Frame an Exterior Wall From Plates to Stand-Up

The Problem

An exterior wall is a dozen decisions made in the right order — plate lengths, stud length, layout, crown direction, squaring, bracing — and a mistake in an early one (layout pulled from the wrong side, plates flipped end-for-end) is invisible until the sheathing or the second floor won't land right.

The Technique

1. Cut the plates. One bottom plate and two top plates, cut to the full exterior length of the wall. Lay the bottom and first top plate out around the house so every wall is staged before assembly starts.
2. Pull layout — always from the outside of the house. Mark the first stud at 1-1/2", then mark at every red 16-inch highlight on the tape, 3/4" each side of it — a stud-width box centered on the 16-inch grid.
3. Cut studs to total wall height minus 3-3/8" (the three plates' combined thickness). Lumber yards sell pre-cuts: 92-5/8" studs for an 8-foot ceiling, 104-5/8" for a 9-foot.
4. Separate the plates without turning them — flip or spin one and the layout marks no longer face each other.
5. Crown the studs. Sight down each stud's narrow edge for the slight bow, mark the crown direction, and build with every crown facing the same way.
6. Nail through the plates into each stud end — three nails per end in a 2x6 wall, at least two in a 2x4 wall.
7. Break plates over a stud. Anywhere a plate run needs more than one board, the joint lands directly on top of a stud.
8. Square by the diagonals — measure corner to corner both ways and rack until the numbers match — then lock it flat: either nail on diagonal bracing across the studs, or install the sheathing now, running it down past the bottom plate to the bottom of the mud sill.
9. Build the corners. Where two walls meet, add the L-shaped corner assembly: it gives the neighboring wall something to tie into and leaves the corner cavity open for insulation from inside.
10. Stand it up. Working alone, toenail the bottom plate to the subfloor first (or strap it) so the wall can't skate off the deck as it rises. Plumb it, then nail the bottom plate off with two nails at each stud location.