>But you bring up a question I've been meaning to ask: how does Greyboard
>measure up again Blue and Pink? It's a much more neutral color and feels
>different, so maybe it's stiffer? Lighter?.
>
>-J
Here's some info I've compiled from various sources:
Comp Strength [psi] Density [lb/ft^3] Specific
Strength
Dow HL 115 115 3 38.3
OC Foamular 1000 100 3.6 27.8
Dow HL 60 60 2.2 27.3
OC Foamular 600 60 2.4 25.0
Dow HL 40 40 1.8 22.2
OC Foamular 400 40 2.04 19.6
OC Foamular 250 25 1.8 13.9
Dow Blue Type IV 25 1.8 13.9
Dow EPS Type IX 25 2 12.5
OC Foamular 150 15 1.4 10.7
Dow EPS Type II 15 1.5 10.0
Dow EPS Type I 10 1 10.0
Dow Blue Type X 15 1.6 9.4
Dow Grey 15 1.6 9.4
OC = Owens Corning
Choose your foam based on requirement: lightness => lowest density; strength
=> highest Specific Strength; all controlled by availability.
--TR
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