Hello!

Has anyone tried building something that is sound and/or vibration dampening for a washing machine and dryer? For example, using multiplats/lightweight concrete??? How did you do it?

Our problem is that we have a crawl space foundation and all the sound generated inside the laundry room, as well as the vibrations (both the noise and the actual shaking), propagate through the foundation and make us hear it everywhere.

Other suggestions than a multiplat construction are also welcome! :)
 
The wooden frame is the problem. Tighten it up. You can also add a spring suspension to the setup.
 
Placing on concrete slabs might work?
 
It makes me think of a vibrating machine that is available at the gym. You place it on foam mats of different kinds, even sleeping pads or yoga mats, to dampen the vibrations. It makes a big difference. Could this be something for a vättmaskin?
 
Hm...

Thanks for the suggestions. "Kolva upp trästommen" I have no idea how to do. Sounds tricky.

Concrete slabs = lightweight concrete. That's what I'm asking for. My thought was that maybe you can buy reinforced lightweight concrete slabs (since the wooden floor can cause regular ones to break) and place them underneath.

I'm just wondering how good the concrete is at removing vibrations and sound? Gypsum boards remove quite a bit... so shouldn't the dead concrete also do it?

We currently have a few white lumps under the washing machine feet (vibration dampers) - which should resemble what you're writing about, Marlene. They make a difference, but the sound still propagates.

More suggestions or tips are welcome!
 
It is such that a washing machine with 5 kg of wet fabric that spins generates a certain vibration at a given frequency. This frequency should be dampened. With suspension that is too weak, the vibration can increase, and the same if it is too stiff.

Concrete requires a slab to be cast, say 600x600x200, to achieve reasonable effectiveness. This causes issues for the timber beam floor.

What I mean by adding beams is tearing up the floor and nailing battens between the floor joists to stiffen the construction. But first, try buying a stiff rubber mat/EPDM. It should handle the weight from the washing machine, say 50 kg/foot in point load, plus additional moment, say 100 kg more/leg, without being compressed. You can also place the machine on a nailed foundation. Gather 45x95 battens in a square, say 700x700 or something, with 10 cm between them. Throw on 22 mm plywood. On the underside, glue EPDM rubber or similar. Then place the washing machine on this package. It may help and create a certain box sound in the container you've made. It is possible to eliminate it with some insulation.
 
Placing on concrete slabs, such as patio slabs, means that more mass must be moved for sound to propagate. Even better is if they rest on rubber (the slabs, that is).
 
EPDM rubber is not a good vibration isolator. It should be natural rubber or SBR. As "zankan" rightly says, the hardness and the damper's surface must be adjusted to the weight that needs isolation. The problems are probably greatest at about 800-1000 revolutions on the centrifuge. Let us know the weight of the machine and the speed that causes the most vibrations. As v-g says, it is also an advantage if there is a large mass under the machine to which the force is transferred if the machine is poorly isolated, but concrete or similar must also rest on rubber. The original dampers are usually far too low to handle the vibrations. (I work in the rubber industry)
 
OK, thank you! Awesome.
I'll look around a bit and then we'll see which solution I go with. After the laundry room renovation, I'll post pictures here. (It might take a while - we're working on the upstairs now, but one can't be without a project so I need to plan for the laundry room now, I feel.) :)
 
We divided our laundry room and integrated a third of it with the hallway. There, we have laid tiles according to all the customary standards (new joists between the old ones to get 30cc, heating chipboard, Sepro 626, floor plasterboard, and tiles). We set the last part of the tiles yesterday, so today we had time to wash... It is an old house, circa 1905, and the washing machine is a couple of meters away from the new tile floor, on the old joists which also extend under the tiles. I hadn't given this a thought until I heard the centrifuge and realized that the whole floor actually vibrates when it runs. We hadn't planned to do anything about the floor in the laundry room and intended to leave the vinyl flooring as it is, but we might need to address this somehow? There is a basement under the floor. Any suggestions?
 
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