We are in the middle of our first self build. I am about to start insulating between the I-beams that separate the two floors. But I am struggling to know which would be the best acoustic insulation to go for.

There seem to be a few different brands out there. Is there much difference between them? The minimum we have to install is 100mm. Is this sufficient, or is it worth spending extra money on thicker stuff? Also are slabs or rolls best? There are a few pipes and cables to negotiate. Do I just compress it up to them? Thanks.