For many Singapore homeowners, the textured walls of older HDB flats may spark memories of the distinctive grainy surface known as Rockstone finish . Originally applied using a high-pressure spray gun, this textured cement coating was once a practical, widely used wall treatment across HDB interiors. Today, Rockstone is appreciated not just for nostalgia, but also for the character and depth it can bring to modern spaces — especially when done with professional care. What Is
