在墻面裝修施工中，膩子粉是打造平整墻面的基礎材料，尤其是外墻膩子，不僅要保證平整度，還得抵御風吹日曬的侵蝕。但很多施工師傅和業主都遇到過頭疼的問題——外墻膩子剛批刮完就冒出密密麻麻的氣泡，不僅影響美觀，還會降低膩子附著力，后期容易出現開裂、脫落的情況。其實外墻膩子起泡不是偶然，大多和施工操作或材料配比不當有關。今天就專門科普膩子粉相關知識，重點拆解外墻膩子起泡的5個核心原因，幫大家避開施工坑。

　　In wall decoration construction, putty powder is the basic material for creating a flat wall, especially for exterior wall putty. It not only needs to ensure flatness, but also withstand the erosion of wind and sun. But many construction workers and owners have encountered a headache problem - dense bubbles appear just after the exterior wall putty is applied, which not only affects the appearance, but also reduces the adhesion of the putty, and is prone to cracking and falling off in the later stage. In fact, the foaming of exterior wall putty is not accidental, but mostly related to improper construction operations or material ratios. Today, we will specifically popularize knowledge related to putty powder, focusing on dismantling the 5 core reasons for the foaming of exterior wall putty, to help everyone avoid construction pits.

　　第一個常見原因是膩子攪拌不均勻。很多人圖省事，攪拌時敷衍了事，導致膩子粉和水沒有充分融合，內部結構雜亂無章。這樣的膩子批刮到墻面上后，隨著水分逐漸蒸發，內部不均勻的間隙會形成空氣腔，最終頂起膩子層，形成氣泡。尤其外墻施工環境復雜，攪拌不勻的膩子后續還可能因結構不穩定，加劇破損問題。

　　The first common reason is uneven mixing of putty. Many people try to save time by mixing hastily, resulting in incomplete fusion of putty powder and water, and a chaotic internal structure. After scraping such putty onto the wall, as the moisture gradually evaporates, uneven gaps inside will form air pockets, ultimately lifting the putty layer and forming bubbles. Especially in the complex construction environment of exterior walls, uneven mixing of putty may further exacerbate damage problems due to structural instability.

　　第二個原因是膩子加水量過多。不少施工人員覺得加水多的膩子更好批刮，卻忽略了水量對膩子性能的影響。加水過多會讓膩子過于濕潤，內部水分蒸發時會帶動空氣流動，而過多的水分又會阻礙空氣排出，最終形成氣泡。這里給大家一個明確的參考：一般外墻膩子的加水量建議控制在10%到20%之間，具體可根據膩子粉的產品說明微調，既保證施工流暢性，又能避免氣泡產生。

　　The second reason is that there is too much water added to the putty. Many construction workers think that putty with more water is better for scraping, but they overlook the influence of water on the performance of putty. Adding too much water will make the putty too wet, and when the internal moisture evaporates, it will drive air flow. However, excessive moisture will hinder air discharge, ultimately forming bubbles. Here is a clear reference for everyone: it is recommended to control the amount of water added to exterior wall putty between 10% and 20%. Specific adjustments can be made according to the product instructions of the putty powder to ensure smooth construction and avoid the generation of bubbles.

　　基層處理不當，也是外墻膩子起泡的重要誘因。外墻基層長期暴露在室外，容易積累灰塵、油污，或存在松散的表層。如果施工前沒有對基層進行充分的清潔和打磨，膩子就無法和基層緊密貼合，兩者之間會殘留空氣和雜質。后續隨著環境溫濕度變化，這些殘留的空氣會膨脹，導致膩子層起泡。所以外墻施工前，一定要把基層清理干凈，必要時進行打磨處理，提升膩子的附著力。

　　Improper grassroots treatment is also an important cause of foam formation in exterior wall putty. The base layer of the exterior wall is exposed to the outside for a long time, which can easily accumulate dust, oil stains, or have a loose surface. If the base layer is not thoroughly cleaned and polished before construction, the putty cannot be tightly adhered to the base layer, and air and impurities will remain between the two. Subsequently, with changes in environmental temperature and humidity, these residual air will expand, causing the putty layer to bubble. So before the construction of the exterior wall, it is necessary to clean the base layer and polish it if necessary to improve the adhesion of the putty.

　　第四個原因是單層批刮過厚。有些人為了節省工期，想一次性完成找平，把膩子批刮得很厚。但這樣做會讓膩子層內部的空氣難以順利排出，隨著水分蒸發，空氣被封在內部，就會形成氣泡。正確的做法是分批次薄批，建議批刮兩到三層，而且每層之間必須等上一層完全干燥后再進行，這樣能讓空氣充分揮發，避免氣泡和開裂問題。

　　The fourth reason is that the single-layer scraping is too thick. Some people, in order to save time, want to complete leveling in one go by scraping the putty very thick. But doing so will make it difficult for the air inside the putty layer to be discharged smoothly. As the moisture evaporates, the air is sealed inside, forming bubbles. The correct approach is to divide the batch into thin batches. It is recommended to scrape two to three layers, and wait for the previous layer to completely dry before proceeding. This can allow the air to evaporate fully and avoid problems such as bubbles and cracking.

　　最后一個容易被忽略的原因，是膩子中纖維素添加量過大。纖維素能提升膩子的柔韌性和保水性，但添加過多反而會適得其反，讓膩子內部結構變得過于松散。這樣的膩子強度不足，內部間隙多，空氣容易積聚，施工后很容易出現起泡現象。根據行業經驗，纖維素的添加量建議控制在2%到6%之間，才能保證膩子的正常性能。

　　The last easily overlooked reason is the excessive amount of cellulose added to the putty. Cellulose can improve the flexibility and water retention of putty, but adding too much can have the opposite effect, making the internal structure of putty too loose. This type of putty has insufficient strength, multiple internal gaps, and is prone to air accumulation, making it easy to produce bubbles after construction. Based on industry experience, it is recommended to control the amount of cellulose added between 2% and 6% to ensure the normal performance of putty.

　　其實外墻膩子起泡問題，大多可以通過規范操作避免。從均勻攪拌、控制加水量，到做好基層處理、分層薄批，再到合理控制材料配比，每一個環節都不能馬虎。希望通過這次科普，能讓大家更了解膩子粉的施工要點，在后續外墻裝修中避開這些常見問題，打造出平整、耐用的墻面。如果大家在膩子粉使用或砂漿施工中還有其他疑問，也可以多關注相關施工規范，或向專業人士咨詢。

　　In fact, the problem of foam formation in exterior wall putty can mostly be avoided through standardized operations. From uniform mixing and controlling the amount of water added, to well treating the base layer, layering and thinning the batch, to reasonably controlling the material ratio, every step cannot be taken lightly. I hope that through this science popularization, everyone can have a better understanding of the construction points of putty powder, avoid these common problems in subsequent exterior wall decoration, and create smooth and durable walls. If you have any other questions about the use of putty powder or mortar construction, you can also pay more attention to relevant construction specifications or consult professionals.

　　本文由 濟南膩子粉   友情奉獻.更多有關的知識請點擊  http://www.sjzmx.cn/   真誠的態度.為您提供為全面的服務.更多有關的知識我們將會陸續向大家奉獻.敬請期待.

　　This article is a friendly contribution from Jinan Putty Powder For more related knowledge, please click http://www.sjzmx.cn/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.