Cileing soud prooding?

When building a sound proof room has anyone tried using "Roxul Insulation" on the ceiling? If so, how has it work out for you?

I'll let you know in about a week. :) I finally start insulating the ceiling this week after 3 months of building up the mass between my ceiling joists and completeting the HVAC. Vince

Roxul is a brand, so you'll need to be more specific with the exact type of insulation you plan to use. For example, there's Roxul Acoustical Fire Batt (AFB).

Would u be able to recommend a type, that has been effective for you?

Roxul is what I've used in my construction: http://www.roxul.com/sw34142.asp Here is the link to my thread... http://www.johnlsayers.com/phpBB2/viewtopic.php?t=839 The main pictures start somewhere around page 10...

If you have a tough time getting your hands on Roxul Acoustical Fire Batt (AFB) - ≥2" (2.5 pcf), a similar/competing product is Thermafiber Sound Attenuation Fire Blankets (SAFB) - Nominal Density (2.5 pcf).

Also, for inside of walls/ceilings if you can't find the heavier stuff the normal, fluffy fiberglass insulation will come within 1 or 2 dB of the same performance; it's only in the room itself where the higher density stuff makes much difference... Steve