Water stone base treatment
Before applying the base layer, it is essential to thoroughly clean the surface, removing any loose debris, dust, or contaminants. All scaffolding holes should be properly filled and sealed to ensure a smooth and even base. The wall surface must be flattened and brushed to create a uniform texture. Any honeycombing or uneven areas should be carefully brushed out, and all corners should be treated to prevent cracking or delamination.
A cement slurry with a ratio of 1:1 should be applied first, followed by a 1:3 cement mortar in layers. This ensures proper bonding and structural integrity. When working on concrete walls, the surface should be cleaned according to the type of release agent used during pouring. If an oily release agent was used, the wall should be washed with a caustic soda solution, then rinsed thoroughly with water to remove any residue.
For smooth or glossy surfaces, such as those found on some types of concrete, it is recommended to chisel the area lightly to create a rougher texture. This enhances the adhesion between the plaster and the wall, reducing the risk of peeling or blistering over time. Proper preparation is crucial for ensuring long-lasting results and a professional finish.
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