Snapping Out a Floor and Framing Walls the Right Way
(This is the third in a 10 part series. Credit: Akribis Leather. Luke Riemer, owner, was the framing contractor we hired for our build. The project consisted of a carriage house, garage extension with suite above, and renovation/expansion of the existing residence. All 3 phases of the project had some timber framing elements. Text below is a cleaned up transcript of the video above)
When it comes time to frame, everything starts with layout. If the floor isn’t square and your dimensions aren’t dead-on, those mistakes will follow you all the way through trusses, roofing, and finishes. This is where precision matters most—and where I refuse to cut corners.
Getting the Floor Perfectly Square
Before framing begins, the first job is snapping out the floor and making sure everything is square and true. I’m obsessive about this step, and for good reason. We’re investing the time now so that when trusses show up later, everything fits exactly as it should.
I rely heavily on a five-beam laser for layout. It shoots beams out both sides, forward, up, and down, all at perfect 90-degree angles. That makes it incredibly easy to establish true corners and consistent reference lines.
I set the laser at what is theoretically the inside corner of the framing. From there, I use 2×6 blocks with layout lines marked 5-15/16 inches from the outside edge. That dimension represents the full wall thickness: 5-1/2 inches for the 2×6 framing plus 7/16-inch sheathing.
I place reference blocks at each corner and adjust them slightly to “split the difference” as needed. Sometimes that means nudging a corner a sixteenth of an inch one way or another. The goal is to square the entire footprint, not obsess over a single point.
By the time everything is dialed in, the foundation ends up within plus or minus a sixteenth for square—which is excellent. As we build, we keep correcting and fine-tuning so that when trusses go on, they sit perfectly.
Snapping Exterior Wall Dimensions
Once the building is square, I snap out all exterior dimensions. For example, if two exterior walls are 14 feet outside-to-outside, I’ll work backward to establish the inside dimensions accurately.
With a 2×6 wall, the total wall thickness is 5-15/16 inches. Multiply that by two walls and you get 11-7/8 inches. One person holds the tape over that amount, and I mark 14 feet from there. That gives me the inside-to-inside wall dimension.
The key here is simple: do the math once, do it right, and use the same measurement everywhere.
A Quick Tip on Wedge Anchors
When installing wedge anchors, always put the washer and nut on before pounding the anchor into the concrete. If you mushroom the threads without the nut installed, you’re stuck. With the nut on, any damage doesn’t matter—you can still tighten everything down cleanly.
Laying Out Windows, Beams, and Posts
Once layout is complete, it’s time to start framing ceiling walls. The first step is locating windows, beam pockets, posts, and any other structural elements.
I always write the rough opening directly on the plates so there’s no confusion later. In this case, a window is located three feet in from the outside of the sheathing. I subtract 7/16 inch for the sheathing, find center, and then lay out the cripple studs accordingly.
Some areas are left open temporarily when beam heights haven’t been finalized. I’ll mark a temporary stud location and fill in the rest once the beam layout is confirmed.
Cap plate overhangs are also carefully planned. I leave myself a bit of wiggle room so intersecting walls tie together cleanly without forcing anything.
Stud Layout and Cripple Rules
Studs are laid out two feet on center, marking centerlines minus 3/4 inch so everything lines up properly.
A good rule of thumb for cripple studs under a header is this: however many studs you remove to create the opening, that’s generally how many cripples you’ll need below the header. For smaller window openings, one cripple on each side usually does the job.
Framing on a Slab
Because this building is framed on a slab, interior walls are handled differently. I don’t mark cap plates for interior walls, but I do square up layout lines on the slab so exterior corners tie together correctly.
These layout lines represent where cap plates will land and ensure everything locks together solidly.
Assembling and Squaring the Walls
Before assembling the full wall, I nail in all window framing and backing. It’s easier, faster, and cleaner to do this before the studs go together.
I also make sure nails are clearly visible—especially in headers and multi-ply members—so inspections go smoothly.
Once the wall is assembled, I square it by measuring diagonally from corner to corner. When both measurements match, the wall is square. Then I tack the top plate and lock everything in.
Perfect is the goal.
Sheathing and Standing Walls
I run sheathing continuously through the walls, which adds strength, but it also means notching around cap plates where intersecting walls tie in. Forgetting this step leads to unnecessary frustration later.
When nailing off sheathing, I follow a simple rule:
- Perimeter first
- Window and door openings
- Field nailing last
Once the wall is fully nailed, it’s ready to stand. Pull the temporary nails—and up it goes.
Wrapping Up
With layout complete and walls standing, everything is straight, square, and ready for the next phase. Taking the time to do this right at the beginning pays off at every step that follows.
Precision now means fewer problems later—and that’s how you build efficiently and professionally.
