One. What should I do if the painted walls have peeling corners?
The primary cause of corner peeling on faux stone paint walls occurs when drawing lines along the partition strip. Specifically, when applying black lines, the partition strip can easily tear up the black primer. This issue can be attributed to several factors:* Low strength of the putty powder on the substrate.* Use of non-permeable sealing primers, which create a solid film on the surface.* Excessive adhesion of the tape paper.
Solutions: a、The substrate should be coated with a crack-resistant mortar, not ordinary exterior wall putty; b、Black lines should not be coated with ordinary solid-color primers or exterior wall paints, as these products become flexible and have high adhesion after film formation, which will inevitably tear the paint film; c、Use low-viscosity mesh paper for mesh treatment.
Two. What are the causes of peeling paint on walls when using imitation stone paint?
1、Reasons for Occurrence: When processing exterior wall substrates, common materials include exterior wall putty and exterior wall anti-cracking mortar. It is generally not recommended to use exterior wall putty for substrate preparation. Exterior wall putty has relatively weaker hardness and structural strength, making it prone to crumbling. After applying and smoothing exterior wall putty, followed by sanding, the putty layer's structure will be damaged, creating dust that can lead to peeling of the coating and substrate.
2、Solution: For exterior walls, applying artificial stone paint is common. Generally, applying anti-cracking mortar directly is sufficient. Anti-cracking mortar has a higher hardness and is entirely cement-based. After applying and leveling the mortar, remove the knife marks through sanding. Within three days, maintain the surface with watering and cleaning to remove any loose dust. Applying an anti-alkali primer provides the best results.
III. How to address wall cracking issues
1、Causes: Cracks in walls typically fall into three categories: substrate cracking, mortar cracking, and coating cracking. The causes of substrate cracking are related to the structural design, mortar cracking is caused by defects in the construction process, and coating cracking usually occurs on flat surfaces.
2、Solutions: The problem of substrate cracking cannot be solved by decorative construction and coating construction. To prevent cement cracking, it is necessary to ensure that the fiberglass mesh is applied correctly when troweling the cement layer, and it is also recommended to start making deep grooves and partitions when applying the cement layer to consider the function of expansion joints. The texture imitation stone paint coating generally does not appear to crack, and the cracking of colorful paint on the surface is usually caused by the inconsistency between the hardness of the topcoat and the colorful paint. High-hardness topcoats (such as Kubba Nano Swirl Self-Cleaning Coating) should be applied thinly.