Vim li cas PVC dej yeeb nkab sib koom ua ke? Yog tias cov kav dej hauv chav dej siv cov kav dej PVC, koj tuaj yeem yuav cov kav dej PVC los txuas rau koj tus kheej thaum muaj dej ntws. Tsis tas li ntawd, koj tuaj yeem yuav cov ntaub ntawv tsis muaj dej los kho cov kav dej phwj tuaj, thiab tom qab ntawd siv cov tshuaj mortar waterproofing thiab cement. Cov laj thawj tseem ceeb yog dab tsi? Cov kua nplaum tsis sib xws, lossis qhov chaw tsis huv, lossis dej dhau los sai sai tom qab nws daig, vim tias cov kua nplaum kho tau maj mam nyob rau lub caij ntuj no, uas yuav ua rau cov dej ntws tawm. Yog tias lub xov tooj ruaj khov tsis zoo, koj tuaj yeem rov kov qee cov kua nplaum tom qab tshem tawm, lossis kov qee cov kua nplaum ntawm lub qhov ncauj kom pom tias nws tuaj yeem thaiv tau.
