Has anyone ever tried building the "deck" like a stud wall laid horizontally and stuffed with batt insulation? wonder if that would work with sound absorption.
I didn't use batt insulation, but I placed 1/2" (I think) blue styrofoam under the layout between the joists. I can't say it was worth the trouble. The layout is a bit quieter, but not enough to get excited about. Toy trains are loud; sometimes they just aren't as loud. I glued them to the underside of the plywood using Liquid Nail Projects (I think the regular stuff attacks the foam) and then ran a few cable ties through both layers and used another tie underneath the cinch it in place. Perhaps if I went through and added some Great Stuff spray insulation around the edges that would help.
J White
