Is it good maintenance practice to pressure-wash stone paving?
No. Don’t pressure-wash more than two or three times a year. The pressure will push water through a grout joint, and it will weaken a caulk joint. If you must use a pressure washer, keep away from the stone joints. Q: We are planning to use marble to face a 300’-high office building. The building code requires a minimum stone thickness of 1 5/8″. We have not decided as to whether the 5 – 0 dimension will be the width or the height, and we are considering using a hand-set method or panel system, either bonded or with a bond break. Please advise us how thick the stone should be for this size panel, and the size and location of the required anchors? A: The thickness of the stone, and the quantity and location of the anchors are related matters. The anchor requirement cannot be determined until the thickness of the stone is established, and the panel system selected. The thickness of the stone cannot be determined until the relevant ASTM test results are performed. Q: We use a local method
