If the wall putty is scraped too thick, the drying process is easy to surface dry but not dry inside, resulting in cracking or bulging. To avoid this problem, each layer should be thinly scraped (less than 2 mm) and the next layer should be scraped after it is completely dry. Environmental factors such as excessive ventilation can also lead to drying and cracking, so moderate ventilation should be maintained. Poor quality putty or improperly treated substrates can also cause problems. Ensuring that each layer of putty is properly dried and the substrate is properly treated can effectively prevent cracking.
| Issue | Cause | Solution |
|---|---|---|
| Putty Layer Cracking | Applied too thickly, surface dries faster than inside | Apply layers no thicker than 2mm; ensure full drying before next layer |
| Bulging and Peeling | Improper substrate treatment | Properly prepare and wet the substrate for better adhesion |
| Dry Cracking | Overly dry environment or excessive ventilation | Maintain moderate ventilation, allowing natural drying |
| Poor Putty Quality | Low-quality putty or poor crack resistance | Use high-quality putty products |
| Adding Other Materials | Unapproved additives altering putty properties | Only add water to putty, avoid other materials |
1. Too thick a layer of putty: Too thick a layer of putty will result in fast drying of the surface and slow drying of the interior, resulting in stress difference and hence cracking. It is recommended that the thickness of each scraping is less than 2mm and ensure complete drying before proceeding to the next layer.
2. Addition of other materials: Putty only requires the addition of water. Unauthorized additions may alter the properties of the putty and result in a loss of cracking resistance.
3. Environmental factors: Dry environment or excessive ventilation will accelerate the evaporation of surface moisture and cause the putty layer to crack. Therefore, the construction should be kept moderately ventilated, mainly natural drying. 4.
4. Improper grass-roots treatment: If the grass-roots level is not properly treated, such as not fully wet or poor sealing, putty and wall combination is not firm, will also trigger cracking. Grass-roots level should be handled in strict accordance with the specifications to ensure that the putty and the wall effectively combined. 5.
5. Product quality problems: Using poor quality putty or putty with poor anti-cracking properties may also lead to cracking. Choose high quality putty products and make sure that each layer of putty in the construction is evenly and thinly scraped.
Summarize
The main causes of cracking of putty layers are excessive construction thickness and improper treatment of the substrate. These problems can be effectively avoided by strictly controlling the scraping thickness of each layer and the preparation of the base. If you encounter other situations, you should take appropriate measures for specific problems or seek professional help.
There are many other reasons for cracking, the specific situation needs to be treated specifically. Contact Xingmu, our mechanical engineer will help you solve the problem for 1 on 1!
