We build rooftop ecosystems, one smart tray at a time.
A semi-intensive modular green roof tray system from China for distributors, contractors, project buyers, and selected international retail inquiries.
HT-5020 is a semi-intensive modular green roof tray system designed for rooftops that require more depth, stronger support, and smarter water management. The system consists of three key components—Verdaxa™ tray, HydroGuard™ filter, and U-Link™ connector—forming an interlocking platform that improves drainage continuity and water retention across the roof. With a 200mm tray depth and multi-directional channels, HT-5020 helps build stable, long-lasting rooftop landscapes for commercial, hospitality, and public building projects.
200mm depth for semi-intensive rooftop gardens (lawn, flowers, low shrubs)
Interlocking tray system for stable assembly and reliable performance
Optimized drainage + water retention to support healthier vegetation
Modular coverage: 0.25 m² per module (4 modules / m²)
UV-stabilized HDPP for long-term outdoor durability
HT-5020 is developed and manufactured by HOENSOEY as a China-based manufacturer specializing in modular green roof tray systems for international markets.
A Fully Integrated Modular Platform
HT-5020 is engineered as a complete semi-intensive green roof tray system—not just a planting container. Each module is part of an integrated platform designed to deliver structural stability, controlled drainage, and long-term rooftop performance.
The system combines three purpose-built components that work together to form a unified modular green roof solution.
Verdaxa™ Structural Tray
The Verdaxa™ tray forms the structural foundation of the system.
With a 200mm depth and reinforced base geometry, it distributes load evenly while supporting semi-intensive planting conditions.
Integrated multi-directional drainage channels allow controlled water movement beneath the substrate layer, reducing pressure build-up and improving drainage continuity across connected trays.
Constructed from UV-stabilized HDPP, the tray is designed for long-term outdoor exposure and rooftop durability.
HydroGuard™ Filter Layer
The HydroGuard™ filter layer prevents substrate migration into the drainage cavity while maintaining capillary water transfer.
This balance between filtration and moisture availability helps ensure consistent root hydration without compromising drainage efficiency.
By maintaining separation between soil and structural drainage channels, the system supports both plant health and functional longevity.
U-Link™ Interlocking Connector
U-Link™ connectors secure trays together to create a stable modular grid across the rooftop surface.
This interlocking system improves alignment, load distribution, and slope adaptability—particularly important in larger commercial rooftop garden installations.
By maintaining structural continuity between modules, U-Link™ enhances overall system performance under varying environmental conditions.
HT-5020 is built around three integrated components: the Verdaxa structural core tray, the HydroGuard raised filter plate, and the U-Link snap-fit drainage connector. Together, they simplify installation, support controlled water flow, and reduce the need for extra on-site assembly steps.
“…Why Semi-Intensive Systems Require Structural Drainage…”
As planting depth increases, system demands grow exponentially. A 200mm semi-intensive green roof tray holds more substrate, retains more water, and carries greater structural load compared to shallow extensive systems.
Without engineered drainage and load distribution, deeper rooftop installations may experience: Uneven settlement | Water accumulation and root saturation | Concentrated load pressure | Reduced long-term roof performance
Semi-intensive rooftop gardens therefore require more than basic trays—they require structural drainage continuity and modular stability. HT-5020 addresses these demands through reinforced tray geometry, interlocking module alignment, and multi-directional drainage channels designed specifically for deeper rooftop landscapes.
How HT-5020 Solves These Structural Challenges
HT-5020 was engineered specifically for the structural and hydraulic demands of semi-intensive rooftop systems.
Instead of relying on simple container-based trays, it integrates depth, load distribution, and drainage continuity into one cohesive modular platform.
1. Reinforced 200mm Structural Depth
The 200mm tray profile provides sufficient substrate volume while maintaining structural integrity under increased load conditions.
The reinforced base geometry distributes weight evenly across connected modules, minimizing localized stress on the roof membrane.
2. Multi-Directional Structural Drainage
Integrated drainage channels beneath the planting layer allow controlled water movement in multiple directions.
This prevents water stagnation while maintaining adequate moisture retention for plant roots.
Unlike shallow systems, HT-5020 maintains drainage continuity even across large rooftop areas.
3. Interlocking Modular Stability
The U-Link™ connector system aligns and secures trays into a unified modular grid.
This improves system stability on flat and slightly sloped roofs while ensuring consistent load transfer across the installation surface.
The result is a structurally stable, hydraulically balanced green roof tray system designed for long-term rooftop performance.
Performance Beyond the Tray
HT-5020 is more than a structural green roof tray system—it is a performance-driven rooftop garden platform designed to deliver measurable environmental and building-level benefits.
By combining 200mm planting depth, controlled drainage, and modular alignment, the system enhances both landscape functionality and long-term roof performance.
Stormwater Management
The semi-intensive tray depth increases substrate volume and water retention capacity, allowing the system to slow runoff and support controlled drainage across rooftop installations.
This contributes to improved stormwater management performance, particularly in dense urban environments where runoff control is critical.
Heat Island Reduction
Deeper vegetation coverage increases evapotranspiration and surface shading, helping reduce rooftop temperatures.
By supporting lawn areas, flowering beds, and low shrubs, HT-5020 enhances green mass compared to shallow systems, contributing to urban heat island mitigation and improved building energy efficiency.
Roof Protection & Longevity
The modular tray platform distributes load evenly and reduces direct stress on the waterproof membrane.
Controlled drainage prevents prolonged water accumulation, supporting long-term roof durability and minimizing maintenance risks.
Sustainable Urban Greening
Designed for commercial rooftop gardens, hotel terraces, and public buildings, HT-5020 enables scalable, modular rooftop greening solutions that align with sustainable building strategies and climate-resilient design principles.
Applications & Design Flexibility
With its 200mm semi-intensive profile, HT-5020 expands rooftop design possibilities beyond shallow extensive systems.
The modular green roof tray platform supports more diverse planting schemes while maintaining installation efficiency and structural reliability.
Commercial Rooftop Gardens
HT-5020 is ideal for commercial buildings where visual impact and functional performance must coexist.
Office complexes, shopping centers, and mixed-use developments can integrate semi-intensive rooftop landscapes that combine lawn areas, planting beds, and structured greenery within a modular tray system.
Hotel & Hospitality Terraces
In hospitality projects, rooftop gardens serve as experiential spaces.
The deeper tray system supports richer vegetation compared to shallow systems, creating more immersive rooftop garden environments suitable for guest areas and outdoor lounges.
Public Buildings & Institutional Projects
For schools, civic centers, and public infrastructure, HT-5020 offers a scalable modular green roof solution capable of supporting semi-intensive planting while meeting long-term durability expectations.
Adaptability to Flat and Slightly Sloped Roofs
The interlocking modular design maintains alignment and drainage continuity across flat surfaces and mildly sloped roof conditions, ensuring consistent system performance across varying architectural layouts.
Expanded Planting Possibilities
With a 200mm tray depth, the system supports: Lawn and turf areas, Flowering perennials, Groundcovers and Low shrubs
This flexibility enables designers to move beyond simple sedum coverage and create layered rooftop garden compositions with greater ecological and visual diversity.
HT-5020 is suitable for urban roofs, podium landscapes, public buildings, hospitality projects, and premium rooftop gardens where both planting performance and drainage reliability matter.
Technical Specifications
Below are the core technical parameters of the HT-5020 semi-intensive modular green roof tray system.
Basic Information
| Specification | Detail |
|---|---|
| Tray Size | 500 × 500 × 200 mm (20" × 20" × 8") |
| Coverage | 0.25 m² per module (4 modules per m²) |
| Material | UV-stabilized HDPP |
| Weight | 1.8 kg per module |
| Color | Black |
Water Retention & Drainage
| Specification | Detail |
|---|---|
| Water Retention | ≈ 3.8 L per module (≈ 15.2 L per m²) |
| System Water Holding | ≈ 60 – 85 L per m² (with substrate) |
| Drainage Method | Gravity-driven via multi-directional channels |
| Drainage Continuity | Interconnected modular grid |
Irrigation & Vegetation
| Specification | Detail |
|---|---|
| Irrigation Compatibility | Drip / Sprinkler systems |
| Pipe Diameter Options | Ø16 mm / Ø20 mm |
| Knock-Out Ports | 4-way integrated knock-outs |
| Suitable Vegetation | Lawn, groundcovers, perennials, low shrubs |
| System Type | Semi-intensive green roof |
As the original Chinese manufacturer of the HT-5020 semi-intensive green roof tray system, we maintain full control over production quality, material sourcing, and system performance.
Simple Modular Installation
HT-5020 is designed for fast, efficient rooftop installation using a modular assembly method. No complex structural integration is required.
Step 1 – Position U-Link™ Connectors
Place U-Link™ connectors according to the layout plan to establish alignment points and ensure drainage continuity.
Step 2 – Interlock the Trays
Connect HT-5020 trays into the modular grid system, securing structural alignment across the installation area.
Step 3 – Insert HydroGuard™ Filter
Place the filtration layer inside each tray to separate substrate from the drainage cavity while maintaining capillary water transfer.
Step 4 – Add Growing Substrate
Fill trays with appropriate semi-intensive green roof substrate to the designed depth.
Step 5 – Plant & Irrigation Setup
Install vegetation and connect drip or sprinkler irrigation systems as required.
The modular design allows phased installation, easy replacement, and long-term maintenance flexibility.
No glue. No fabric layering. No complex plumbing. HT-5020 is designed to simplify on-site work while maintaining controlled drainage and modular flexibility.
Why HT-5020 Outperforms Conventional Green Roof Trays
While many green roof trays function as simple planting containers, HT-5020 is engineered as a structural semi-intensive modular system.
The difference lies in depth, drainage continuity, load distribution, and long-term rooftop stability.
Compared with conventional tray systems, HT-5020 is designed to reduce installation complexity, improve drainage continuity, and deliver a cleaner finished result. Its preassembled connector logic, stackable structure, and no-geotextile filter concept make it especially attractive for semi-intensive projects and international supply.
Comparison Overview
| Feature | HT-5020 Semi-Intensive System | Conventional Trays |
|---|---|---|
| Structural Depth | 200mm reinforced tray | Typically shallow (80–120mm) |
| Load Distribution | Even load transfer across interlocked modules | Isolated tray load concentration |
| Drainage System | Multi-directional structural drainage channels | Basic bottom drainage holes |
| Modular Stability | U-Link™ interlocking grid system | Independent trays without structural continuity |
| Water Retention Control | Balanced retention + controlled runoff | Limited retention management |
| Slope Adaptability | Stable on flat and mildly sloped roofs | Reduced stability on slope |
| Long-Term Performance | Designed for semi-intensive rooftop systems | Primarily suited for extensive systems |
HT-5020 is not simply deeper—it is structurally engineered to support semi-intensive rooftop landscapes where performance, durability, and drainage reliability are critical.
For projects requiring more than shallow sedum coverage, HT-5020 delivers a stronger, more adaptable modular green roof tray system.
Who HT-5020 Is Best For
HT-5020 is best suited for distributors, contractors, and project-based buyers looking for a more advanced semi-intensive green roof solution. Selected international retail inquiries are also welcome, especially for premium rooftop garden applications. As all products are supplied from China, freight cost and lead time should be considered in advance for smaller orders.
Ideal for distributors and project supply | Suitable for premium rooftop applications | Shipped internationally from China | Small orders possible upon request
HT-5020 in a Complete Green Roof Build-Up
HT-5020 is the model-specific reference for a semi-intensive modular green roof tray within HOENSOEY’s green roof range. The tray is one part of a complete green roof build-up. Structural capacity, waterproofing, primary drainage and emergency overflow, substrate, planting, irrigation, wind and fire requirements, access, and maintenance remain project-specific.
Before using any dimensional or performance value, confirm that it applies to the current HT-5020 configuration and document revision. Load, water-retention, drainage and installation statements apply only to the documented assembly and conditions; they are not universal project guarantees.
For category-level selection, use the modular green roof tray selection guide. For an HT-5020 enquiry, provide the roof drawing, project location, available build-up, structural review basis, drainage and overflow concept, planting and irrigation brief, access conditions, required quantity, delivery destination and document requirements.
Choosing Between Extensive and Semi-Intensive Systems
For projects requiring lighter planting depth and lower structural load, the HT-508 extensive green roof module may be a suitable alternative. HT-508 is designed for shallow green roof applications such as sedum coverage and lightweight rooftop greening, while HT-5020 supports deeper semi-intensive landscape compositions. Explore HT-508 Extensive Green Roof Module →
Certifications, Testing & Compliance
HT-5020 is manufactured using UV-stabilized HDPP material and developed in accordance with international quality and environmental standards. The system has undergone material verification and durability evaluation to ensure long-term rooftop performance under outdoor exposure conditions.
Material Safety & Compliance
- REACH-compliant raw materials
- Non-toxic, environmentally safe polymer composition
- Suitable for long-term rooftop application
Durability & Performance Testing
- UV resistance testing for outdoor exposure
- Structural integrity verification
- Water retention and drainage performance evaluation
Intellectual Property Protection
HT-5020 structural design and modular configuration are protected by registered design documentation and intellectual property safeguards.
Frequently Asked Questions
1) What planting depth does HT-5020 support?
HT-5020 provides a structural tray depth of 200mm, suitable for semi-intensive green roof applications including lawn, groundcovers, flowering plants, and low shrubs.
2) Is HT-5020 suitable for commercial rooftop projects?
Yes. The modular design and reinforced structure make HT-5020 suitable for commercial rooftops, hospitality terraces, public buildings, and other semi-intensive landscaping environments where stability and drainage performance are required.
3) How does HT-5020 manage drainage and water retention?
HT-5020 integrates multi-directional drainage channels beneath the planting layer. This structure allows controlled water retention while maintaining continuous runoff flow across interconnected modules.
4) Can HT-5020 be installed on slightly sloped roofs?
Yes. The interlocking modular grid system enhances stability and load distribution, making the system adaptable to flat and mildly sloped roof conditions, subject to project-specific structural design.
Ready to Integrate HT-5020 Into Your Project?
Partner directly with a trusted China manufacturer of structural modular green roof tray systems for reliable supply and project support. Whether you are planning a commercial rooftop garden, hospitality terrace, or public infrastructure project, our technical team can assist with product specifications and application guidance.
Small quantity orders are possible upon request, with additional cost considerations for freight and handling.
Have more questions?
For project inquiries, bulk orders, or distributor opportunities, please contact our team directly.
- Whatsapp:+86 18959896697 (wechat)
- Email: roger@hoensoey.com
