1. Repointing, where the joints need it. Failed mortar comes out and goes back in before anything is fastened to it. Lath is only as good as what is holding it, and a fastener set into soft mortar is doing nothing at all. This is the most common reason a stucco-over-brick quote is higher than the homeowner expected, and it is also the line item we refuse to drop.
2. The face gets cleaned. Old paint, loose material, efflorescence and anything else sitting between us and the brick comes off. Painted brick in particular gets checked carefully, because paint hides both spalling and the evidence of water.
3. Strapping goes on, level and plumb. On a furred assembly this is what creates the air gap, and it is also what lets us straighten a wall that has settled. Brick from the 1960s is rarely dead flat and the finish coat will show every wave we leave in it.
4. Lath is mechanically fastened. Fastened, not stuck. Into masonry with the right fixings at the right spacing, lapped properly at every seam. This is the skeleton the whole wall hangs on for the next four decades.
5. Openings and terminations get detailed. Head flashing over every window and door, sill detailing, a weep screed at the base of the new system, and sealant joints with backer rod where the cladding meets anything that is not cladding. More stucco fails at these junctions than in the middle of a wall, which is why we set them out before the base coat rather than tidying them after.
6. Base coat, mesh, then finish. Reinforcing mesh embedded in the base coat, then an integrally coloured finish so the colour is through the material and never needs repainting. Whole elevations at a time, ending at corners and control joints.
Season: April to November for cement work. The same timing logic applies here as anywhere else on the house — it is set out in the best time of year for stucco work in the GTA.