The green on your walk is algae, and it isn't sitting on top. Concrete is full of tiny pores, and the growth roots down inside them. That's why a plain water blast looks clean for a bit, then the color climbs right back. The top got rinsed, but the pores stayed loaded. Walks and steps that sit in tree shade never get a full dry-out here, so the pores fill back in fast. So we kill the growth in the pore first, then wash, then treat again on the way out. The slab dries even, and it stays that way longer.
Cayce sits on the west bank of the Congaree River, straight across from downtown Columbia, on some of the lowest, flattest ground in the Midlands. The heart of it is the Avenues, a grid of bungalows and brick ranches built in the 1940s and 50s when veterans came home and the Blossom Street bridge tied Cayce to Columbia. This is old brick country in the most literal way: the Guignard family dug clay out of these river bottoms for two centuries, and the beehive kilns of the Guignard Brick Works still stand near the river. The Cayce Riverwalk and the wooded Timmerman Trail run along the Congaree, and the river bottom keeps the ground and the air damp, so shaded lots in Riverland Park and the Avenues hold moisture long after the rain stops. Newer subdivisions like Hunter's Mill and Moss Creek fill in toward the south end of town.
In Pinewood, Hunter's Mill, and Edenwood, or anywhere else around Cayce, we come to you for concrete cleaning, no trip fee.