Measuring an existing window from the inside for a replacement

Glazing
Windows
Remodeling

On a replacement survey you get one visit, and a width taken to the wrong face of the frame turns into a unit that will not go in the hole. The T1 Tomahawk hooks into the frame and reads at the tool, so a deep stone sill and a return you cannot get behind stop mattering. Every figure lands in a saved list as it is taken, so the schedule that goes to the supplier is the one measured at the opening.

How the survey gets taken

Read the T1 at the tool, not the far end
Deep sills and returns stop mattering
One visit, so the number has to be right
The T1 Tomahawk saves each figure
Schedule comes off the opening, not memory

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An existing window is measured from inside an upper floor, a brick building visible across the street. The tape is run along the head, then down the jamb, with the tool resting on a deep painted stone sill. A conventional tape and a pencil sit on the sill alongside and are not picked up.