Need install advice Singlehung window
We are in the process of replacing a large single hung window. It is flush to the stucko outside. There is no mention of how to seal this window (PGT) I know that when patio doors were installed they used 2 rows of caulk at the bottom but what do you do with single hung windows. Right now we are set even with stuco but I can stick my fingers in between the bottom edge of window and stuco. What do you fill this large void with? It seems to be floating within the opening. We have it temporarily tacked now. Please tell me what we are doing wrong or right?