Check the aluminum frames you have received yourself.
The frame installation check is very important, as it helps us understand if the installed aluminum frames are correctly placed. See instructions for checking correct installation for all types of frames (casement frames, sliding frames, external roller shutters, etc.). How do I check frame installation? Were the aluminum frames installed correctly? The answer is provided below (click on the titles for more), or if you want advice before purchasing frames, read in detail.
