TekDrain GF 25/200 Green Roof Drainage Board | 200 kN/m² HDPE Drainage System
TekDrain GF 25/200
Reliable Water Management in Green Roof Systems
Green roofs, one of the essential elements of sustainable architecture, improve building energy efficiency while contributing to the ecological balance of urban environments. In these systems, drainage boards play a critical role in ensuring long-term performance and durability.
TekDrain GF 25/200 is a professional drainage solution manufactured from HDPE (High-Density Polyethylene), combining high mechanical strength with environmentally friendly properties. It provides effective water storage and controlled drainage for modern green roof applications.
Product Description
TekDrain GF 25/200 is manufactured from root-resistant and rot-resistant HDPE material. With its 25 mm stud height, it stores rainwater and directs excess water toward parapets according to the roof slope, ensuring safe drainage.
The product provides two functions in a single system:
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Water storage for vegetation support
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Controlled drainage to prevent water accumulation
This balanced water management system helps maintain healthy plant growth while protecting the roof structure.
Technical Specifications
| Property | Value |
|---|
| Product Name | TekDrain GF 25/200 |
| Raw Material | HDPE (High-Density Polyethylene) |
| Compressive Strength | 200 kN/m² (TS EN ISO 25619) |
| Stud Height | 25 mm |
| Water Retention Capacity | 5 L/m² |
| Dry Weight | 1.1 kg/m² |
| Weight When Filled with Water | 4.5 kg/m² |
| Board Dimensions | 1 x 2 m (sheet) |
| Water Flow Rate (i=0.01) | 0.95 L/(m·s) |
| Water Flow Rate (i=0.02) | 1.35 L/(m·s) |
| Water Flow Rate (i=0.03) | 2.10 L/(m·s) |
| Certification | CE Certified – TS EN ISO 25619 Compliant |
Product Features and Advantages
High Compressive Strength
With a compressive strength of 200 kN/m², TekDrain GF 25/200 provides long-term performance without deformation in:
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Terrace roof systems
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Landscaped areas above parking structures
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High-load green roof applications
Water Storage and Drainage Function
The system stores 5 L/m² of water, reducing irrigation requirements for plants. Excess water is safely directed toward drainage points.
Energy Efficiency
Green roof systems supported by TekDrain GF 25/200 help reduce heat transfer, contributing to:
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Lower cooling costs in summer
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Reduced heating requirements in winter
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Lower carbon emissions
Root Resistant and Durable Structure
The HDPE structure provides resistance against:
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Plant root penetration
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Chemical effects
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Rotting
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Underground environmental conditions
Urban Water Management
By storing rainwater and controlling excess water discharge, TekDrain GF 25/200 helps reduce pressure on urban drainage infrastructure.
Protection Against Solar Radiation
The drainage layer helps protect roof membranes from excessive heat exposure, extending the service life of the roofing system.
Applications
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Terrace roofs
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Landscaped areas above parking structures
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Vegetated green roof systems
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Urban gardens
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Green façade applications
Installation Method
After placing the root-resistant membrane, İzoTeknik 5000 or 6500 series is installed. Then, TekDrain GF 25/200 boards are placed side by side.
A GeoTeknik 1100 PP geotextile layer is installed above the drainage boards. This configuration allows plant roots to access the water reservoir while maintaining balanced drainage performance.
Packaging and Storage
Packaging
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Sheet dimensions: 1 x 2 m
Storage Conditions
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Store horizontally
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Protect from direct sunlight
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Keep in a dry storage environment
Environmental Benefits
TekDrain GF 25/200 is an environmentally friendly drainage solution that:
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Reduces irrigation requirements through water storage
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Supports rainwater management
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Helps minimize the urban heat island effect
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Contributes to sustainable building practices
It can also provide additional advantages in green building certification systems such as LEED and BREEAM.
Conclusion
With its high mechanical strength, 25 mm stud height, and 5 L/m² water retention capacity, TekDrain GF 25/200 provides an effective drainage solution for green roof systems.
Combining energy efficiency, durable HDPE performance, and environmental sustainability, it offers advanced performance for modern green building projects.
Frequently Asked Questions (FAQ)
What is TekDrain GF 25/200?
It is a green roof drainage board manufactured from HDPE that combines water storage and drainage functions in a single system.
What is the compressive strength of the product?
The compressive strength is 200 kN/m², making it suitable for terrace roofs and landscaped areas above parking structures.
What is the water retention capacity?
It can store 5 L/m² of water, helping reduce plant irrigation requirements.
Where can TekDrain GF 25/200 be used?
It is suitable for terrace roofs, green roofs above parking structures, green façade systems, and urban garden applications.
What are the environmental benefits?
It reduces energy consumption and carbon emissions, improves water management, and contributes to green building certification processes.
TekDrain GF 25/200 provides a durable combination of water retention, controlled drainage, and high-strength HDPE protection, making it an effective solution for sustainable green roof systems.