Thanks for the patient answers over the last couple of months.
I guess I wasn't too clear on questions #2 and #3. The rockwool I have is only
5cm thick, so I'm hoping to laminate it to achieve a greater thickness. I've gleaned from
other threads and articles that the thing to do is to apply a dilute white glue (aka
carpenter's glue, pva adhesive) mixture to the rockwool to bond two pieces together.
So #2 means: can I expect to hold one piece of this heavy stuff to another simply
by spraying some dilute pva adhesive on them and pressing them together? I'm guessing it
won't be strong enough.
I've since read in another online tutorial that the
goal of using the dilute glue mixture was merely to prevent rockwool fibres from going
airborne, not to hold slabs together, so I might be totally out to lunch here.
And #3 means: Far from having the goal of reflecting high frequencies, I was worried
about creating an air-impassable layer and impeding the bass-trapping efficiency by
putting a thick white glue mixture in between layers of rockwool, or coating it on the
Still tossing over designs in my mind. Good to know anyways that
the rockwool isn't too dense!