Noggings

Noggings are short horizontal timber members fixed between vertical studs in a wall frame. They serve three jobs: lateral restraint of the studs against buckling, fixing for the long edges of sheet linings (plasterboard, fibre cement) where sheet joins land between studs, and blocking for fixtures that need solid backing (handrails, grab rails, kitchen cabinetry, TV mounts).

Where they sit in a wall frame

In a typical residential stud wall, noggings run perpendicular to studs at the heights determined by AS 1684 (residential timber-framed construction) and the stud height. Spacing depends on stud height, wind classification, and what’s being fixed.

Inline vs staggered fixing

Two common ways to install a row of noggings:

• Inline: every nogging on the same horizontal line. Quick to set out (one chalk line, square cuts) but the fixing is mixed: one end gets nailed straight through the stud face into the nogging’s end grain, and the other end has to be skew-nailed in at an angle through the side of the nogging because the adjacent stud face is already occupied by the previous bay’s nog. End-grain nailing is structurally weaker than face nailing, the skew end is fiddly, and inline rows are more prone to rogue nails breaking through the stud face on the back side.
• Staggered: noggings alternate either side of the chalk line, so each stud bay’s nogging sits a few centimetres above or below its neighbour. Both ends of every nog can be face-nailed straight through the stud, no skew nailing, no end-grain reliance. Each stud face also has solid timber to nail into at the joint when sheet ends or fixtures land at the nogging line. Slightly more setting-out work for cleaner, stronger fixing.

Staggered is the default for sheet-edge backing where a butt-joint lands between studs and for any wall with high fixing demand. Inline is acceptable for general lateral restraint where there’s no specific fixing requirement at the line, accepting the weaker connection.

Common naming

The terms noggings (Australian and British), dwangs (NZ), and blocking (American) all describe the same horizontal members. Australian builders use noggings or “noggs” interchangeably. Some Australian timber-framing manufacturers will spec the term rows of nogs for the purpose of plasterboard fixing.

Why they matter on site

Skipping noggings (or running them at the wrong height) shows up later as wavy lining at sheet joins, soft spots where you tried to fix a heavy fitting, or unexpected stud movement under wind load on tall walls. Adding them after lining is fitted is much harder than getting them right during framing.

Also known as: Nogs, dwangs (NZ), blocking (US).

Category: Structural.