howdy, been dealing with this one alot lately here. "look, it doesn't really burn" yeah, well, see that thick black toxic smoke..... some people just don't understand. anyway, let me not digress to far herwe. the icc -es report is the place to get the info you need. i ask the contractor to supply all documentation. ( i usually find it before they ghet it to me, but thats another story)it will be specific to the type of insulation being sprayed. get a certificate on your installer, as well. . get that report, read up on the stuff, it'll say something like, " this product will comply with the code if a mixture of DCM-15 ( or some other letter /number combo) is sprayed over the enitre application at least 20 mils thick. ( some of this info i yanked from the icc-es report for a local job) for wording purposes only. goodluck partner