floor deflections

[tomh]

There are a number of cures for bouncing floors depending on your access to joists. Blocking can help distribute loads and prevent twisting of joists. This is a very effective way of getting the bounce out. If the joists are under-sized, lumber can be sistered to the sides of existing joists. This combined with blocking is the most effective approach. Problems are working around electric, plumbing and HVAC ducts. If you can post more details, concerning the floor construction, access, joist size and span we can be more help.