Gary:
Tim seems to be using the foam as underlayment for his track. Is this good
practice these
days? I thought that stuff was only for scenery.
Track can be (and is) routinely put on top of both blue/pink foams. It does
tend to be very noisy, and various roadbeds have been tried by folks to quiet
it down.
Track also works over white crumbly foams very well, too...provided the white
foam has been carved with a "hot wire" cutter and a straight edge, or, some
form of hardshell applied over the carved foam to make a stable platform for
the track. Granted, cork would be a real plus to keeping track flat and true on
this type of construction. It could be difficult to control white foams (and
expanding foams) well enough for direct track placement.
Woodland Scenics entire product line is based on white crumbly foam...and a
number of ZBT modules have been built with it with no negatives posted to the
list(s).
Not all hands are created equal. Plan to use what works for your hands,
tools, imagination and talents.
Bill K.
Houston