- DescriptionCaldera Grigia Pavers from MSI deliver the highly desired look of wood indoors and outdoors with the ease of maintenance and durability of porcelain. The soothing, modern light gray hue of the pavers works well with any design – from traditional to contemporary. Use the pavers for floors, wall applications, pool surrounds, and patios. Coordinating tiles and pool coping are available to enhance the luxurious feel of the indoor/outdoor spaces.