Open Cell Spray Foam Insulation by itself will not met Building Code requirements of a vapor retarder (i.e. having a perm of less than 1.0). Building Code requires a vapor retarder on the warm side of the wall (i.e. on the inside). If the vapor retarder is not addressed during the construction process, the open cell Spray Foam Insulation can fail and lead to larger problems (see article: Open Cell Failures).

When looking for your Spray Insulation contractor in the Chicago Illinois area please use our site as a reference point for all your questions and give us a call. We take pride in our work and services and are well respected throughout all of Illinois.