@turkey_hollow_rr posted:I understand using extruded foam to create scenery but I don't understand why anyone would want to use it as a surface. It is too easily damaged, not to mention the sound issues others brought up. What am I missing with regards to using extruded foam under track?
Too easily damaged by what? How much weight do you place on the layout surface? I do not stand or crawl on the layouts. The surfaces are covered by structures, roadbed, plaster (in some places), ground cover and roads. The layout surface doesn't have to support anything heavy. The weight of a locomotive on the track does not damage foam, but foam is the best way to create realistic lightweight scenery. And, there are no "sound" issues in my experience.
MELGAR