Limestone, Renaissance stone, Cultured stone, Sandstone, Terra Cotta are different types of stone facades that Arrow repairs and replaces. Stone is particularly porous and special attention is needed to maintain it. Most often stone becomes discolored or dislodged and Arrow is contacted to clean, patch, reset or replace it. Another common threat to stone facades is de-icing salts. The salts etch and erode the surface of the stone and wear down its integrity. After the stone is properly repaired or replaced, Arrow usually follows up with a waterproofing treatment to slow down the intrusion of the water and chemicals.