How should the window be measured: is it the size of the opening (external size) or gross of the internal frame (larger size)?
The measurements of the windows are calculated as specified in the art. 103 of the E.R., yes
that is, it considers the opening part of the window, gross of the frame.
FAQ SUE n. 73 - Published on 6 March 2020
Subjects:
Updated: 23/03/2020