Yes. The trained surveyors at Fenesta are well aware that even a minute difference between two apertures requires addressal. The team of surveyors will visit the site of installation and measure each and every opening before they send the windows for manufacture. Each Fenesta window is custom made in our state-of-the-art factories and no changes can be made once it has been produced. So, to ensure a perfect fit, the team will carefully measure all the apertures at your site.