As stated in the regulation in Article 2 of CPR 305/2011/EU, a construction product is defined as any product that is to be permanently placed into a construction work (building construction or civil engineering) which has an effect on the performance of the construction work. The product can be in the form of a single product or a kit of products meant to be used in unison. There are 35 areas of classification for a construction work. All products are to be classified into one of the classifications and tested based on the requirements of each classification. The product must comply with the essential characteristics of a construction product.