In watching videos of other folks layouts once and awhile you will see someone who put 2 layers of whatever sound deadner material or layered different sound absorbing materials on top of each other. Is there any advantage in this? Is more better?
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It let's you drive longer track screws without hitting plywood. That's the only advantage I could think of, but I'd be concerned about moisture absorption and swelling/shrinking with changes in moisture. Solid rail will give a slight improvement; if you're using Gargraves track, wooden ties would be better.
Matt, That is exactly what I was thinking, running longer screws thru two sheets without hitting the plywood. Also, at roughly $12 a sheet I could double down on the cheap stuff and still not be paying as much as I would for one sheet of Homosote. I was also wondering if more was better.
Does it really matter when running 2 or 3 locomotives with the modern sound systems
I don't worry that much about hitting the plywood with screws.
Get the ballast on and it will hold the track (Unless you have flex that won't stay bent), you can then remove the screws or put shorter ones in for a bit more grip with the ballast.
And Charlie, To some of us, Yes, it matters. I want to hear the engine over the sound of 40 cars behind it without waking the household.
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