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EPS Thickness and R-Value

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Expanded Polystyrene Thickness Table and R-Values

	Nominal Density	Tested Temp.	1.0”	2.0”	3.0”	4.0”	5.0”
	Nominal Density	Tested Temp.	R	R	R	R	R
Type 1	1.0#	@25F	4.35	8.53	13.01	17.35	21.72
		@40F	4.17	8.03	12.50	16.60	20.80
		@75F	3.85	7.69	11.49	15.38	19.23
Type VIII	1.25#	@25F	4.54	9.04	13.65	18.09	22.70
		@40F	4.26	8.47	12.82	16.95	21.28
		@75F	3.92	7.81	11.76	15.63	19.61
Type II	1.5#	@25F	4.73	9.45	14.21	18.90	23.62
		@40F	4.55	9.09	13.70	18.18	22.73
		@75F	4.17	8.33	12.50	16.67	20.83
Type IX	2.0#	@25F	5.00	10.00	17.97	23.79	30.01
		@40F	4.76	9.52	14.29	18.87	23.81
		@75F	4.35	8.70	12.99	17.24	21.74

* Conditioned thermal values were determined by ASTM Test Method C 518.

EPS Typical Insulation Thicknesses in Cold Storage Applications

Operating Temp Fº			Insulation Thickness			U Factor
						Btu (Hr) (Sq Ft) (Fº)
50			2” – 3”			.11 – .075
30			3” – 4”			.075 – .060
15			4” – 5”			.050 – .043
0			5” – 6”			.043 - .037
-15			6” – 7”			.037 - .032
-24			7” – 8”			.031 - .027