body/chassis flex

[claydbal]

curious about how stiff school bus body is. im sure they will flex a bit over rough roads, but how much? if using styrofoam as insulation, has anyone ever had it squeek or crack from flexing? how about flooring popping loose or self tapping screwss coming loose?

thanks

[opus]

Most leave the floor floating. I have one squeak when I walk on one spot on the floor, no big deal.

[roach711]

Either use tongue and groove plywood or leave a slight gap at the edges of your sheets. If the edges move against each other they'll squeak like mad.

[claydbal]

thanks guys, so it does sound like some body flex is gonna happen. would this be a good reason NOT to use styrofoam for insulation? please bear with me on all the questions, only time i have ever been on a bus was in 69 and i wasnt paying attention ! lol

[opus]

Nope...use it. I used 1.5" blue board on my floor.

[claydbal]

ok, got some celotex sheets for the floor. will cover that with plywood and caulk all the way around. should insulate and help deaden sound too! am i screwing up herre! any reason to not use celotex on top of the steel flooor?

thanks again