Dos

• Always use the roof waterproofing material after getting approval from the expert.
• Always apply the layer of bitumen and kerosene oil before starting the roof waterproofing process.
• Use 10 Kg bitumen for 100 square feet area only.
• Use hot bitumen instead of cold bitumen.
• Apply 3 inches of soil layer after adding the polythene sheet.
• Use tiles on the soil layer instead of bricks.

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Don’ts

• Never use local or unapproved methods for roof waterproofing.
• Never use cold bitumen for roof waterproofing.
• Never apply tiles on the soil layer without compacting it.
• Never keep the foundation of parapet walls more than 4.5 inches.