Evidence-led knowledge base
Compare pergola systems
Compare broad system characteristics before requesting project-specific evidence.
| System | Sky openness | Rain management | Verify |
|---|---|---|---|
| Open-rafter | High | Rain passes through | Structure, shade geometry, permit classification |
| Adjustable louver | Variable | Closed blades direct water to integrated drainage | Tested configuration, loads, drainage, motor and sensors |
| Fixed roof | Low | Continuous roof and organized drainage | Roof loads, weathering, overflow and legal classification |
| Retractable canopy | Variable | System-specific | Fabric rating, wind/snow operation, tension and drainage |