I haven't actually started putting together my HT room yet, but I wanted to get this answered before I did any work I might have to repeat. Basically the question is: do the walls, ceiling, and wood floor of a room flex based on SPLs during HT use? In other words, does the sound make the walls bow out during loud passages? And if this is true, has anybody experienced any long-term damage, such as popping nails, detriorating drywall, etc? Should these rooms be made especially strong as compared to other rooms in the house? Hope this makes sense. Thanks for any help. Chris ------------------ Christian A. Sonntag "The world owes you nothing. Take responsibility for your own actions!"