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Concrete roof waterproofing methods.
The concrete surface substrate shall be clean and free from contamination such as dust oil grease organic growth and release agents etc.
12 waterproofing of reinforced concrete flat roof 12 1 background most roofs in singapore are constructed using reinforced concrete which is known to have pores or capillary tracts.
Pour your chosen vapor barrier into a paint sprayer after the primer is dry and liberally spray an even coat onto the concrete roof.
The sealer is impermeable provided it is applied correctly and forms a waterproof membrane around the concrete preventing moisture from entering the concrete.
Depending on the designed strength density and installation techniques the number of pores can vary.
The surface shall be free from standing water.
When waterproofing concrete a topical sealer is applied to the surface of the concrete.
Surface substrate preparation is the most important for roof waterproofing system before application.
Work systematically from one end to the other spraying in lines.
Surface preparation for waterproofing system.
These pores are interconnected within the concrete.
Allow the vapor barrier to dry before you add a second coat.
Overlap the previous line every time you start a new one.