As Dirt/dust stuck in paint, surface needs to be thoroughly brushed.
It is significant to provide suitable grating in roof opening for rainwater pipes for proper drainage.
Proper packing around grill anchorage is a must for its strength & longevity.
Maintain a gap in between vertical gardens & building walls to avoid potential chances of moisture intrusion/ seepage.
Maintaining a gap between the facade & pipeline is significant to avoid seepage/moisture related problem due to any leakage.
External sill should be at lower level than window frame to avoid water stagnancy.
Thickness of wall putty should be nominal