1. The Defendant: KRW 33,759,550 for the Plaintiff and KRW 5% per annum from June 17, 2017 to February 8, 2018; and

1. Facts of recognition;

A. On June 14, 2016, the Plaintiff was supplied by the Defendant with stone and stone in total in KRW 17,689,392.

However, at that time, the Plaintiff returned to the Defendant some of the stones, such as the fluorite, etc.

B. The Plaintiff was awarded a contract from C and D for the construction of a new building on the ground of land E located in Jung-Eup (hereinafter “instant building”). The Plaintiff used the building supplied by the Defendant as the outer wall and interior passage of the said building, and the finishing materials of the stairs floor, etc.

The above corporation was completed at the end of June 2016.

C. After the completion of the building in this case, there were red phenomena such as steel powder, outer walls, floors, etc. from the building stones supplied by the Defendant. In order to remove them around August 2016, the Defendant, who was unaware of drugs on the stone, but the said phenomenon occurred again, and rather, the drug contained corrosion on the steel parts of the instant building.

The sum of the expenses incurred in removing stones, such as outer walls, floors, etc., of the instant building and replacing them with other stones is KRW 67,519,100, and the Defendant removed and reconstructed steel parts as a result of the medicine treatment in the instant building around August 2016, the expenses incurred in reconstruction are KRW 3,901,700.

[Reasons for Recognition] Gap evidence Nos. 2 (including paper numbers), Eul evidence Nos. 1 and 2, and the result of a request for appraisal to F of a technical office

2. Determination

A. In full view of the facts acknowledged as above 1 and the purport of the entire arguments as to the liability for damages caused by building defects, the building stones supplied by the Defendant to the Plaintiff ought to have such quality as to be used in building outer walls, floors, etc. under a contract between the Plaintiff and the Defendant, or under the good faith principle, the building stones supplied by the Defendant under a contract between the Plaintiff and the Defendant, as it appears that the building stones would be used in building outer

However, the degree and scope of red parts generated from the instant building, and drugs.