Below is given a Safe work method statement for the installation of foundation waterproofing that can be applicable for safe working for any building or project construction.
Ensure Material for water proofing material is approved prior to application. Ensure surface preparation is approved prior to start procedure for waterproofing application.
Ensure that chamfer at foundations ,columns, walls is provided to avoid sharp/broken edges.
Surface Preparation
Surfaces to be coated must be sound, clean and free of oil or grease ,any oil or grease contamination should be removed with a proprietary chemical degreaser.
Nail heads and other protrusions that are likely to damage the coating must remove or ground Structurally unsound and friable concrete must be removed and repaired. Honey combed or spalled concrete, surface irregularities, blow holes to be repaired with a suitable POLYCRETE concrete repair mortar.
Primer Coat Application
Polycoat RBE 15 may be applied by brush, broom or squeegee.
It is highly recommended to apply priming coat to the application of Polycoat RBE 15 with 20 % water and applying this diluted coat as the primer. Polycoat RBE 15 is normally applied in two coats. After application of first coat, apply the second coat at right angles to the first coat and only after the coat has dried completely.
On vertical areas, apply the coating in multiple layers to avoid sagging of the heavy bodied coating.
Subsequent coat shall be applied only after the previous coat dries off completely and shall be applied at right angle to the previous coat.
On Horizontal surfaces , apply coating in multiple layer .Use 1000 gauge polythene sheet for protecting the applied coated areas where the backfill material is not very coarse.
It is recommended to protect the applied coating from getting damaged during backfilling by protecting the area with Polyethylene sheets.
After completion of work for each required layer ,RFIA to be raised for every layer and ensure its approval.