I'm in the process of building a sealed sub enclosure for my 2013 LSV. I'm using 3/4 birch ply, and planning on coating with bedliner.

My boat has the hump that is made of fiberglass, not carpet. My plan is for the bottom of the enclosure to sit on the hump, anchored by l-brackets. It will follow the angle of the hump. I'm going to have a facade with either carpet or vinyl covering the front.

My question is, do I need a dampener (carpet or foam strips) between the bedliner of the enclosure, and the fiberglass hump? I'm just wondering if these surfaces will cause a bit of rattling. The enclosure will be several inches above the floor, so moisture shouldn't be a problem.