#44602 Sep 3 5:52 AM
Whether Homasote does or does not expand and contract seems to be
more an article of religious faith than of replictable data on
either side. I've had it glued and screwed to 1/2" ply in my
unsealed unheated California garage without any problems but my
friend about five miles from me hates it.
There are some relevant truths, however. First and foremost, it is
not a model railroad product made to our specifications. It is a
rough building product mostly used as sound deadening in walls our
under floors. A 1/16" difference between sheets is not an
insurmountable problem for a guy swinging a hammer.
Second, Lynn Westcott, who first discovered this product and put it
to model railroad use, claimed it could be used unsupported. The
chorus of "No, it can't" spanned a good ten years before people
finally quit trying.
Third, many years ago a guy (not the current owners nor even the guy
before them) took to milling the stuff into a product called Homabed
that gave the modeler a nice ballast profile, a uniform size, and an
ability to curve the stuff. Since then Homabed has been expanded to
cover a vast array of scales, gauges, and ballast angles.
Finally, a suspicion, not a fact. I suspect that there is not enough
tensile strength in the product either pushing or pulling to shift
benchwork. It would be much more likely to crumble. I have never
seen it claimed that the Homasote itself bowed up or shrank away.
The more likely culprit is the benchwork supporting it moving the
Homasote. (If you are not supporting it with benchwork, see above
comments about Lynn Wescott)
#44621 Sep 3 5:55 PM
--- In firstname.lastname@example.org,
I feel it is more dogma than religion. Same same for the previous
acceptance of a 30-inch HO mainline as being just fine, gota have a
pure linear design to be a real model railroader and the multi-part
way bill is the way to do operations.
I am not keen on any of it.