Hey all, I just happen to have three 36" long x 5" high x 4" wide sections of foam shower stall sill material as shown here: http://www.schluter.com/8_3_kerdi_st..._material.aspx
It says it is expanded polystyrene. Specifically: "The polystyrene foam has a density of 2.75 lb/ft3 (44 kg/m3) with a 48 psi (331 kPa) compressive strength at 10% deformation. It is serviceable in temperatures up to 175°F (79 °C)."
Having used the stuff to build three walk-in showers in my house I can attest to its strength.
I was going to sell it off but me thinks it would be dandy building material unless it is too heavy.
The styrofoam most commonly used min model aircraft is 1.0 lb density.
It could still be useful to some but they'd have to want it for heavier duty application than the average foam core wing.
That's a big difference
1.75 lbs/cubic ft is big difference.
In my hand it feels a lot more dense than the foam used for my Super Cub wing, which is EPP if I recall correctly but only a bit more dense than my Fun Cub which is elapor (whatever that is)
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