Is it normal that the bottom of the wall is exposed after sanding?

Answering a question from an owner today, the owner sent me a picture saying that the walls of his house have just been polished, and all the walls are black and white. He asked me what happened and whether it belonged to normal situation?

After reading the picture, I replied to the owner, I said, did you use a very small amount of putty to scrape the putty?

The owner replied, saying that his house with a construction area of ​​105 square meters only used less than 10 packs of putty, and there was a lot of putty left.

In this case, it is very typical that the putty is too thin, and the wall leaks after polishing.

This situation is very abnormal. It is normal for the wall to leak after grinding. There are three or two places in the whole house that are allowed, but like this owner’s house, all the walls have such a large area of ​​leaks. No way.

To be able to do this work like this, the master of this work is either a novice, or the labor fee is not high, in order to save labor.

The scene is already like this, there is no other way, and the putty must be re-scraped.

Talk to you about how many bags of putty are needed for home decoration? It is possible that the number is not accurate, but it can be used as a reference. With this number, at least it will not be deceived by some unscrupulous masters.

Now putty is generally a bag of 20 kilograms. Under normal circumstances, a bag of putty can scrape more than 20 square meters, and one kilogram of putty can scrape more than 1 square meter. If the flatness is poor, the scraped area will be less.

For example, the building area of ​​a house is 100 square meters. According to the general formula, the area of ​​the wall and the top surface is about 250 square meters, and the quantity of putty required is at least twelve or three packs.

Of course, the more putty is used, the better. Too much putty will cause the wall to crack, and if too little is used, the wall will leak.

Finally, let me say that the wall leveling does not use putty. For leveling, you need to use plaster or glue-free gypsum. Putty can only play the role of micro leveling.