RESCheck online report preparation! With over 30 years of experience, we help home builders obtain their required building certificates that will meet certain insulation requirements based on local building codes. A REscheck is a document that describes the overall efficiency of the insulation in your building. If it does not meet the overall efficiency that is required by code, it will fail and you will not get a building permit. A REScheck report is an analysis of your project's design which documents that your residential building will meet or exceed the energy conservation standards of the International Energy Conservation Code (IECC) developed by the International Code Council. You submit the building plans, we take care of the rest!