The demand for prefabricated countertops made of marble and granite is growing and with that so is the question of what exactly are prefabricated countertops? These particular slabs of stone are cut and finished before they shipped for installation, making them a snap to use at the construction or remodeling site. Contractors are required to give exact measurements of the design chosen by the homeowner or investor with the end product being prepared at the manufacturer. For more information, visit amckitchenandbath.com.