Artificial Grass on Rooftop Terraces: Design & Installation Tips
Rooftop terraces extend living space and add value—but adding a natural lawn atop concrete or decking can be challenging. Artificial grass offers a lightweight, low-maintenance alternative that transforms rooftop areas into lush, inviting retreats. In this guide, we cover key design considerations, structural requirements, and step-by-step installation tips to ensure your rooftop oasis looks great and performs flawlessly.
Whether you’re creating a private urban garden, a communal lounge for your building, or an event space atop a commercial property, careful planning and proper installation will help you avoid leaks, drainage issues, and premature wear.
What You’ll Learn in This Guide:
- Structural load and weight considerations
- Selecting UV- and weather-resistant turf
- Essential drainage and waterproofing strategies
- Preparing a stable, protective underlayer
- Proper turf seaming and edge detailing
- Infill options for rooftop applications
- Design accents: planters, furniture, and lighting
- Long-term maintenance and safety tips
1. Assess Structural Load Capacity
Before adding turf, consult a structural engineer to verify your rooftop can support the additional weight. Artificial grass alone weighs 1–2 lbs per sq ft, but added infill, pavers, planters, and furniture can increase loads substantially. Factor in live loads (people, planters) and dead loads (base materials) to ensure safety and compliance with local building codes.
2. Choose the Right Turf Product
Rooftop use demands UV-stable, weather-resistant turf designed for high UV exposure and temperature variation. Look for:
- UV protection: Prevent color fade and fiber brittleness.
- Fire resistance: Meet rooftop fire codes and safety standards.
- Non-slip backing: Ensure safe footing when wet.
- Low-pile height: Easier cleaning and less wind uplift.
3. Plan Drainage & Waterproofing
Proper drainage is critical to avoid ponding and roof membrane damage. Integrate a waterproofing membrane beneath your ballast or underlayment. Install a pre-formed drainage mat or layer of free-draining aggregate, sloped at 1–2% to direct water to roof drains or scuppers. Ensure turf backing has sufficient perforations to allow water flow through the system.
4. Prepare the Underlayer & Base
Avoid installing turf directly on the roof membrane. Add a protective underlayment—such as shock pads, protection boards, or paver pedestals—to safeguard waterproofing and provide a level surface. A layer of sand or crushed stone atop the underlayment can further stabilize the turf and improve drainage.
5. Seam and Secure the Turf
Lay turf in the same blade direction and align seams carefully. Use premium turf tape and adhesive rated for rooftop conditions. Secure edges with perimeter glue or mechanical fasteners designed for rooftop decks. Maintain a ¼-inch spacing at seams to allow for thermal expansion.
6. Select Appropriate Infill
On rooftops, choose infill that adds fire resistance and prevents compaction. Options include:
- Silica sand: Economical and stable, but may retain heat.
- Rubber crumb: Lightweight, adds cushioning, and resists compaction.
- Plant-based infill: Eco-friendly, but may require more frequent replacement.
7. Enhance Design with Accents
Integrate planters, seating, and lighting to create inviting zones. Use raised planter beds or modular furniture to anchor the space. Install LED uplighting or string lights for ambiance. Consider privacy screens or trellises for windbreaks and shade.
8. Maintain Your Rooftop Turf
Regular maintenance extends turf life and prevents debris buildup. Sweep or blow leaves monthly, rinse with water to remove dust, and inspect drainage channels semi-annually. Replenish infill as needed and patch seams promptly.
For comprehensive care, download our maintenance guide or schedule professional upkeep with our installers.
Ready to Transform Your Rooftop?
Contact Buy-Grass for design consultations and expert rooftop turf installation.
