Riven Slate Patio Left Covered in Grout Smears By Northans Builder Restored June 29, 2017 | 1 Comment | Cleaning Slate Floors, Restoring Slate Floors, Riven Slate, Slate Patio Renovation This customer, who lives in Wollaston, a small village in Northamptonshire, called me to look at the unfortunate condition of her Riven Slate tiled patio. […]