Stucco-to-Grade Clearance: Preventing Rot & Termites in a 30-Year Condo Complex

Your Missouri condo complex (stucco on clay soil) has soil and mulch built up against the stucco. Raised beds touch the walls. You're concerned about wood rot and termites. What's the right fix?

Code Baseline: 6" Minimum Clearance

Almost every building code requires exterior finishes (stucco, wood, siding) to sit ≥6" above finished grade. Decades of mulch top-dressing have likely buried that clearance.

Option A: Re-Grade (The Real Fix)

1. Remove plants/beds against the wall.
2. Excavate to expose 6"+ of foundation below stucco.
3. Slope grade 3–4° away from building.
4. Replant with root balls at new, lower grade.

Time-consuming, but addresses the cause.

Option B: Below-Grade Moisture Barrier (The "Quick Fix")

1. Dig 12" below stucco base (to footing).
2. Pressure-wash foundation & stucco clean.
3. Repair damage; have termite pro inspect/treat.
4. Apply 2 coats of asphaltic waterproofing tar (¼" each) with 30# roofing felt between coats.
5. Backfill carefully—don't puncture the membrane.

This treats the symptom. Soil will eventually rebuild. You'll need a termite bond.

Raised Beds Against Stucco? Bad Idea.

They trap moisture, bridge the clearance, and invite termites. Remove or isolate with a 12" air gap and independent drainage.

Start with Option A wherever possible. It's the only permanent solution.