Covering Illinois, Wisconsin, Indiana for More Than 20 Years! If you need to replace your roof yet again, why not try something new? Metal roofing has quickly become the preferred roof among Illinois, Wisconsin, and Indiana’s home owners. There are numerous advantages to metal roofing, and the experts at Custom Construction Systems have the experience to install or repair your covering with ease. For more than 20 years, Custom Construction Systems has been the go-to roofing expert for residential and commercial roofing needs.