Flex Screen Question

A quick learner from BRUNSWICK says:
Should the measurements for a Flex Screen for a double hung window be done from inside or outside the house? Thank you.
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Paul from SWISCO responded:
Hello! If this window is on the ground floor and you have clear access to it, then measuring it from the outside would probably be easier. At the end of the day it comes down to ease of access and, of course, personal preference.
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