Oren wrote:
On Thu, 18 Oct 2007 18:54:31 -0500, "HeyBub"
wrote:

Wooden flooring is generally glued to some sort of cushion and the
cushion is glued to the subfloor. If the wood is glued directly to
concrete, something's gotta give as the humidity changes. I've heard
a wooden floor may expand as much as 1/2" inch as the humidity goes
from 30% to 60%.


Some quality glues have a moisture inhibitor/blocker.

Right. I was refering to humidity in the AIR.