Portland's hilly neighborhoods combined with seismic activity create unique challenges for retaining walls. Our engineered systems use geogrid reinforcement and segmented concrete blocks designed to flex during tremors without catastrophic failure.
We analyze soil types specific to Portland - the clay-heavy soils in Sylvan Heights behave differently than sandy soils in St. Johns. All designs include weep holes sized for our rainfall patterns and expansion joints every 12 feet to accommodate ground movement.
For historic districts like Ladd's Addition, we offer traditional stone walls rebuilt with modern seismic backing that preserves the vintage aesthetic while meeting current safety standards. Every project includes a post-installation inspection after the first major winter to address any settling.
We analyze soil types specific to Portland - the clay-heavy soils in Sylvan Heights behave differently than sandy soils in St. Johns. All designs include weep holes sized for our rainfall patterns and expansion joints every 12 feet to accommodate ground movement.
For historic districts like Ladd's Addition, we offer traditional stone walls rebuilt with modern seismic backing that preserves the vintage aesthetic while meeting current safety standards. Every project includes a post-installation inspection after the first major winter to address any settling.
Our Process
- 01 Step 1: Geotechnical assessment of soil composition and slope grade
- 02 Step 2: Engineering plans certified for seismic zone 4B requirements
- 03 Step 3: Installation with gravel backfill and geogrid layers
- 04 Step 4: Final inspection after first wet season
Benefits
- Reduces landslide risk on sloped properties
- Designed to withstand 6.0+ quakes
- Prevents water buildup behind walls
- Preserves property value
Frequently Asked Questions
How do these compare to standard retaining walls?
Our walls cost 15-20% more initially but save money long-term by avoiding quake damage repairs. They're also eligible for Portland's seismic retrofit tax credits.
Can you match my Craftsman home's style?
Yes, we source vintage-style concrete blocks and can do tuck-pointed mortar that complements early 20th century architecture.