By Chuck LeCraw, The Cornerstone Inspection Group
We like to check to see if things are on the level- or should we say “plumb”?
Is the a wall plumb or level? Here’s a quick guide to those terms.
“Plumb” refers to vertical surfaces. A foundation wall or door frame that is “plumb” is perfectly vertical. Plumb can be checked with a level tool that has a bubble floating within a vial. When the tool is placed against a plumb surface, the bubble floats in the center of the markings.
Plumb can also be checked with a plumb bob-a weight hung on the end of a string. A plumb bob will always hang perfectly vertical.
“Level” refers to horizontal surfaces. Whether a surface is level can be checked with a level tool (but of course!).
“Square” refers to the relative position of two surfaces. If they meet at a 90-degree angle, the two surfaces are square. You can check for square with a carpenter’s square tool. For larger surfaces, builders use a 3-4 triangle technique to ensure accurate 90-degree angles.
Just remember: Carpenters and other building professionals worry about level, plumb and square-or your windows and doors would not close!