Browse Forums Landscape & Garden Design 1 Jan 14, 2024 6:08 pm Hi Brains Trust, We are considering laying some dark coloured cobblestones over a proposed concrete driveway. I have however, noticed too often, a white residue that comes out of dark coloured cobblestones that looks quiet unsightly - refer to photo. We have noticed this happens on new driveways too... Do you know what this is? How does it happen and why? Is there a way to prevent it? Thanks! Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Thankyou for your advice. We do have Caesar coming out and hopefully resolve the issue for us. 4 30884 2 16708 thanks. the above one is white Mat tiles and have gripness so going for this Mat tiles for both indoor and outdoor. Beaumont told it can be used in both indoor and… 2 12840 |