Dave Zucal posted:GG-1FAN, like fiberglass, cotton balls squashed under the cavity works too. Though Fastrack is loud because of its hollow track and hollow roadbed, it does have the advantage of staggered joints and very smooth transition from track to track. It quiets down the click clack of all the wheels and cuts down on train vibration. ROB, if cost is not a major factor and you want to combine the ideas contributed here, drywall topped with 1/2" tiles, foam, or homasote, then glue down a thin sheet of MDF for your short screws to bite into, then your green grass mat, would possibly be the maximum noise protection you can create. I like gluing down the rolls of green mat that Lowe's sells that are 6' x 8'. It's made of recycled bottles and is the same texture as the soft half of Velcro. It allows you to hold objects down by sticking small pieces of the porcupine half of the Velcro to your objects to hold them in place and easily move them if needed.
What is the name of the grass mat? I am on a tight budget, but I like sticking cotton balls in the bottom. I also thought maybe quilting cotton and do a Christmas scene, but I think I want to do a summer scene.
