1, Mma mara mma

Ntugharị pụrụ iche, kristal na-egbuke egbuke, agba bara ụba na nke doro anya

2, mgbochi ebu

Mgbochi mildew na-adịte aka. Enwere ike ịsacha ma sachaa grout tile, na-ebelata ohere nke nje bacteria na-amụba na oghere tile.

3, Kemịkalụ kwụsiri ike

Na-eguzogide acid na alkali, ịchafụ, ọnya na mmanụ

4, Mechanically kwụsiri ike

Enweghị mbelata, enweghị mgbawa, enweghị chalking

5, Nnukwu viscosity

Ike njikọta siri ike na taịlị

6, gburugburu gburugburu

Enweghị VOC na metal dị arọ, enweghị mmerụ ahụ na gburugburu mmadụ