Adding soundproofing under integrated washing machine

This thread was marked as solved. Here's a summary of the problem and the fix, generated from the discussion below.

Integrated washing machine noisy and vibrating due to cut-outs around feet

The problem

An integrated washing machine was reported as loud and prone to vibration, with noise being noticed by the neighbour below. The installation appeared to have sections cut away under the machine feet rather than a continuous floor beneath it.

Likely cause

The strongest diagnosis in the discussion is poor installation support under the washing machine feet. The cut-away sections would leave less floor between the machine and the flat below and were said to be likely to worsen transmitted noise and vibration.

What fixed it

Recommended action was to fill the holes/cut-outs under the machine so it sits over a more complete base, then add washing machine noise-reduction feet, a noise-absorbing mat, or both. The original poster agreed that adding extra wood flooring below and noise-reduction feet should help, but no completed repair was confirmed.

Checks to try

• Visual check showed sections cut away for the washing machine feet
• Original poster confirmed there was space above the appliance, so reduced height did not appear necessary

Parts or tools mentioned

• Extra wood flooring/base infill
• Noise-reduction washing machine feet
• Noise-absorbing mat