Lath installation in progress

What we install

  • Metal lath — 3.4 lb galvanized self-furring, attached on 7-inch vertical centers and 16-inch horizontal centers to wood-frame, steel-stud, or masonry substrates.
  • Weather barrier — two layers of Grade-D building paper, properly lapped and integrated with all window, door, and penetration flashings.
  • Accessories — galvanized weep screed, casing beads, corner aid, expanded-wing corner bead, and control / expansion joints sized to the assembly.
  • Penetration flashing — sleeves, sleeves, and more sleeves. Every pipe, vent, and fixture gets flashed and sealed before lath goes up, not after.

Why the substrate matters

Plaster fails at the substrate. Not at the finish coat. By the time a hairline crack shows up on a finished wall, the cause is usually traced back to one of five lath-stage mistakes — paper laps in the wrong direction, weep screed buried in dirt, fasteners over-driven, expansion joints missed, or a corner bead that's not square.

That's why we treat the lath inspection as the most important walkthrough of the job. If your superintendent doesn't have time to walk it with us, we'll do it twice ourselves.

A perfect finish coat can't fix a sloppy backup. Get the substrate right, and the rest of the system can do its job for the next forty years.

Substrates we work on

  • Wood-frame construction (Type V residential)
  • Light-gauge steel-stud framing (Type V and Type II commercial)
  • CMU and poured-concrete walls
  • Existing plaster — overlays, patches, and tie-ins
  • Curved walls, soffits, returns, and reveals

Code compliance, written down

Every lath assembly we install meets or exceeds CBC and ASTM C-1063 requirements. Submittals — product data sheets, fastener schedules, paper lap diagrams — delivered with the bid. If your plans-check or inspector has a specific note, send it over and we'll match it word for word.

The spec,
for the bid sheet.

Lath3.4 lb galvanized self-furring metal lath, K-Lath or equal
PaperTwo layers Grade-D 60-minute building paper, ASTM D226
FastenersGalvanized roofing nails or self-tapping screws, 7-in. O.C. vertical, 16-in. O.C. horizontal
Weep Screed26-ga. galvanized, set 4 in. above earth or 2 in. above paved surfaces (CBC §2512.1.2)
Corner BeadExpanded-wing galvanized, full-height continuous
Expansion JointsEvery 144 sq ft or 18 LF max, per ASTM C-1063
Penetration FlashingSelf-adhering flashing tape, installed before lath, lapped over WRB
InspectionPre-coat walkthrough with superintendent + Richartz foreman

"

We don't sub our lath out anymore. Richartz catches things at the substrate that our framers and ours subs miss — saves us punch and re-work every time.

— Custom Home Builder · Manhattan Beach

Lath scope coming up?

Send the plans and the
elevation count.

Request a Bid