This is a list of insulation materials used around the world.

Typical R-values are given for various materials and structures as approximations based on the average of available figures and are sorted by lowest value. R-value at 1 m gives R-values normalised to a 1 metre (3 ft 3 in) thickness and sorts by median value of the range.

Material Thickness R-value R-value at 1 m
(m2·K/W)
(cm) (in) (m2·K/W) (ft2·°F·h/BTU)
Vacuum insulated panel 2.541 5.28–8.814–66[1]208–346
Silica aerogel 2.541 1.7610.3[2]69
Polyurethane rigid panel (CFC/HCFC-expanded) initial 2.541 1.23–1.417–848–56
Polyurethane rigid panel (CFC/HCFC-expanded) aged 5–10 years 2.541 1.106.2543
Polyurethane rigid panel (pentane-expanded) initial 2.541 1.206.847
Polyurethane rigid panel (pentane-expanded) aged 5–10 years 2.541 0.975.538
Foil-faced polyurethane rigid panel (pentane-expanded) 2.541 1.1–1.245–48 [3]
Foil-faced polyisocyanurate rigid panel (pentane-expanded) initial 2.541 1.206.855 [3]
Foil-faced polyisocyanurate rigid panel (pentane-expanded) aged 5–10 years 2.541 0.975.538
Polyisocyanurate spray foam 2.541 0.76–1.464.3–8.330–57
Closed-cell polyurethane spray foam 2.541 0.97–1.145.5–6.538–45
Phenolic spray foam 2.541 0.85–1.234.8–733–48
Thinsulate clothing insulation[4] 2.541 0.28–0.511.6–2.911–20
Urea-formaldehyde panels 2.541 0.88–1.065–635–42
Drywall[5] 2.541 0.15.96.2
Urea foam[6] 2.541 0.925.2536.4
Extruded expanded polystyrene (XPS) high-density 2.541 0.88–0.955–5.426–40[3]
Polystyrene board[6] 2.541 0.885.0035
Phenolic rigid panel 2.541 0.70–0.884–528–35
Urea-formaldehyde foam 2.541 0.70–0.814–4.628–32
High-density fiberglass batts 2.541 0.63–0.883.6–525–35
Extruded expanded polystyrene (XPS) low-density 2.541 0.63–0.823.6–4.725–32
Icynene loose-fill (pour-fill)[7] 2.541 0.70428
Molded expanded polystyrene (EPS) high-density 2.541 0.704.2 22–32[3]
Rice hulls[8] 2.541 0.503.024
Fiberglass batts[9] 2.541 0.55–0.763.1–4.322–30
Cotton batts (blue jean insulation)[10][11] 2.541 0.653.726
Molded expanded polystyrene (EPS) low-density 2.541 0.653.8526
Sheep's wool batt[12] 2.541 0.653.726
Icynene spray[7][13] 2.541 0.633.625
Open-cell polyurethane spray foam 2.541 0.633.625
Cardboard 2.541 0.52–0.73–420–28
Rock and slag wool batts 2.541 0.52–0.683–3.8520–27
Cellulose loose-fill[14] 2.541 0.52–0.673–3.820–26
Cellulose wet-spray[14] 2.541 0.52–0.673–3.820–26
Rock and slag wool loose-fill[15] 2.541 0.44–0.652.5–3.717–26
Fiberglass loose-fill[15] 2.541 0.44–0.652.5–3.717–26
Polyethylene foam 2.541 0.52320
Cementitious foam 2.541 0.35–0.692–3.914–27
Perlite loose-fill 2.541 0.482.719
Wood panels, such as sheathing 2.541 0.442.517 (9[16])
Fiberglass rigid panel 2.541 0.442.517
Vermiculite loose-fill 2.541 0.38–0.422.13–2.415–17
Vermiculite[17] 2.541 0.382.1316–17[3]
Straw bale[18] 2.541 0.261.4516–22[3]
Papercrete[19] 2.541 2.6–3.218–22
Softwood (most)[20] 2.541 0.251.417.7 [16]
Wood chips and other loose-fill wood products 2.541 0.1817.1
Aerated/cellular concrete (5% moisture) 2.541 0.1817.1
Snow 2.541 0.1817.1
Hardwood (most)[20] 2.541 0.120.715.5 [16]
Brick 2.541 0.0300.21.3–1.8[16]
Glass[6] 2.541 0.0250.140.98
Uninsulated glass pane 0.60.25 0.160.910.98
Insulated glass (double glazed) 1.6–1.90.63–0.75 0.35240
Insulated glass (double glazed, hard low-e) 1.6–1.90.63–0.75 0.673.877
Insulated glass (double glazed, soft low-e) 1.6–1.90.63–0.75 0.905.11100
Insulated glass (triple glazed) 3.2–3.81.2–1.5 0.673.840
Poured concrete[6] 2.541 0.0140.080.43–0.87 [16]
Material Thickness R-value R-value at 1 m
(m2·K/W)
(cm) (in) (m2·K/W) (ft2·°F·h/BTU)

References

  1. ↑ https://b2b-api.panasonic.eu/file_stream/pids/fileversion/3247
  2. ↑ http://www.starch.dk/private/energy/img/Spaceloft_DS.pdf
  3. 1 2 3 4 5 6 Energy Saving Trust. "CE71 – Insulation materials chart – thermal properties and environmental ratings". Energysavingtrust.org.uk. Retrieved 2014-02-23.
  4. ↑ "Archived copy" (PDF). Archived from the original (PDF) on 2014-10-21. Retrieved 2014-10-14.{{cite web}}: CS1 maint: archived copy as title (link)
  5. ↑ http://coloradoenergy.org/procorner/stuff/r-values.htm
  6. 1 2 3 4 Ristinen, Robert A., and Jack J. Kraushaar. Energy and the Environment. 2nd ed. Hoboken, NJ: John Wiley & Sons, Inc., 2006.
  7. 1 2 "The Icynene Insulation System". June 12, 2008. Archived from the original on June 12, 2008. Retrieved August 9, 2009.
  8. ↑ "Rice hulls in construction – Appropedia: The sustainability wiki". Appropedia. 2013-02-23. Retrieved 2014-02-23.
  9. ↑ "Products | Johns Manville Insulation". Jminsulation.com.au. Archived from the original on 2014-02-26. Retrieved 2014-02-23.
  10. ↑ "Green Building Materials, Green Products". Greendepot.com. Retrieved 24 February 2019.
  11. ↑ "What is Green Living?". Archived from the original on September 29, 2008. Retrieved May 8, 2009.
  12. ↑ "sheep's wool specifications" (PDF).
  13. ↑ "Portfolio of Spray Foam Insulation Products | Icynene". Archived from the original on 2014-07-23. Retrieved 2014-07-17.
  14. 1 2 "ICC Legacy Report ER-2833 – Cocoon Thermal and Sound Insulation Products". ICC Evaluation Services, Inc. Retrieved 2014-02-23.
  15. 1 2 "Buildings Energy Data Book". Buildingsdatabook.eren.doe.gov. Archived from the original on 2014-02-27. Retrieved 2014-02-23.
  16. 1 2 3 4 5 Brian Anderson (2006). "Conventions for U-value calculations" (PDF). Bre.co.uk. Retrieved 2014-02-23.
  17. ↑ "Evergreen Insulation - Types of insulation and R-Values". 27 July 2013. Retrieved 27 August 2021.
  18. ↑ "R-Value of Straw Bales Lower Than Previously Reported – EBN: 7:9". Buildinggreen.com. September 1, 1998. Retrieved 2018-10-03.
  19. ↑ "Archived copy" (PDF). Archived from the original (PDF) on 2014-07-07. Retrieved 2014-07-21.{{cite web}}: CS1 maint: archived copy as title (link)
  20. 1 2 "Home Design & Remodeling | Department of Energy". Energysavers.gov. Retrieved 2014-02-23.
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