Comments on Profile Post by LetMeBeFrank

Depends on whether the rattling is caused solely by vibration of someone walking past or by the floor bouncing. If the rattling is caused by the floor joists bouncing under foot, then I don't think it'd help, unfortunately.

If you happen to find that it is due to the floor joists bouncing, if you have access to the floor from a basement or crawl space you can install joist bridging to help stiffen the floor and mitigate the bouncing.

I have an unfinished basement with 8ft ceilings. It's probably the floor bouncing.

Old houses can be weird. @SeanT could be right on, or it could be the floor boards themselves flexing on top of the joists. A pole jack right under the cabinet might be simpler than bridging

I think the bottom line here is you don’t want your midnight liquor raids to be heard.

Both are in high traffic areas and the rattling is starting to drive me nuts.

Let me know what you find. We have old sprung wooden floors that flex in our new place (that is about 2 weeks + lockdown away from being renovated - thanks, lockdown) and I'm thinking the same issue will bug me there. There's certainly no sneaking around the house, that's for sure.

Dynamat under the rugs? :)

If you just put sorbothane on the China, that will fix it. It will create a lot of other problems though, like using, washing, and looking at the China.

Hell, if you've gon an unfinished basement I'd definitely try tossing some bridging in there. You can get metal cross bridging for super cheap and it installs fast and easy. If you go that route, try to install it close to the location where the foot traffic occurs rather than right under the cabinets to spread the dynamic load out.

@ergopower's suggestion of a pole jack in addition to the bridging should eliminate the issue if bridging alone doesn't quite nail it.

For a china display cabinet, where things are rarely moved or taken out, you can secure everything with Blu Tak. https://www.amazon.com/Bostik-Mastic-Adhesive-approx-801103/dp/B00I42EOJE/ref=sr_1_2?dchild=1&keywords=blu+tak&qid=1586865605&sr=8-2 ...

For the liquor, you could try lining the shelves with silicone mat like this: https://www.amazon.com/Silicone-Counter-Resistant-Tablemat-Placemats/dp/B07D9CTW2B/ref=sr_1_39?dchild=1&keywords=silicon+kitchen+mat&qid=1586865845&sr=8-39 It should easily absorb vibrations, but actual movement might be amplified, as you would now have the bottles on a soft surface.

Try all the cheap'n'easy before getting structural!