How to deal with cracks in decoration walls
Wall cracks are a common problem after renovation. They not only affect the appearance, but may also hide safety hazards. In response to the decoration issues that have been hotly debated across the Internet in the past 10 days, this article has sorted out the causes, treatment methods and preventive measures of wall cracks to help you deal with them easily.
1. Common types and causes of wall cracks
| Crack type | Main causes | prone location |
|---|---|---|
| structural cracks | Foundation settlement and uneven stress on load-bearing walls | Corners, junctions of beams and columns |
| temperature crack | Material expansion and contraction | Exterior walls, doors and windows |
| shrinkage cracks | Cement mortar dries too quickly | New wall |
| construction cracks | Improper material ratio or irregular workmanship | Putty layer, latex paint surface |
2. 6 Steps to Treat Wall Cracks
1.clean cracks: Use a shovel to expand the crack to the V-shaped groove and remove floating dust and loose objects.
2.filling material: Select the caulking agent according to the width of the crack (epoxy resin glue is recommended to treat cracks larger than 2mm).
| crack width | Recommended materials | Curing time |
|---|---|---|
| <0.5mm | Elastic putty | 2-4 hours |
| 0.5-2mm | cement based repair paste | 24 hours |
| >2mm | Epoxy resin + fiberglass mesh | 48 hours |
3.Reinforcement: Paste the anti-crack mesh cloth (it is recommended to exceed the edge of the crack by more than 5cm).
4.surface leveling: Layer-by-layer putty (thickness of each layer shall not exceed 1.5mm).
5.polishing: Use 240 grit sandpaper to finely sand.
6.Restore decorative layer: Repaint latex paint (it is recommended to repaint the entire wall to avoid color difference).
3. 5 key issues hotly discussed across the Internet
| Hot search questions | Professional answers | Amount of related discussions |
|---|---|---|
| What should I do if the crack cracks again after repairing it? | Basement problems need to be solved first. If there are structural cracks, please contact the property management company. | 32,000 items |
| Can cracks be treated in winter? | It is recommended that the room temperature is >5℃ for construction, otherwise it will affect the solidification of the material. | 18,000 items |
| Can wall coverings cover cracks? | Temporarily effective, but underlying problems will be transmitted to the surface | 24,000 items |
| Does new nanopatch work? | Suitable for tiny cracks, load-bearing cracks still require traditional techniques | 9500 items |
| How do developers protect their rights during the warranty period? | Keep image evidence in accordance with the "Quality Warranty Measures for Housing Construction Projects" | 47,000 items |
4. Three key points to prevent cracks
1.Basic treatment: It is recommended that new houses be fully covered with fiber mesh, and old houses need to completely remove the hollow layer.
2.Material selection: Use flexible putty (elongation ≥ 150%), preferably elastic paint for latex paint.
3.construction control: Ensure that each process is completely dry, and transition processing is required at the joints of different materials.
5. Expert advice
Data from the China Building Decoration Association shows that 90% of wall cracks appear within one year after renovation. It is recommended to conduct seasonal observations after completion (especially when the rainy season and heating season alternate). For cracks that continue to expand (width >3mm or extend >5cm per month), you must contact a professional agency for structural inspection.
Through systematic analysis and correct treatment, most wall crack problems can be effectively solved. It is recommended that owners set aside 5% of the maintenance fund during renovation to deal with such common quality problems.
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