Dave Sr. from SWISCO responded:
February 3, 2023
Hello, If your window is "double hung", make sure your top sash is set into the head of the main frame of the window. Another problem could be that the top sash is bowed or it "smiles". This is not an easy fix without removing the sash. I'd suggest using the 90-058 keeper shim. You will need to adapt the holes in the shim because its hole centers are at 2-1/16", whereas your keeper looks closer to 2-1/4". I would drill out the holes in the shim making them a little larger to make up for the difference. I believe this should help you lock your window. |