Maybe do a mini-split system in the basement so your tenant can control their own heat and AC. Delta IIC literally means the Change in Impact Insulation Class. However, not every situation requires considering those things as they are presented, nor are those three things adequate in other situations. How to Silence Loud Buzzer of Stacked Dryer and Washer? Depending upon your specific needs, you can choose panels, drywall or plywood for soundproofing your room against airborne noises. Use Interlocking Floor Mats . With respect Virgil you are simply not correct. Delta IIC does not relay on the SYSTEM...it only relies on the MATERIAL (cork+floor). Your neighbors may like to play loud music in the morning or evening which may interfere with your beautiful mornings and evenings. But that is because building designers have enough stuff to deal with without getting into the physics of mechanical waves when designing a building. Therefore 8mm of rubber (at $5+ per square foot) = 12mm of cork ($1.49/sf from iCork Floor LLC). Please note the many times flanking transmission was talked about in this thread. The main thing you want to be careful of in SoCal is with staggered stud batts exterior walls that your pro designs/builds the exterior wall profile well for your micro climate. Whether someone is right or wrong is independent of their training. ... Spray foam can be used for new or existing construction applications, and are fire retardant. Soup CAN = metal. proprietary resilient suspension system link. It starts to get "efficient" about the 2000hz range. And because they are Delta IIC ratings they are SUPPOSED to be additive...that's the advantage of them. Even though how to soundproof between the existing floors is a bit difficult than soundproofing in new construction. It doesn't work unless the string is tight. It allows 1/4" or even 1/2" cork underlay to be used. But then, how will one contact the next floor for a bowl of Wheaties...? Some of the best sound sharers are metal ducts/pipes. Sound is easy to understand as work, as sound encounters various forms of matter it expends effort to move through the material, even air, that is why decibels are lessened over distance. We did find out (from what was sent for the appraisal) that each floor (basement, main floor, 2nd floor) will have its own HVAC. I've figured out that it is a 3:2 ratio. At least half of the acoustic rating for roxul comes from the 2 layers of 5/8" Type X gypsom board...with which it was tested (wall assembly). I've read up on noise reducing 'insulation' materials to be used between the joists in the lower ceiling. Foot steps are dampened by only 1 thing: carpet pad. White noise can be as simple as sound from a fan or a full room white noise machine like this one. When you are trying to soundproof your room between floors, you need to tackle noise from both air and solid surfaces. footsteps or an object being dropped, see Figure #1 below). It is easily renewable resource without off gassing. In our current house (on crawl space) we got rid of the carpet and did sheet vinyl with luan over the OSB sub floor. For a MIL siute, 1/4" steel plate works well. Quietrock is a brand. So far as I can see all three items of sound transmission have been extensively addressed. Be prepared to spend more than a traditional hardwood floor installation in a regular home. I really think we would. Seal all holes in ceiling / floor with caulk or spray foam, 2. Soundproofing Material For New Construction There isn’t a “one-shot” soundproofing strategy, so understanding the concepts of noise and the wide variety of options for soundproofing materials will help you engineer the perfect solution given your unique building scenario and environment of the new construction. And… perhaps not as easy to do anything about but…, 5. But you can simply just figure out where the noise is coming from and figure out the type of material your floor is made up of and get to work. The only left was the "yelling" from one room to another. You will feel a noticeable difference. The complete setup is effective against impact and airborne noise. Can we finally put the soundproofing of cork to bed? You will need to remove even wood furring strips from the joists. Make sure they are tightly screwed to the furring strips. Remember playing "telephone" with soup cans and string? I like to classify the noise into two categories so that it becomes easier for me to explain. This makes a surprising difference.