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Introduction
Green roof build-ups are specified to deliver biodiversity, thermal value and stormwater attenuation. The choice between extensive and intensive systems depends on depth, load and maintenance strategy.
Extensive vs intensive systems
Extensive roofs are lighter and lower maintenance, while intensive roofs deliver greater amenity and planting depth but require higher structural capacity and ongoing care.
Extensive systems suit:
- Lightweight roof structures
- Lower maintenance strategies
- Sedum or low-growth planting
- Large area coverage with limited access
Intensive systems suit:
- Accessible roof terraces
- Deeper planting and biodiversity targets
- Higher irrigation and maintenance provision
- Projects with enhanced amenity goals
Key specification checks
Confirm structural loading, drainage capacity, irrigation strategy and maintenance access. Waterproofing, root barriers and protection layers must align with manufacturer requirements.
Coordination with waterproofing
Green roof performance starts with a compliant waterproofing system. DF Roofing coordinates protection layers, inspections and QA documentation to keep warranties secure.
Final thoughts
The best green roof system balances project goals with realistic maintenance and structural capacity. Early coordination keeps the build-up compliant and the performance long-lasting.