Clear Opening
These measurements are usually just the window or door measurements only. Once given to Alutech, we will add rail width to each side and two inches to height for end slat hang down and for the required box size.
Finished Overall
This measurement is the overall shutter size, from bottom of rail to top of box and outside edge of each guide rail.
Clear Opening + 1” Edge Dist.
These measurements are usually just the window or door measurements plus 1″ .
