A weep hole is a tiny gap in a masonry siding that lets water drain. To enable drainage, these are positioned at the bottom of a structure.
Many window and patio door frames have it to allow the water held inside the slide beam frames to flow outside your window trim. Water will become trapped if these weep holes are shut, or it will locate a low spot and leave towards inside the building. Once frozen, the ice’s growth might cause harm to the surrounding areas, such as your windows. A wet finger will suffice in the caulk application if a putty knife is unavailable.