I used this on a 6x10 layout. I glued woodland scenic foam road bed to the blue foam and glued the track to the roadbed. Spread it with a putty knife and weigh it down. It is secure but not hard to pull the track up if you need to. I used mostly gargraves sectional track and a few short pieces of flex track. Screws and nails will not hold curved flextrack in place on blue foam.
Bob