When it comes to interior decoration, wall treatment is an indispensable part. The use of putty powder is particularly crucial, as it provides us with a smooth and delicate wall surface that provides a solid foundation for the final paint or wallpaper job. However, during the construction process, we often encounter the situation that we need to apply putty to the wall surface that has already been sanded. So, after the wall putty is polished, can we directly batch the putty again?
The purpose of wall putty sanding
Why do you need to polish wall putty? The main purpose of sanding is to remove the unevenness of the putty surface, including air bubbles, putty knife marks, etc., to ensure that the wall surface is flat and smooth. In addition, proper sanding can also increase the adhesion of the wall, creating a good foundation for subsequent decoration processes.
Is it possible to re-batch putty directly?
In most cases, for the putty wall that has been polished, it is possible to directly batch the putty again. This step is usually based on several considerations:
1. Repair defects: Even after careful construction and polishing, there may still be some minor imperfections or unevenness in the wall. Re-putty can be used to repair these problems and ensure that the wall is in ideal condition.
2. Enhance the effect: In order to achieve a smoother and more delicate wall effect, or because of specific decoration needs, the second batch of putty can improve the quality of the wall.
3. Improve the foundation: Sometimes the base layer may not be firm in the initial putty process, and after sanding to remove the unstable parts, the re-batch putty can strengthen the stability and durability of the wall.
The process flow of wall batch putty
1. Preparation.
Before starting to batch putty, you need to do some preparations, which is the basis for ensuring the smooth progress of the batch putty work.
Clean the walls: First of all, make sure that the wall is clean and dust-free, if there is old paint, wallpaper, etc. on the wall, it needs to be completely removed. Use sandpaper or a sander to smooth out the wall, removing any bumps and unevenness.
Mend cracks: Inspect the walls for cracks or cavities and fill them with appropriate filling materials. Make sure the filling is even, and after drying, it is sanded again and smooth.
Grassroots treatment: For walls with strong water absorption or unevenness, it is necessary to use an interface agent or sealing primer to treat it to enhance the adhesion and waterproof performance of the wall.
2. Choose putty powder.
There are many kinds of putty powder on the market, and choose the right putty powder according to the specific situation of the wall. Ordinary putty powder is suitable for indoor walls, while waterproof or moisture-proof putty powder is suitable for humid environments such as kitchens, bathrooms, etc.
3. Prepare putty slurry.
Proportionally formulated: According to the instructions on the putty powder package, mix the putty powder with water in proportion. Use a blender to stir until there is no particle, let it stand for a few minutes and stir again to ensure the uniformity of the putty slurry.
Precautions: When preparing putty slurry, it is necessary to ensure that the amount of putty prepared at one time can be used up in a short time, so as to avoid the putty slurry from drying and hardening.
4. Scrape putty.
The first batch of scraping: Use a batch knife to evenly scrape the putty slurry on the wall, and the strength should be uniform to ensure that the thickness of the putty layer is consistent. The first batch scraping should not be too thick to avoid cracks.
Inspection and sanding: After the first coat of putty has dried, use fine sandpaper to gently sand the wall to remove unevenness and excess putty.
Repeat batch scraping: Depending on the actual condition of the wall, it may be necessary to scrape it multiple times. Wait for the putty to dry completely between each batch scraping and allow for a slight sanding.
5. Grinding and cleaning.
Meticulous grinding: After the last putty has dried, you need to use a finer sandpaper to sand it thoroughly until the wall is smooth and smooth.
Clean thoroughly: After sanding, use a damp cloth or professional cleaning tool to clean the wall to ensure that it is dust-free.
6. Inspection and repair.
After all the putty processes have been completed, the wall surface needs to be thoroughly inspected and any unevenness or defects need to be repaired. Make sure the walls are in the best condition before moving on to the next step of the renovation work.
Precautions for batching putty again
While it is possible to re-batch putty directly, there are a few important considerations to follow to ensure the best results:
1. Clean the wall before batch putty: Before you start to apply putty again, you must make sure that the wall is clean and dust-free. You can use a damp cloth to wipe it gently, or vacuum it off with a vacuum cleaner.
2. Check the dryness of the wall: The wall needs to be completely dry. If the previous sanding work was wet sanded with water, be sure to wait for the wall to dry thoroughly before proceeding to the next step.
3. Choose the appropriate putty powder: According to the specific situation of the wall, choose the appropriate putty powder. Interior wall putty powder is generally used for indoor walls, and for areas with heavy moisture, special putty powder that is moisture-proof or mildew-proof should be selected.
4. Control the thickness of the putty layer: When batching putty again, try to control the thickness of the putty layer to avoid cracking or falling off due to excessive thickness. Under normal circumstances, the thickness of each batch of putty should not exceed 1mm.
5. The wall should be fully polished: After the second batch is greasy and dry, it is also necessary to polish it carefully. This step is the key to ensuring that the wall surface is flat and smooth.
Summary:
For putty walls that have already been polished, it is completely feasible to directly batch putty again. This step helps to repair blemishes, enhance the quality of the wall, and lay a solid foundation for the final finish. However, in order to ensure the success of the job, there are corresponding precautions and steps that must be followed. Through careful preparation and meticulous operation, we can obtain satisfactory and durable wall decoration results.