There is a house (earthen house) that needs plastering badly. How to plaster the wall is the best? What is mortar and where can I buy it? Be more specific. Oh ... thanks.

What you said is that the wall is earth and needs mortar. Remove the dust from the surface of the earth wall first, and then rinse it with clear water, so that the first step is completed. Cement mortar is a mixture of water, cement and sand in a certain proportion. Cement can be bought in the building materials market. Sand is generally divided into mountain sand and river sand. Sea sand is used in some places. You can buy it by asking at the construction site. Generally, 1:3 mortar is used for powder walls, that is, one barrel of cement is mixed with three barrels of sand. After the mortar is mixed, wet the wall with water, and then smear the cement mortar powder on the wall. After smoothing with a long strip, you can rub it with a washboard. If you know that.

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