This table summarizes Forest Products Laboratory's test results. For a downloadable copy of the full report, click here.
Specimen	Density	Conductivity	R-value per inch	R-value for nom. 12" (30 CM) thick wall
	lbs/cu.ft.	W/m*K	hr*F*ft^2/BTU/inch	BTU per hr per sq.ft.
"Low Density I"	10.2	0.080	1.80	20.7
"Low Density II"	13.0	0.085	1.69	19.44
"South Dakota Straw I"	15.8	0.093	1.55	17.83
"South Dakota Straw II"	13.3	0.086	1.67	19.2
"Regular Mix I"	13.3	0.084	1.72	19.8
"Regular Mix II"	13.7	0.087	1.66	19.1
"New Mexico Straw I"	38.1	0.130	1.11	12.77
"New Mexico Straw II"	43.9	0.160	0.90	10.35

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