Homeowner's yard sloped toward the house, so the landscaper hauled in 12 yards of fill, built up the bed against the back wall about 8 inches so it's level with the rest, sodded it, and set a spray zone to hit the beds.

They missed three critical code/performance items that will rot your wall and slab:

1. No Weep Screed Clearance (IRC R703.7.2.1 / IBC 2512.1.2): Stucco requires a minimum 4" clearance from grade to the bottom of the weep screed. You have 0". Water wicks up the stucco, rots the framing, and dissolves the slab edge.
2. No Drainage Plane/Flashings at Wall Base: Fill against the wall bridges the weather-resistive barrier (WRB). You need a termination bar with drip flashing above the new grade, sealing the WRB to the foundation, before backfilling.
3. Irrigation Spraying the Wall (IRC P2904 / Manufacturer Specs): Spray heads hitting stucco saturate the assembly. Code requires irrigation to not discharge on exterior walls. Convert to drip/bubblers or move heads min. 24" away.

Fix (requires excavating the bed):

1. Dig out 12–18" wide along wall, down to slab.
2. Clean wall, apply fluid-applied waterproofing (e.g., RedGard, Hydro Ban) on concrete stem wall up 12".
3. Install stainless termination bar with drip edge at min. 4" above final grade. Seal top edge to WRB/stucco.
4. Backfill with gravel (not soil) to within 4" of weep screed. Top 4" = soil/sod.
5. Install French drain at bottom of gravel trench, daylighting or to sump.
6. Cap spray heads; run drip line for plants.

Do not just "dig a trench" or add gutters. The wall-to-grade detail is wrong. Hire a stucco/waterproofing specialist, not the landscaper.

They missed proper drainage and waterproofing protection for the stucco wall and slab foundation.

By building up the soil bed 8 inches against the back wall and sodding it, they created a retained soil condition directly against the stucco-clad foundation wall. This violates key building and moisture management principles:

1. No clearance from stucco to grade: Stucco (especially traditional cement-based) requires a minimum 6-inch clearance from finished grade to the bottom of the stucco wall per IRC R703.7 and ASTM C926. Burying stucco below grade or against soil invites wicking moisture, leading to efflorescence, spalling, mold, and eventual deterioration of the stucco and underlying sheathing/framing.

1. No drainage plane or waterproofing: Even if clearance were met, soil against a foundation wall needs a drainage layer (e.g., gravel, drainage mat) and waterproofing or dampproofing on the wall (IRC R406). Stucco is not a waterproof barrier — it’s absorbent. Without a waterproof membrane (like fluid-applied or sheet membrane) behind the stucco at grade, hydrostatic pressure and capillary action will drive water into the wall assembly.

1. Sod and irrigation worsen the problem: The spray zone hitting the bed ensures constant moisture saturation against the wall — accelerating decay. Irrigation should never spray directly onto stucco walls or foundations.

What they should have done:

• Limited fill to no more than 4–6 inches against the wall, maintaining 6+ inches of clearance.
• Installed a drainage mat (e.g., Delta-MS) against the wall, tied into a perimeter drain.
• Applied a waterproofing coating to the stucco wall below grade (if any exposure exists).
• Directed irrigation away from the wall — use drip or low-angle heads, not spray zones hitting the structure.

Bottom line: This setup risks long-term moisture damage to the stucco and slab edge. A licensed contractor or waterproofing specialist should assess and correct it — this is not a DIY fix for a homeowner unfamiliar with building envelope details. (IRC R406, R703.7; ASTM C926)