And 1 8 underlay combination offer a reduction of 67 db 43 db and 22 db.
Iic rating of cork flooring.
Higher end units often expect iic ratings between 55 65.
Further complicating matters is the effect that poor construction techniques may have on the field iic performance of your flooring assembly.
150 forna 1 8 cork underlayment has been tested that shows the sound rating.
12 worth of acoustic insulation iic 39 on 6 concrete without suspended celling iic 53 on 6 concrete with suspended celling stc 40 on 6 concrete without suspended celling stc 54 on 6 concrete with suspended celling.
As you can see the choice of subfloor ceiling system combined with the type of flooring structure has a major affect on the value of the impact sound.
A rating of 1 indicates that the sound energy is perfectly absorbed by the material which creates a quiet environment.
Nrc rating or noise reduction coefficient.
Resilient flooring containing a foamed layer yields a higher better iic rating than one without it.
This results in a louder environment.
Amorim provides solutions to multi family building code iic ratings with lvt a few years back before lvt was on the front page of every publication related to the flooring industry we had an inquiry from a company in regards to an impact sound solution for vinyl plank flooring.
The highest rating is iic rating 65 which includes cork flooring and carpet.
So before asking for a product with an iic rating we need to know what the subfloor ceiling system is.
Iic values and our floors.
Also remember that field iic ratings aiic or apparent impact insulation class per astm e1007 and lab iic ratings per astm e492 can vary depending on a number of factors.
Our cork floating floor.
A rating of 0 means that sound energy perfectly reflects off of a surface.
The thicker the system the better the iic rating.
The international code council recommends that an acceptable level of performance for both stc and iic is 55 52 f iic.
More typical values fall between 35 and 55.
And 1 8 cork underlayment offers a reduction of 48 db 23db 13db and 10mm and floating cork flooring offer a reduction of 16db and 19db.
The preferred level of performance for stc and iic is 60 57 f iic.
Different systems different numbers.
This is measured on a scale between 0 and 1.
For multi family structures some codes require an iic of 50 or more when tested in the laboratory or 45 or more when tested in the field.
The impact creates vibrations that travel through the flooring and produce sounds on the other side.