Plumbing, Lining and Bracing Framed Walls
A framing contractor explains his efficient sequence for keeping walls straight and true.
Synopsis: In this article, a framing contractor explains how to get rough-framed walls plumb and straight. He discusses methods of bracing and how to string line to check a wall for straightness.
I have a painting on the wall of my office at home. The painting hangs in a room built in the 1920’s or 30’s, and the room has 2×4 floor joists and rafters. No matter how hard I try, I can’t get the picture to hang straight. My office was probably plumb and straight when it was new, but now it’s neither straight nor square nor level. A picture that doesn’t hang squarely on a wall might not bug you, but even worse things can go wrong if you build an out-of-square structure.
To avoid these problems, once you’ve built, stood and nailed walls together, they must be plumbed and lined. Plumb and line makes walls straight and true. Plumbing is setting a level against the end of a wall to make sure that it stands up straight. Lining is using a tight line attached to the top of a wall to gauge a wall’s straightness along its length. You plumb and line walls before installing joists, rafters and sheathing because it’s nearly impossible to move walls after these items are nailed in place.
Doing an inaccurate job will slow down every subsequent framing phase. If exterior walls aren’t straight, you’ll have to measure every rafter or floor joist before you cut it; otherwise, it won’t fit on the crooked wall. And if you have crooked walls, you’ll have bowed siding; you’ll have to scribe soffits. You’ll have a mess.
If you’ve framed the floor and the walls carefully, it shouldn’t take more than a few hours…