28/07/2026
TekDrain GDL 500/150 is a professional drainage board manufactured with a high-density polyethylene (HDPE) core and a geotextile filter layer, providing excellent compressive strength and long-lasting protection. Designed for foundation walls, retaining walls, below-grade structures, and other soil-contact applications, it protects waterproofing and thermal insulation systems against moisture, groundwater, and soil pressure.
Its studded HDPE structure creates an effective drainage cavity, while the geotextile filter prevents soil particles from clogging the drainage channels, allowing water to drain safely away from the structure.
TekDrain GDL 500/150 features a composite construction consisting of:
Technical values are based on laboratory testing and may vary depending on site conditions.
With a compressive resistance of 150 kN/m², the board withstands significant soil pressure.
Allows water to pass while preventing soil particles from clogging the drainage system.
Provides excellent resistance to roots, chemicals, decay, and long-term environmental exposure.
Protects waterproofing and thermal insulation layers against mechanical damage during backfilling.
The studded profile creates air channels that allow retaining walls to breathe and remain dry.
Supplied in convenient roll form for fast and efficient installation.
Offers excellent UV resistance and chemical stability for reliable long-term performance.
Packaging
Storage
Store the rolls upright in a dry location, protected from direct sunlight.
Shelf Life
The product maintains its performance indefinitely provided it is protected from mechanical deformation during storage.
It is suitable for foundation walls, retaining walls, green roofs, terraces, basements, and other below-grade or soil-contact applications.
It consists of an HDPE drainage core laminated with a geotextile filter layer.
The board provides a compressive strength of 150 kN/m², making it suitable for areas exposed to significant soil pressure.
The HDPE core is waterproof, while the geotextile layer allows water to filter through into the drainage channels while preventing soil intrusion.
Yes. The HDPE structure provides excellent resistance to root penetration, chemicals, and biological degradation.
TekDrain GDL 500/150 is a durable HDPE drainage board with an integrated geotextile filter, designed to protect foundations and retaining walls against moisture, groundwater, and soil pressure while ensuring efficient long-term drainage performance.
