1.1This practice covers the installation of retrofit windows in detached one- and two-family dwellings and townhouses not more than three stories above-grade in height with a separate means of egress.
1.2This practice applies to retrofit windows with an exterior flush fin installed over a pre-existing window frame into a vertical wall.
1.3This practice covers the installation process from pre-installation procedures through post-installation procedures. It does not cover the fabrication or assembly of windows whether such fabrication takes place in a factory or at the intended installation site.