{"id":33780,"date":"2016-12-17T12:00:36","date_gmt":"2016-12-17T08:30:36","guid":{"rendered":"https:\/\/nsgco.ir\/training-in-waterproofing-rooftops-with-cement-surfacing\/"},"modified":"2026-08-02T17:52:15","modified_gmt":"2026-08-02T14:22:15","slug":"training-in-waterproofing-rooftops-with-cement-surfacing","status":"publish","type":"post","link":"https:\/\/nsgco.co\/en\/training-in-waterproofing-rooftops-with-cement-surfacing\/","title":{"rendered":"Training in Waterproofing Rooftops with Cement Surfacing"},"content":{"rendered":"
The first stage:<\/p>\n
thoroughly clean the work surface by removing all dust, grease, petroleum substances, and any other materials that might prevent adhesion and penetration of products. Using a chisel, iron chisel, or grinding stone, carefully scrape and remove all weak or unstable areas of the surface.<\/p>\n
The second stage:<\/p>\n
In cases where deep cracks are extensive on the work surface, we first create a repair mortar using N50 additive and concrete adhesive<\/strong><\/a> (one unit of N50 adhesive and additive + five units of water + cement and SI30 silica<\/strong><\/span><\/a> or sieved stone powder). We apply this mortar onto the cracks to fill all existing pores and voids. Then we allow sufficient time for the repair mortar to completely dry. (The drying time varies depending on environmental conditions and ambient temperature.)<\/p>\n The third step:<\/p>\n