The performance and quality of putty powder for exterior wall depends entirely on the performance and quality of various raw materials selected in putty. The raw materials used are stable in performance and good in quality. The performance and quality of products are good. There will be no major problems in production, whether manual or mechanical, as long as they are mixed evenly. To ensure the quality of putty powder for exterior wall. In terms of engineering quality assurance, Bainianda believes that the main thing is to pay attention to the treatment of grass-roots and grass-roots interfaces.

基層和基層界面的處理有以下幾個內容：

The treatment of grass-roots and grass-roots interface has the following contents:

1. 基層的穩定性。施工前要對基層進行仔細檢查和確認，檢查基層的平整度、強度、基層吸水率，基層有無粉化、疏松、返堿等現象，有無明顯裂紋、裂縫（可用往墻上澆水的方法來檢查），基層是否已經穩定。如基層達不到外墻膩子粉的施工要求，應先做相應的技術處理，如基層符合外墻膩子的施工要求，便可以進行外墻膩子粉施工。

1. Stability of grass-roots units. Before construction, we should carefully check and confirm the grass-roots, check the smoothness, strength, water absorption of the grass-roots, whether the grass-roots is pulverized, loose, alkali return and other phenomena, whether there are obvious cracks, cracks (can be checked by watering the wall), whether the grass-roots is stable. If the base can not meet the construction requirements of putty powder for external wall, corresponding technical treatment should be done first. If the base meets the construction requirements of putty powder for external wall, putty powder for external wall can be constructed.

2. 基層的強度必須大于外墻膩子的強度。按材料的粘結理論與實踐，如果墻基層的強度小于外墻膩子，外墻膩子容易出現“拔根”、空鼓、脫落現象。如基層強度大于外墻膩子粉的強度，則不會出現這些問題。

2. The strength of base must be greater than that of putty. According to the bonding theory and practice of materials, if the strength of the wall base is less than that of the external wall putty, the external wall putty is prone to "pull out", "empty drum" and "fall off". If the strength of the base is greater than that of the putty powder, these problems will not arise.

3. 對界面的嚴格處理。先清除浮灰、油污（包括脫模劑），填刮基層的裂縫，剔出鼓包，如基層有明顯不平的地方，先用抗裂砂漿找平。如基層已特別干燥、吸水性很強，環境氣候也很干燥，就會影響到外墻膩子與基層的粘附力及強度，因此，建議施工前，可用水先澆濕墻基層后，再進行外墻膩子粉的施工，如果條件許可，施工后2-3天，可噴水養護1-2次，防裂效果和強度會更好。

3. Strict treatment of interface. Firstly, remove floating ash and oil (including release agent), fill and scrape cracks in the base, and remove bulges. If there are obvious unevenness in the base, first use anti-cracking mortar to leveling. If the base is especially dry, absorbable, and the environment and climate are dry, it will affect the adhesion and strength of the putty on the outer wall and the base. Therefore, it is suggested that before construction, water can be used to pour wet the base of the wall first, then to carry out the construction of putty powder on the outer wall. If conditions permit, 2-3 days after construction, water can be sprayed to maintain 1-2 times and prevent cracking. The effect and intensity will be better.