Browse Forums DIY, Home Maintenance & Repair 2 1249 Have some black tiles in our bathroom on one feature wall laid on top of the waterproofing. What I think is efflorescence or white chalky looking grout has turned the… 0 2141 Hi Everyone, Ripped up the carpet and the surface below gas come loose and you can see the slab below. The material breaking away looks and feels like crumbling cement.… 0 10364 |