Yes, of coarse builders use our Quick Door Hanger brackets on windows. Install a window with the Quick Door Hanger bracket. The installation brackets work great on window jambs. Using these brackets will give a strong, professional window installation without leaving any nail holes to patch in the window jamb. It will also result in a perfect reveal when it's time to case the window. If no drywall is yet installed on the inside of the building simply offset the brackets the thickness of the future drywall.