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Whether you're remodeling your home or performing client work in their space, there may come a time when you need to place something on one side of a wall, yet must feed or cut it from the other side of the wall. (Think of wiring that you'd like to precisely line up with an electronic component, or vents for an appliance.) You can try measuring one side of the wall, then walking around to mark the measurement on the other side, but that can be problematic when going from inside to outside, or if there is a level change that alters your reference point (i.e. a room on one side, a staircase on the other).
Here an experienced carpenter shows you the trick he learned from his mentor to transfer a measurement from one side of a wall to the other quickly and flawlessly:
I’m a lapsed industrial designer. I was born in NYC and figured I’d die there, but a few years ago I abandoned New York to live on a farm in the countryside with my wife. We have six dogs.
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Pro Tip: How to Easily Transfer a Measurement from Inside a Wall to the Outside
Now show us how to ram that wire through stucco.
Could use a wire coat hanger. I always have some of these around, cuz they’re just so darn useful. :)
Drilling a hole thru a wall doesn't qualify as a "trick" to locate a point on two sides of a wall. Maybe the home-made wire drill bit, rather than buying long drill bit, is a trick, except almost no one would happen to have the necessary type of wire, so if you have to order something, why not just order long drill bits?