Insulation (list of insulation material)

R-values per inch given in SI and Imperial units (Typical values are approximations, based on the average of available results. Ranges are marked with "–". Clicking on SI column sorts by median value of range, clicking on Imperial column sorts by lowest value. Third column are real SI values that are not per inch. Based on the units, the two last columns should have a conversion factor of 5.71. In practice, the numbers will have been measured using different methods.)

Material	m^2·K/(W·in)	ft^2·°F·h/(BTU·in)	m·K/W
Vacuum insulated panel	5.28–8.8	R-30–R-50
Silica aerogel	1.76	R-10
Polyurethane rigid panel (CFC/HCFC expanded) initial	1.23–1.41	R-7–R-8
Polyurethane rigid panel (CFC/HCFC expanded) aged 5–10 years	1.10	R-6.25
Polyurethane rigid panel (pentane expanded) initial	1.20	R-6.8
Polyurethane rigid panel (pentane expanded) aged 5–10 years	0.97	R-5.5
Foil faced Polyurethane rigid panel (pentane expanded)			45-48 [1]
Foil-faced polyisocyanurate rigid panel (pentane expanded ) initial	1.20	R-6.8	55 [1]
Foil-faced polyisocyanurate rigid panel (pentane expanded) aged 5–10 years	0.97	R-5.5
Polyisocyanurate spray foam	0.76–1.46	R-4.3–R-8.3
Closed-cell polyurethane spray foam	0.97–1.14	R-5.5–R-6.5
Phenolic spray foam	0.85–1.23	R-4.8–R-7
Thinsulate clothing insulation[2]	0.28-0.51	R-1.6–R-2.9
Urea-formaldehyde panels	0.88–1.06	R-5–R-6
Urea foam[3]	0.92	R-5.25
Extruded expanded polystyrene (XPS) high-density	0.88–0.95	R-5–R-5.4	26-40[1]
Polystyrene board[3]	0.88	R-5.00
Phenolic rigid panel	0.70–0.88	R-4–R-5
Urea-formaldehyde foam	0.70–0.81	R-4–R-4.6
High-density fiberglass batts	0.63–0.88	R-3.6–R-5
Extruded expanded polystyrene (XPS) low-density	0.63–0.82	R-3.6–R-4.7
Icynene loose-fill (pour fill)[4]	0.70	R-4
Molded expanded polystyrene (EPS) high-density	0.70	R-4.2	22-32[1]
Home Foam[5]	0.69	R-3.9
Rice hulls[6]	0.50	R-3.0	24
Fiberglass batts[7]	0.55–0.76	R-3.1–R-4.3
Cotton batts (Blue Jean insulation)[8][9]	0.65	R-3.7
Molded expanded polystyrene (EPS) low-density	0.65	R-3.85
Icynene spray[4][10]	0.63	R-3.6
Open-cell polyurethane spray foam	0.63	R-3.6
Cardboard	0.52–0.7	R-3–R-4
Rock and slag wool batts	0.52–0.68	R-3–R-3.85
Cellulose loose-fill[11]	0.52–0.67	R-3–R-3.8
Cellulose wet-spray[11]	0.52–0.67	R-3–R-3.8
Rock and slag wool loose-fill[12]	0.44–0.65	R-2.5–R-3.7
Fiberglass loose-fill[12]	0.44–0.65	R-2.5–R-3.7
Polyethylene foam	0.52	R-3
Cementitious foam	0.35–0.69	R-2–R-3.9
Perlite loose-fill	0.48	R-2.7
Wood panels, such as sheathing	0.44	R-2.5	9 [13]
Fiberglass rigid panel	0.44	R-2.5
Vermiculite loose-fill	0.38–0.42	R-2.13–R-2.4
Vermiculite[14]	0.38	R-2.13	16-17[1]
Straw bale[15]	0.26	R-1.45	16-22[1]
Papercrete[16]		R-2.6-R-3.2
Softwood (most)[17]	0.25	R-1.41	7.7 [13]
Wood chips and other loose-fill wood products	0.18	R-1
Snow	0.18	R-1
Hardwood (most)[17]	0.12	R-0.71	5.5 [13]
Brick	0.030	R-0.2	1.3-1.8[13]
Glass[3]	0.025	R-0.14
Poured concrete[3]	0.014	R-0.08	0.43-0.87 [13]

References

1. Energy Saving Trust. "CE71 - Insulation materials chart – thermal properties and environmental ratings". Energysavingtrust.org.uk. Retrieved 2014-02-23.
2. http://www.indapac.com/docs/3M_Thin_TypeG.pdf
3. Ristinen, Robert A., and Jack J. Kraushaar. Energy and the Environment. 2nd ed. Hoboken, NJ: John Wiley & Sons, Inc., 2006.
4. https://web.archive.org/20080612090032/http://www.icynene.com:80/InsulationSystem.aspx. Archived from the original on June 12, 2008. Retrieved August 9, 2009. Missing or empty |title= (help)
5. "Elastochem Specialty Chemicals | Foams: Spray Foam Insulation, Injection Foam and Pour in Place Foam". Elastochem-ca.com. Retrieved 2014-02-23.
6. "Rice hulls in construction - Appropedia: The sustainability wiki". Appropedia. 2013-02-23. Retrieved 2014-02-23.
7. "Products | Johns Manville Insulation". Jminsulation.com.au. Retrieved 2014-02-23.
8. Greendepot. "UltraTouch Recycled Cotton Insulation".
9. https://web.archive.org/20080929071138/http://www.environmentalhomecenter.com:80/shop.mv?CatCode=PRODUCT&ProdCode=COTTON_INSULATION. Archived from the original on September 29, 2008. Retrieved May 8, 2009. Missing or empty |title= (help)
10. ICYNENE Inc. "Icynene’s Product Portfolio".
11. "ICC Legacy Report ER-2833 - Cocoon Thermal and Sound Insulation Products". ICC Evaluation Services, Inc. Retrieved 2014-02-23.
12. "Buildings Energy Data Book". Buildingsdatabook.eren.doe.gov. Retrieved 2014-02-23.
13. Brian Anderson (2006). "Conventions for U-value calculations" (PDF). Bre.co.uk. Retrieved 2014-02-23.
14. [[5:54:59 μμ] http://www.coloradoenergy.org/procorner/stuff/r-values.htm] Archived July 27, 2013, at the Wayback Machine.
15. "R-Value of Straw Bales Lower Than Previously Reported - EBN: 7:9". Buildinggreen.com. Retrieved 2014-02-23.
17. "Home Design & Remodeling | Department of Energy". Energysavers.gov. Retrieved 2014-02-23.