Portland sits in the Cascadia Subduction Zone, requiring landscape features that can withstand seismic activity. Our retaining walls, patios, and pathways are engineered for stability.
We use geogrid-reinforced soil systems for hillside terraces in West Slope neighborhoods. All masonry work incorporates flexible joints and seismic gaps that allow movement without collapse. For stone features, we prefer locally sourced basalt that's less prone to cracking than imported materials.
Even small details matter - we secure boulders with underground deadmen anchors and design fence posts with breakaway bases. All installations meet or exceed Oregon's seismic design requirements for residential landscapes.
We use geogrid-reinforced soil systems for hillside terraces in West Slope neighborhoods. All masonry work incorporates flexible joints and seismic gaps that allow movement without collapse. For stone features, we prefer locally sourced basalt that's less prone to cracking than imported materials.
Even small details matter - we secure boulders with underground deadmen anchors and design fence posts with breakaway bases. All installations meet or exceed Oregon's seismic design requirements for residential landscapes.
Our Process
- 01 Step 1: Site evaluation with slope stability assessment
- 02 Step 2: Engineering consultation for high-risk features
- 03 Step 3: Installation with seismic provisions
- 04 Step 4: Post-installation inspection report
Benefits
- Reduces landslide risk on sloped properties
- Minimizes repair costs after seismic events
- Meets insurance requirements for hillside homes
- Maintains aesthetic while prioritizing safety
Frequently Asked Questions
How does this affect project costs?
Seismic provisions typically add 10-15% to hardscaping projects but can save thousands in potential repair costs and may lower your homeowners insurance premiums.
Can existing landscaping be retrofitted?
We can assess and reinforce older retaining walls and other features, though some severely compromised structures may need complete replacement for safety.