Performance Standards:

  • Meets IECC 2009 (1A, 1B, 1C, 2A, 2B, 2C)
  • Meets IECC 2012 (1A, 1B, 1C, 2A, 2B, 2C)

Lifetime:

  • 999 Years
 

Ceiling R-30 Fiberglass Batt, Vented

Properties:

  • ACH: 2.0 1/hr
  • Ceiling Cavity Insulation Nominal R-value: 30.0 h-ft^2-R/Btu
  • Ceiling Cavity Insulation Type: fiberglass batt
  • Ceiling Framing Factor: 0.13 frac
  • Wall Continuous Insulation Nominal R-value: h-ft^2-R/Btu
  • Wall Continuous Insulation Type:

Performance Standards:

  • Exceeds IECC 2009 (1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3C, 4A, 4B)
  • Meets IECC 2009 (4C, 5A, 5B, 5C, 6A, 6B, 6C)
  • Exceeds IECC 2012 (1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3C, 4A, 4B)
  • Meets IECC 2012 (4C, 5A, 5B, 5C, 6A, 6B, 6C)

Lifetime:

  • 999 Years
 

Measure Cost

UnitsRangeAverage
$/ft^2 Ceiling 0.82 - 1.51.2

Insulate Crawlspace Ceiling with Fiberglass Batt:

Before-Component After-Component Cost

Uninsulated, Vented

Properties:

  • ACH: 2.0 1/hr
  • Ceiling Cavity Insulation Nominal R-value: h-ft^2-R/Btu
  • Ceiling Cavity Insulation Type:
  • Ceiling Framing Factor: 0.13 frac
  • Wall Continuous Insulation Nominal R-value: h-ft^2-R/Btu
  • Wall Continuous Insulation Type:

Performance Standards:

  • Meets IECC 2009 (1A, 1B, 1C, 2A, 2B, 2C)
  • Meets IECC 2012 (1A, 1B, 1C, 2A, 2B, 2C)

Lifetime:

  • 999 Years
 

Ceiling R-38 Fiberglass Batt, Vented

Properties:

  • ACH: 2.0 1/hr
  • Ceiling Cavity Insulation Nominal R-value: 38.0 h-ft^2-R/Btu
  • Ceiling Cavity Insulation Type: fiberglass batt
  • Ceiling Framing Factor: 0.13 frac
  • Wall Continuous Insulation Nominal R-value: h-ft^2-R/Btu
  • Wall Continuous Insulation Type:

Performance Standards:

  • Exceeds IECC 2009 (1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3C, 4A, 4B, 4C, 5A, 5B, 5C, 6A, 6B, 6C)
  • Meets IECC 2009 (7, 8)
  • Exceeds IECC 2012 (1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3C, 4A, 4B, 4C, 5A, 5B, 5C, 6A, 6B, 6C)
  • Meets IECC 2012 (7, 8)

Lifetime:

  • 999 Years
 

Measure Cost

UnitsRangeAverage
$/ft^2 Ceiling 0.93 - 1.81.3

Seal and Insulate Crawlspace Wall with XPS:

Before-Component After-Component Cost

Uninsulated, Vented

Properties:

  • ACH: 2.0 1/hr
  • Ceiling Cavity Insulation Nominal R-value: h-ft^2-R/Btu
  • Ceiling Cavity Insulation Type:
  • Ceiling Framing Factor: 0.13 frac
  • Wall Continuous Insulation Nominal R-value: h-ft^2-R/Btu
  • Wall Continuous Insulation Type:

Performance Standards:

  • Meets IECC 2009 (1A, 1B, 1C, 2A, 2B, 2C)
  • Meets IECC 2012 (1A, 1B, 1C, 2A, 2B, 2C)

Lifetime:

  • 999 Years
 

Wall R-10 XPS

Properties:

  • ACH: 0.0 1/hr
  • Ceiling Cavity Insulation Nominal R-value: h-ft^2-R/Btu
  • Ceiling Cavity Insulation Type:
  • Ceiling Framing Factor: 0.13 frac
  • Wall Continuous Insulation Nominal R-value: 10.0 h-ft^2-R/Btu
  • Wall Continuous Insulation Type: xps

Performance Standards:

  • Exceeds IECC 2009 (1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3C)
  • Meets IECC 2009 (4A, 4B, 4C, 5A, 5B, 5C, 6A, 6B, 6C, 7, 8)
  • Exceeds IECC 2012 (1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3C)
  • Meets IECC 2012 (4A, 4B)

Lifetime:

  • 999 Years
 

Measure Cost

UnitsRangeAverage
$/ft^2 Floor 0.51 - 1.10.84
$/ft^2 Wall 1.2 - 2.31.7

Seal and Insulate Crawlspace Wall with Fiberglass Batt:

Before-Component After-Component Cost

Uninsulated, Vented

Properties:

  • ACH: 2.0 1/hr
  • Ceiling Cavity Insulation Nominal R-value: h-ft^2-R/Btu
  • Ceiling Cavity Insulation Type:
  • Ceiling Framing Factor: 0.13 frac
  • Wall Continuous Insulation Nominal R-value: h-ft^2-R/Btu
  • Wall Continuous Insulation Type:

Performance Standards:

  • Meets IECC 2009 (1A, 1B, 1C, 2A, 2B, 2C)
  • Meets IECC 2012 (1A, 1B, 1C, 2A, 2B, 2C)

Lifetime:

  • 999 Years
 

Wall R-11 Fiberglass Batt

Properties:

  • ACH: 0.0 1/hr
  • Ceiling Cavity Insulation Nominal R-value: h-ft^2-R/Btu
  • Ceiling Cavity Insulation Type:
  • Ceiling Framing Factor: 0.13 frac
  • Wall Continuous Insulation Nominal R-value: 11.0 h-ft^2-R/Btu
  • Wall Continuous Insulation Type: fiberglass batt

Performance Standards:

  • Exceeds IECC 2009 (1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3C, 4A, 4B, 4C, 5A, 5B, 5C, 6A, 6B, 6C, 7, 8)
  • Exceeds IECC 2012 (1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3C, 4A, 4B)

Lifetime:

  • 999 Years
 

Measure Cost

UnitsRangeAverage
$/ft^2 Floor 0.51 - 1.10.84
$/ft^2 Wall 0.74 - 1.51.1

Seal and Insulate Crawlspace Wall with Fiberglass Batt:

Before-Component After-Component Cost

Uninsulated, Vented

Properties:

  • ACH: 2.0 1/hr
  • Ceiling Cavity Insulation Nominal R-value: h-ft^2-R/Btu
  • Ceiling Cavity Insulation Type:
  • Ceiling Framing Factor: 0.13 frac
  • Wall Continuous Insulation Nominal R-value: h-ft^2-R/Btu
  • Wall Continuous Insulation Type:

Performance Standards:

  • Meets IECC 2009 (1A, 1B, 1C, 2A, 2B, 2C)
  • Meets IECC 2012 (1A, 1B, 1C, 2A, 2B, 2C)

Lifetime:

  • 999 Years
 

Wall R-13 Fiberglass Batt

Properties:

  • ACH: 0.0 1/hr
  • Ceiling Cavity Insulation Nominal R-value: h-ft^2-R/Btu
  • Ceiling Cavity Insulation Type:
  • Ceiling Framing Factor: 0.13 frac
  • Wall Continuous Insulation Nominal R-value: 13.0 h-ft^2-R/Btu
  • Wall Continuous Insulation Type: fiberglass batt

Performance Standards:

  • Exceeds IECC 2009 (1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3C, 4A, 4B, 4C, 5A, 5B, 5C, 6A, 6B, 6C, 7, 8)
  • Exceeds IECC 2012 (1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3C, 4A, 4B)

Lifetime:

  • 999 Years
 

Measure Cost

UnitsRangeAverage
$/ft^2 Floor 0.51 - 1.10.84
$/ft^2 Wall 0.79 - 1.61.2

Seal and Insulate Crawlspace Wall with XPS:

Before-Component After-Component Cost

Uninsulated, Vented

Properties:

  • ACH: 2.0 1/hr
  • Ceiling Cavity Insulation Nominal R-value: h-ft^2-R/Btu
  • Ceiling Cavity Insulation Type:
  • Ceiling Framing Factor: 0.13 frac
  • Wall Continuous Insulation Nominal R-value: h-ft^2-R/Btu
  • Wall Continuous Insulation Type:

Performance Standards:

  • Meets IECC 2009 (1A, 1B, 1C, 2A, 2B, 2C)
  • Meets IECC 2012 (1A, 1B, 1C, 2A, 2B, 2C)

Lifetime:

  • 999 Years
 

Wall R-15 XPS

Properties:

  • ACH: 0.0 1/hr
  • Ceiling Cavity Insulation Nominal R-value: h-ft^2-R/Btu
  • Ceiling Cavity Insulation Type:
  • Ceiling Framing Factor: 0.13 frac
  • Wall Continuous Insulation Nominal R-value: 15.0 h-ft^2-R/Btu
  • Wall Continuous Insulation Type: xps

Performance Standards:

  • Exceeds IECC 2009 (1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3C, 4A, 4B, 4C, 5A, 5B, 5C, 6A, 6B, 6C, 7, 8)
  • Exceeds IECC 2012 (1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3C, 4A, 4B)
  • Meets IECC 2012 (4C, 5A, 5B, 5C, 6A, 6B, 6C, 7, 8)

Lifetime:

  • 999 Years
 

Measure Cost

UnitsRangeAverage
$/ft^2 Floor 0.51 - 1.10.84
$/ft^2 Wall 1.7 - 3.12.4

Seal and Insulate Crawlspace Wall with Fiberglass Batt:

Before-Component After-Component Cost

Uninsulated, Vented

Properties:

  • ACH: 2.0 1/hr
  • Ceiling Cavity Insulation Nominal R-value: h-ft^2-R/Btu
  • Ceiling Cavity Insulation Type:
  • Ceiling Framing Factor: 0.13 frac
  • Wall Continuous Insulation Nominal R-value: h-ft^2-R/Btu
  • Wall Continuous Insulation Type:

Performance Standards:

  • Meets IECC 2009 (1A, 1B, 1C, 2A, 2B, 2C)
  • Meets IECC 2012 (1A, 1B, 1C, 2A, 2B, 2C)

Lifetime:

  • 999 Years
 

Wall R-19 Fiberglass Batt

Properties:

  • ACH: 0.0 1/hr
  • Ceiling Cavity Insulation Nominal R-value: h-ft^2-R/Btu
  • Ceiling Cavity Insulation Type:
  • Ceiling Framing Factor: 0.13 frac
  • Wall Continuous Insulation Nominal R-value: 19.0 h-ft^2-R/Btu
  • Wall Continuous Insulation Type: fiberglass batt

Performance Standards:

  • Exceeds IECC 2009 (1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3C, 4A, 4B, 4C, 5A, 5B, 5C, 6A, 6B, 6C, 7, 8)
  • Exceeds IECC 2012 (1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3C, 4A, 4B, 4C, 5A, 5B, 5C, 6A, 6B, 6C, 7, 8)

Lifetime:

  • 999 Years
 

Measure Cost

UnitsRangeAverage
$/ft^2 Floor 0.51 - 1.10.84
$/ft^2 Wall 0.96 - 1.91.5

Seal and Insulate Crawlspace Wall with XPS:

Before-Component After-Component Cost

Uninsulated, Vented

Properties:

  • ACH: 2.0 1/hr
  • Ceiling Cavity Insulation Nominal R-value: h-ft^2-R/Btu
  • Ceiling Cavity Insulation Type:
  • Ceiling Framing Factor: 0.13 frac
  • Wall Continuous Insulation Nominal R-value: h-ft^2-R/Btu
  • Wall Continuous Insulation Type:

Performance Standards:

  • Meets IECC 2009 (1A, 1B, 1C, 2A, 2B, 2C)
  • Meets IECC 2012 (1A, 1B, 1C, 2A, 2B, 2C)

Lifetime:

  • 999 Years
 

Wall R-20 XPS

Properties:

  • ACH: 0.0 1/hr
  • Ceiling Cavity Insulation Nominal R-value: h-ft^2-R/Btu
  • Ceiling Cavity Insulation Type:
  • Ceiling Framing Factor: 0.13 frac
  • Wall Continuous Insulation Nominal R-value: 20.0 h-ft^2-R/Btu
  • Wall Continuous Insulation Type: xps

Performance Standards:

  • Exceeds IECC 2009 (1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3C, 4A, 4B, 4C, 5A, 5B, 5C, 6A, 6B, 6C, 7, 8)
  • Exceeds IECC 2012 (1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3C, 4A, 4B, 4C, 5A, 5B, 5C, 6A, 6B, 6C, 7, 8)

Lifetime:

  • 999 Years
 

Measure Cost

UnitsRangeAverage
$/ft^2 Floor 0.51 - 1.10.84
$/ft^2 Wall 2.1 - 3.93

Seal and Insulate Crawlspace Wall with XPS:

Before-Component After-Component Cost

Uninsulated, Vented

Properties:

  • ACH: 2.0 1/hr
  • Ceiling Cavity Insulation Nominal R-value: h-ft^2-R/Btu
  • Ceiling Cavity Insulation Type:
  • Ceiling Framing Factor: 0.13 frac
  • Wall Continuous Insulation Nominal R-value: h-ft^2-R/Btu
  • Wall Continuous Insulation Type:

Performance Standards:

  • Meets IECC 2009 (1A, 1B, 1C, 2A, 2B, 2C)
  • Meets IECC 2012 (1A, 1B, 1C, 2A, 2B, 2C)

Lifetime:

  • 999 Years
 

Wall R-5 XPS

Properties:

  • ACH: 0.0 1/hr
  • Ceiling Cavity Insulation Nominal R-value: h-ft^2-R/Btu
  • Ceiling Cavity Insulation Type:
  • Ceiling Framing Factor: 0.13 frac
  • Wall Continuous Insulation Nominal R-value: 5.0 h-ft^2-R/Btu
  • Wall Continuous Insulation Type: xps

Performance Standards:

  • Exceeds IECC 2009 (1A, 1B, 1C, 2A, 2B, 2C)
  • Meets IECC 2009 (3A, 3B, 3C)
  • Exceeds IECC 2012 (1A, 1B, 1C, 2A, 2B, 2C)
  • Meets IECC 2012 (3A, 3B, 3C)

Lifetime:

  • 999 Years
 

Measure Cost

UnitsRangeAverage
$/ft^2 Floor 0.51 - 1.10.84
$/ft^2 Wall 0.75 - 1.41.1

Version: v3.0.0