During decoration, wall treatment is a crucial step that cannot be avoided, and the use of putty powder is directly related to the living experience and renovation effect. Many decoration enthusiasts are torn between two core questions: can a new house's walls be directly occupied by simply scraping putty? Is there a way to renovate an old wall without resorting to violence? Today, based on practical decoration experience, I will explain these two issues thoroughly. Whether it is new house decoration or old wall renovation, it can avoid detours.
First, clarify the core answer: It is absolutely not recommended to live directly in a new house as it only needs putty. Many people think that high-quality water-resistant putty looks clean, feels smooth to the touch, and meets environmental standards, so they want to skip the painting step and move in directly. In fact, this is a typical misconception. Firstly, even with the best water-resistant putty, there will still be a small amount of harmful substances such as free formaldehyde and VOCs remaining on the wall after scraping, which need to be gradually released during ventilation; Secondly, the drying stage of putty will continue to release moisture, which may not only affect human health but also easily cause the wall to regain moisture and mold, making it more difficult to handle later.
More importantly, walls that only apply putty lack protection from primer and topcoat, resulting in poor practicality. The surface structure of putty itself is relatively loose, and it is particularly prone to dust and powder. When cleaning daily, a gentle wipe will cause slag to fall off, and over time, the wall will turn yellow and dirty, making it impossible to maintain cleanliness. The correct approach is to first apply primer and then topcoat after scraping putty and polishing it flat. Primer can seal the wall, prevent moisture and alkali, and enhance the adhesion between topcoat and wall; Topcoat can enhance the wear resistance and dirt resistance of the wall, making it more durable. After completing the entire process, ventilate and move in for 1-2 months to ensure health and extend the lifespan of the wall.
Speaking of renovating old walls, there is actually no need to smash or demolish them. As long as you follow the three core steps, you can easily make the old walls look brand new, and it is convenient and durable.
The first step is grassroots treatment, which is the foundation of renovating old walls and directly determines whether the subsequent effects are long-lasting. First, carefully inspect the wall and thoroughly remove any peeling or bulging areas to prevent the new putty from detaching from the old wall in the future; For wall cracks, it is necessary to fill and level them with joint gypsum, and then apply grid cloth to enhance crack resistance; Finally, brush the interface agent once as a whole. The interface agent can penetrate into the base layer of the old wall, greatly improving the adhesion of the subsequent putty and preventing new hollowing and peeling problems.
The second step is to apply putty and polish. It is recommended to use water-resistant putty and apply it 1-2 times. The specific number of times should be adjusted according to the flatness of the wall surface. Wait until the putty is completely dry before applying the next layer to avoid weak adhesion between the two layers. After all the putty is dry, gently polish it with fine sandpaper. When polishing, pay attention to even force to make the wall surface smooth and even, without any unevenness. After polishing, it is necessary to thoroughly clean the dust on the wall, otherwise it will affect the adhesion effect of the subsequent primer and topcoat.
The third step is painting and finishing, which is the key to revitalizing the old wall. First, brush the primer once. The primer can further seal the putty layer, isolate moisture, and make the color of the topcoat more uniform; After the primer is dry, apply 2 coats of topcoat. It is recommended to choose a scrub resistant and strong covering topcoat, which can not only effectively cover the stains and yellowing marks on the old wall, but also be easily cleaned with a gentle wipe during daily cleaning. According to this process, after renovating the old wall, not only will its appearance be improved, but its durability will also be comparable to that of a new house wall, and it can be used normally for several years.
Whether it's renovating a new house or an old wall, it's important to remember that wall foundation treatment (putty+primer) is the core, and cutting corners is absolutely unacceptable. Moving into a new house without just scraping putty to save time is not guaranteed in terms of health and practicality; Old wall renovation does not require blindly smashing the wall. By focusing on the three steps of base treatment, putty construction, and painting, low-cost renovation can be achieved. If you have any questions about putty selection or construction details, such as not knowing how to choose water-resistant putty or how to adjust construction methods for different wall materials, you can make targeted adjustments according to your own wall conditions. The core principle is to do a good job in the foundation and ensure the integrity of the process, so that you can live in peace of mind in the future.
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