Quote:
Originally Posted by danbronson  it seems Rockboard 60 might be the best for low end absorption however. |
We are writing about bass traps. Assuming that he will use at least 4" (100 m) thick material, 60 is actually slightly worse than 40, or going thicker 25 Rockboard. This is not an intuitive concept. The best I suggest to try and explain it is
this thread.
All other things being equal, which they rarely are in prices of insulation, the price varies as a direct function of density. Bulk orders, overstocks, leftovers from orders make the price relationship a wild card. The good news is that the difference the 25, 40 and 60 acoustically is so small that the choice can be made on the basis of price and not have to worry about performance. Of course Safe n Sound is 1/8 to 1/12 the price of Rockboard. That has been the range here in Hamilton.