T-Grip Membranes

If you’re looking for a reliable solution for waterproofing and sealing concrete surfaces in industrial and infrastructure projects, our T-Grip geomembrane is the ideal choice. Designed for mechanical bonding with concrete, this product is made from high-quality raw materials and complies with international standards. It offers exceptional durability and resistance to chemical and physical factors. With its unique features, it significantly enhances the safety, performance, and longevity of your structure.

Farnam Baspar t-grip membrane specification

Farnam Baspar’s T-Grip Geomembrane is a high-density polyethylene (HDPE) liner engineered with T-shaped anchoring ribs on the back surface for mechanical embedment into concrete structures. It is designed for permanent sealing of water-retaining concrete elements such as tanks, tunnels, channels, and treatment plants. With high chemical resistance, hydrostatic durability, and secure weldability, this liner ensures long-term waterproofing performance. The table below outlines its key technical specifications.

PROPERTY	TYPICAL VALUE	STANDARD/TEST METHOD
MATERIAL	HDPE (High Density Polyethylene)	-
SHEET THICKNESS	2.0 – 5.0 mm	ASTM D5199
SHEET WIDTH	2.0 – 3.0 m	Manufacturer Spec
T-GRIP PROFILE TYPE	T-shaped anchor ribs	Design Spec
T-GRIP PROFILE HEIGHT	3.5 – 15 mm	Design Spec
T-GRIP SPACING (PITCH)	25 – 100 mm	Layout Drawing / Spec
T-GRIP SHAPE	Rectangular or rounded	Visual Spec
TENSILE STRENGTH (MD/TD)	≥ 20 – 30 MPa	ASTM D638 / ISO 527
ELONGATION AT BREAK	≥ 600%	ASTM D638
HYDROSTATIC PRESSURE RESISTANCE	≥ 1.0 MPa (10 bar)	ASTM D751
CHEMICAL RESISTANCE	Excellent – resistant to acids, bases, hydrocarbons	ASTM
UV RESISTANCE	Moderate – suitable for short-term exposure	ASTM G154
WELDABILITY	Excellent (hot wedge or extrusion welding)	Field Practice
INSTALLATION SURFACE	For embedment in cast-in-place concrete	Manufacturer Design Guide

Key features and advantages of Farnam Baspar t-grip membrane

1. Secure Mechanical Anchorage into Concrete:
   The T-shaped anchor ribs ensure permanent embedment within concrete, enabling durable sealing.
2. High Hydrostatic Pressure Resistance:
   Ideal for structures exposed to internal or external water pressure, such as tanks, tunnels, and treatment plants.
3. Excellent Chemical Resistance:
   Withstands exposure to acids, alkalis, salts, and industrial wastewater—suitable for aggressive environments.
4. Long-Term Durability and Dimensional Stability:
   Made from HDPE with excellent resistance to environmental stress and deformation.
5. Reliable Weldability:
   Supports hot-wedge or extrusion welding methods for leak-proof jointing on site.
6. Permanent Integration with Concrete Structures:
   Once cast-in-place, the membrane remains fixed, eliminating risk of displacement or water ingress.

Farnam Baspar t-grip membrane standards

Farnam Baspar’s T-Grip HDPE geomembrane is produced and tested according to the following international standards:

1. ASTM D5199 – Standard Test Method for Measuring Geomembrane Thickness
2. ASTM D638 / ISO 527 – Tensile Properties of Plastics (HDPE)
3. ASTM D1004 – Tear Resistance of Plastic Films
4. ASTM D570 – Water Absorption and Moisture Stability
5. ASTM D5322 – Chemical Compatibility Testing with Aggressive Liquids
6. ASTM D751 – Hydrostatic Resistance under Water Pressure
7. ASTM G154 / G155 – UV Resistance Testing of Plastics
8. ISO 9001:2015 – Quality Management System in Manufacturing
9. ISO 17025 – Competence of Testing and Calibration Laboratories
10. DIN 16734 / EN 13967 – European Standards for Waterproofing Sheets for Concrete Embedment

T-Grip Membranes price in Iran

The cost of T-Grip membranes per square foot can vary depending on several factors, such as the size, thickness, and material used. Additionally, the cost of installation and shipping may also affect the final price.

It is always best to get the current price from the experts. You can contact Farnam Baspar to get its price in Iran.

Why choosing Farnam Baspar?

Farnam Baspar is one of Iran’s leading geosynthetic manufacturers, with over two decades of experience delivering engineering-grade solutions for civil, environmental, industrial, and infrastructure projects. As the country’s top producer of T-Grip membranes, Farnam Baspar offers high-quality products at globally competitive prices—making it a trusted choice for durable and cost-effective geosynthetic solutions.

1. Manufacturing in compliance with ASTM, ISO, and GRI international standards
2. A full product range: smooth and textured geomembranes, T-Grip liners, geotextiles, geogrids, geodrains, combo grids, and welding rods
3. State-of-the-art production lines and ISO 17025-certified quality control laboratory
4. Capability for custom production based on project specifications and environmental conditions
5. Proven track record in major national and international projects

Frequently asked questions

How strong is T-Grip membranes?

Generally, T-Grip membranes made from high-density polyethylene (HDPE) have high tensile strength, as well as excellent resistance to puncture, tearing, and UV degradation. The tensile strength of HDPE T-Grip membranes can range from 20 to 40 pounds per inch (PPI), depending on the specific product and manufacturer.

When should T-Grip membranes be used?

1. Landfills
2. Mining
3. Water storage
4. Slope stabilization
5. Secondary containment

How is T-Grip membranes installed?

1. Site preparation
2. Geotextile underlayment
3. T-Grip membrane installation
4. Seaming
5. Inspection
6. Cover material installation

How do I choose the right t-grip geomembrane for my project?

How to Choose the Right T-Grip Geomembrane for Your Project

1. Project Type and Application
   • Concrete Structures: T-Grip geomembranes are specifically designed for installation in fresh concrete (e.g., tanks, tunnels, canals, foundations). If your project involves concrete casting and requires reliable waterproofing, T-Grip is the best choice.
   • Soil or Granular Subgrade: For earthen ponds, reservoirs, or landfills, smooth or textured geomembranes are more common; T-Grip is mainly used when mechanical bonding with concrete is required.
2. Material Type (HDPE or PVC)
   • HDPE T-Grip: High chemical resistance and long-term durability, ideal for industrial tanks, wastewater treatment plants, and chemically aggressive environments.
3. Thickness Selection
   • Common thicknesses range from 2.0 to 3.0 mm.
   • For heavy-duty projects with high hydrostatic pressure (such as large reservoirs or high-load structures), 3.0 mm geomembranes are recommended.
4. Anchor Stud Design
   • The height and spacing of the studs directly affect bonding strength with concrete.
   • For structures under high pressure, geomembranes with denser and taller studs provide stronger mechanical interlock.
5. Environmental and Chemical Conditions
   • In environments with chemicals or industrial effluents, HDPE T-Grip is the more reliable option.
   • For tunnels and foundations, HDPE T-Grip is often preferred due to its flexibility.
6. Standards and Installation
   • The product should comply with international standards (ASTM, GRI, DIN, etc.).
   • Project success also depends on professional installation teams and the use of specialized welding equipment.

To select the right T-Grip geomembrane, consider the project type (concrete vs. soil), the required material (HDPE or PVC), thickness, stud design, and environmental/chemical conditions. Ultimately, proper installation by experienced crews is just as important as product selection.

What is the lead time for t-grip geomembrane?

Lead Time for T-Grip Geomembrane

• Production Time: Since T-Grip geomembranes are often custom-made (with specific thickness, width, or panel size), production time typically ranges from 2 to 3 weeks, depending on order volume.
• Stock Availability: If standard sizes are available in stock, delivery can be arranged within just a few working days.
• Domestic Transportation: For local deliveries, shipping usually takes 2 to 7 working days, depending on project location.
• International Shipping: For export orders, lead time depends on the shipping method:
  • Sea freight: 4 to 6 weeks, depending on the destination

Summary: The lead time for T-Grip geomembranes generally ranges between 3 to 6 weeks from order placement, depending on order volume, stock availability, and shipping method.

Do you offer a warranty on t-grip geomembrane?

Warranty for Farnam Baspar T-Grip Geomembranes

Yes, Farnam Baspar’s T-Grip geomembranes are supplied with a manufacturer’s quality warranty, reflecting our commitment to delivering durable products that comply with international standards.

1. Manufacturer’s Warranty:
   T-Grip geomembranes are guaranteed for the quality of raw materials, uniform thickness, consistency of anchor studs, and compliance with recognized international standards such as ASTM, EN, and ISO.
2. Warranty Duration:
   Depending on the material type (HDPE ,LLDPE), selected thickness, and project requirements, the warranty period typically ranges from 5 to 10 years.
3. Warranty Coverage:
   The warranty covers the retention of mechanical properties within the specified period, absence of manufacturing defects, and stability under normal environmental conditions.
   However, installation, subgrade preparation, and site execution are the responsibility of the project contractor and are not included under the manufacturer’s warranty.
4. Use in Civil and Industrial Projects:
   Farnam Baspar’s T-Grip geomembranes are engineered for waterproofing of concrete structures such as tanks, tunnels, canals, and foundations. Their long-term performance is assured when properly installed by qualified and experienced contractors in accordance with international standards.

In summary: Farnam Baspar’s T-Grip geomembrane warranty focuses on product quality and compliance with technical specifications, while the responsibility for proper installation rests with specialized contractors.

Are your t-grip geomembrane sheets resistant to chemicals?

Yes, our geomembranes offer excellent chemical resistance, which makes them an ideal choice for environmental and industrial containment applications.

1. Resistance to a Wide Range of Chemicals:
   • HDPE and LLDPE geomembranes provide outstanding resistance against acids, bases, salts, and most organic and inorganic compounds. For this reason, they are extensively used in landfills, industrial wastewater ponds, and mine tailings storage facilities.
2. Long-Term Durability:

The polymeric structure of these products ensures that they maintain their mechanical and hydraulic properties even under long-term exposure to aggressive fluids.

3. Limitations and Considerations:

Although geomembranes resist most chemicals, certain aromatic hydrocarbons, heavy oils, and strong organic solvents may require specific Chemical Compatibility Testing to confirm suitability.

In summary, our HDPE, LLDPE, T-grip geomembranes are engineered to deliver reliable and long-lasting containment performance in chemically aggressive environments.

How long do Farnam Baspar’s t-grip geomembrane last?

Farnam Baspar’s geomembranes are manufactured using premium raw materials and optimized formulations, ensuring a very long service life.

1. Designed Lifespan:

Our HDPE and LLDPE geomembranes, when properly installed and maintained, can deliver safe and reliable performance for over 50 years.

2. Resistance to Harsh Environmental Conditions:

These products are engineered to withstand UV exposure, temperature fluctuations, and moisture variations, while retaining their mechanical integrity and impermeability over the long term.

3. Special Applications:

For projects involving direct contact with aggressive chemicals, chemical compatibility assessments are recommended to provide additional assurance of durability and service life.

4. Quality Standards:

Farnam Baspar geomembranes are manufactured in compliance with international standards such as ASTM and GRI, ensuring long-term durability and consistent performance in civil and environmental engineering applications.

In summary, Farnam Baspar’s geomembranes are designed and produced for long-lasting and reliable service, making them one of the most technically and economically efficient solutions for demanding projects.

Is special equipment required for installation t-grip geomembrane?

Yes, the installation of gripped geomembranes requires specialized equipment and experienced crews to ensure watertight performance and long-term durability of the system.

1. Thermal Welding Equipment:
   The most essential tools for installation are wedge welders for main seams and extrusion welders for details, corners, and penetrations. These machines allow the creation of strong, impermeable seams in compliance with international standards.
2. Subgrade / Concrete Preparation Equipment:
   For projects where geomembranes are installed over soil or granular subgrade, leveling and compaction must be carried out using earthmoving and compaction machinery.
   However, for gripped geomembranes, the product is specifically designed for direct installation in fresh concrete. In this case, the surface does not need to be smooth or finished—the anchor studs of the geomembrane embed into the fresh concrete and create a secure mechanical bond.
3. Quality Control Tools:
   To ensure seam integrity, field tests such as air pressure testing, vacuum box testing, and, where applicable, spark testing are conducted during installation.
4. Safety Equipment:
   The use of appropriate personal protective equipment—including safety boots, heat-resistant gloves, and fall-protection systems on slopes or elevated areas—is mandatory depending on site conditions.
5. Specialized Installation Teams:
   The successful installation of gripped geomembranes requires trained and experienced crews who are skilled in operating specialized welding equipment and strictly follow international standards.

In summary: The installation of gripped geomembranes cannot be achieved without specialized equipment and professional teams. These products can be applied not only over soil subgrades but also directly onto fresh concrete, without requiring the concrete surface to be smooth or finished.

What is your return policy for t-grip geomembrane?

Farnam Baspar is committed to delivering geomembrane products of the highest quality, fully compliant with international standards. Nevertheless, to ensure customer confidence, our return policy is defined as follows:

1. Defective or Manufacturing-Fault Products
   If a product is found to have a manufacturing defect, non-conforming thickness, or damage incurred during transportation, customers may return the goods. After technical inspection, the product will either be replaced or refunded.
2. Return Conditions
   • The product must not have been used or installed.
   • Rolls must be returned in their original factory packaging.
   • Return requests must be submitted within 30 days of delivery.
3. Non-Returnable Items
   Customized orders (e.g., products manufactured with special thicknesses or widths) are non-returnable due to their tailored nature, unless a proven manufacturing defect exists.
4. Shipping and Costs
   • In cases of verified manufacturing defects, all transportation and replacement costs will be covered by Farnam Baspar.
   • For other return requests, logistics expenses will be borne by the customer.

By implementing this policy, Farnam Baspar guarantees product quality while ensuring long-term customer trust and satisfaction.

How is t-grip geomembrane shipped, and what are the delivery options?

Due to their large dimensions and sensitivity to mechanical damage, geomembranes require specialized packaging and handling. Farnam Baspar manages the shipping and delivery process in accordance with international standards.

1. Standard Packaging:

Geomembrane rolls are supplied as tightly wound coils, covered with protective wrapping (plastic sheeting and, in some cases, palletized) to safeguard against moisture, dust, and potential damage during transport.

2. Modes of Transportation:
   • For smaller quantities or domestic projects, shipping is typically carried out by truck or trailer.
   • For large-scale or international projects, sea freight in standard containers is the most common method.
3. Delivery Options:
   • Ex-Works (EXW): The customer arranges and is responsible for transportation.
   • Delivered to Site: Farnam Baspar organizes logistics and delivers the product directly to the project site.
   • Other Incoterms (FOB, CIF, etc.) can be applied based on contractual agreements.
4. Farnam Baspar Advantage:

With extensive experience in both domestic and international projects, Farnam Baspar’s logistics team ensures the fastest, most reliable, and cost-effective shipping and delivery solutions for its clients.