@Laker80 posted:Ok thanks for the screw size. I planned on screwing everything down once I get the additional layout set because the kids tend to dislodge anything that isn’t fastened down.
I have the layout on soundboard now but I have foam insulation underneath because I didn’t know which one I would like more. I like the texture of the soundboard and it feels more rugged but it did start to bow up at the corners after I painted it. I set some weights on the ends and it seemed to cure most of the issue. If not, I can always flip it over and put the foam on top.
Any foam board will warp if painted, especially using a water-based paint. You can minimize the warping or eliminate it by always painting BOTH sides.
A closed-cell foam, cork, or PVC track bed will not warp and will give you sound-deadening qualities. I used
"O" Scale Gray Sound Foam Track Roadbed" from an e-Bay vendor. A 30" pieces is about $1 a foot. It is grey in color, easy to work with etc. But the Woodland Scenics "Track Bed" (PVC foam) is more readily available, and also works well.
