Bubbling during putty construction is a common problem. The main reasons include improper base treatment, putty material problems, non-standard construction operations, and environmental factors. The following are the specific reasons and solutions:

 1. Grassroots issues

    Cause: The base layer is uneven, has holes or is loose, which causes the putty to be unable to adhere evenly and air is trapped to form bubbles.

    Solution: Before construction, ensure that the base is flat and solid, and fill the holes and cracks with cement mortar or repair agent.

  2. Putty material problem

   Cause: The putty is of poor quality or unevenly mixed, containing too much air, which leads to bubbles during construction.

  Solution: Choose high-quality putty, control the speed and time when stirring, and avoid introducing air through excessive stirring.

 3. Improper construction operation

  Reason: The putty layer is applied too thickly or unevenly at one time, which makes it impossible for the air inside the putty layer to be discharged.

  Solution: Apply thin layers multiple times, keeping the thickness of each layer within 1-2 mm, and make sure each layer is completely dry before applying the next layer.

 4. Environmental factors

  Cause: When construction is carried out in an environment of high temperature, high humidity or poor ventilation, the putty dries too quickly or too slowly, which can easily cause bubbles.

   Solution: Avoid construction in extreme environments, maintain good ventilation, and control temperature and humidity.

 5. Tool issues

   Cause: Using inappropriate tools or unclean tools results in uneven putty application or the introduction of impurities.

   Solution: Use a suitable scraper or trowel and keep the tools clean.

 6. The moisture content of the base is too high

   Cause: The moisture content of the base layer is too high, and bubbles are formed when the water evaporates.

   Solution: Before construction, ensure that the base is dry and the moisture content meets the requirements (usually less than 10%).

7. The putty layer is not completely dry

   Cause: The next process is carried out before the putty layer is completely dry, causing the internal moisture to evaporate and form bubbles.

   Solution: Wait until each layer of putty is completely dry before proceeding to the next step to avoid rushing construction.

 8. Poor adhesion between putty and base layer

   Reason: The putty is not firmly bonded to the base layer, and air enters to form bubbles.

   Solution: Apply interface agent before construction to enhance the adhesion between putty and base layer.

9. Putty contains volatile substances

   Reason: Some putties contain volatile substances, which evaporate during the drying process to form bubbles.

   Solution: Choose environmentally friendly putty that does not contain volatile substances.

  Summarize

  There are many reasons for putty bubbling, which need to be addressed from the aspects of base treatment, material selection, construction operation and environmental control. By standardizing construction and selecting appropriate materials, bubbling can be effectively reduced to ensure a smooth wall surface.