I need to replace my threshold for my exterior french doors. Both sides open up (although one side is always stationary unless you unlock it. How do I remove the old threshold in order to replace with new one? How do you cut the new threshold if it's too long?

Use a hack saw to cut thresholds.

Remove old screws in existing threshold and remove. Its its stubborn hack saw in middle of old and ifts still stubborn hacksaw it one more time take out middle and then sides of old.
Cut new threashold tp fit, caulk under it screw down.

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