The gutter is a common feature visible on all types of buildings, old and new. Its use is of recognized utility on several levels. Above all, it serves as a means of intelligent evacuation of rainwater and thus prevents water infiltration and its accumulation at the foundations. Well installed, the gutter avoids cracks in the concrete and the appearance of mold. But, in order to take full advantage of the benefits of the device, it should be dealt with properly.