Everything About Proper and Leak-Proof Pool Waterproofing
Introducing Geomembrane Technology and the Role of Khanjani Polymer Industries in Its Development in Iran
Introduction
Pool waterproofing is one of the most crucial stages in constructing agricultural reservoirs, fish farms, water storage ponds, and even decorative pools. Any leakage can lead to water loss, structural damage, soil erosion, and significant financial losses.
In the past, traditional methods such as cement coating, bitumen layers, or reinforced concrete were used for waterproofing. However, these methods were costly, time-consuming, and had a short lifespan.
With the advancement of modern technologies, geomembrane sheets have become the most reliable, economical, and durable solution for waterproofing pools.
What Is a Geomembrane?
Geomembrane is a polymer sheet with extremely low permeability, made from high-density polyethylene (HDPE) or low-density polyethylene (LDPE / LLDPE).
These sheets are produced in various thicknesses (typically from 0.5 to 2 mm) and in black or blue colors.
The key feature of geomembrane is its high resistance to water penetration, chemicals, UV radiation, and temperature changes.
For this reason, geomembrane has replaced traditional sealing methods in civil, environmental, and agricultural projects.
Advantages of Using Geomembrane Sheets in Pool Waterproofing
100% Leak-Proof Sealing:
Installed seamlessly using specialized welding equipment, leaving no path for water leakage.
Long Service Life (Over 50 Years):
Highly resistant to sunlight, UV radiation, and chemical exposure.
Fast and Easy Installation:
Much faster than concrete or mortar methods, with no curing time required.
Lower Cost Compared to Concrete:
The total cost of a geomembrane-lined pool is typically 40–60% less than a reinforced concrete pool.
Removable and Reusable:
Sheets can be dismantled and reused elsewhere if needed.
Environmentally Friendly:
Made from non-toxic and recyclable polymer materials.
Types of Geomembrane Sheets for Pool Waterproofing
HDPE Geomembrane (High-Density Polyethylene):
The most resistant type against chemicals and UV rays—ideal for water reservoirs and heavy-duty industrial applications.
LLDPE Geomembrane (Linear Low-Density Polyethylene):
More flexible and suitable for uneven or sloped ground surfaces.
PVC or EVA Geomembrane:
Softer and lighter, but less resistant to sunlight—commonly used for temporary or decorative applications.
Steps for Installing Geomembrane Pool Waterproofing
Subgrade Preparation:
The soil must be compacted and leveled to eliminate sharp objects. In many projects, a geotextile layer is placed beneath the geomembrane for added protection.
Sheet Deployment:
Geomembrane rolls are laid according to the design layout over the base and walls of the pond.
Seam Welding:
Sheet overlaps are welded using extrusion welders or dual-track hot wedge welders, ensuring a fully watertight and homogeneous joint.
Testing and Quality Control:
After welding, seams are tested using vacuum or air-pressure tests to verify leak-proof sealing.
Protective Layers (If Required):
In chemical or industrial ponds, additional geotextile or geodrain layers may be used for protection.
Why Geomembrane Is the Best Choice for Agricultural Pools
In arid and semi-arid regions of Iran—where water loss is a major issue—geomembrane liners can prevent up to 98% of leakage.
They also remain stable under extreme temperatures, ranging from -60°C to +80°C, making them ideal for Iran’s diverse climates.
Khanjani Polymer Industries: The Pioneer of Geomembrane Production in Iran
Among domestic manufacturers, Khanjani Polymer Industries stands as the first and largest producer of geomembrane sheets in Iran.
Using advanced technology and high-quality raw materials, the company produces HDPE and LLDPE geomembranes in full compliance with ASTM and GRI GM13 international standards.
Key Features of Khanjani Geomembrane:
- Thickness range from 0.5 mm to 3 mm
- Excellent tensile and tear strength
- Superior UV resistance
- Outstanding chemical resistance to fertilizers and acids
- Large roll dimensions to minimize seams in installation
Geomembrane Welding Machines by Khanjani Polymer Industries
One of the challenges in accurate and efficient geomembrane installation is the availability of reliable welding equipment.
Khanjani Polymer Industries, leveraging its long experience in geomembrane manufacturing and installation, has designed and produced geomembrane welding machines domestically.
These machines are engineered for dual-track welding, extrusion welding, and pressure testing, offering:
Precise temperature and speed control
Easy operation in outdoor conditions
Compatibility with both HDPE and LLDPE sheets
This innovation has enabled Iran to achieve self-sufficiency in geomembrane project execution and reduce foreign equipment costs.
Wide Applications of Khanjani Geomembranes
Beyond water reservoirs, Khanjani geomembranes are widely used in:
- Landfills and industrial evaporation ponds
- Agricultural irrigation canals
- Fish and shrimp farming ponds
- Oil, gas, and petrochemical projects
- Mining tailing dams and sedimentation ponds
Such versatility demonstrates the quality and engineering reliability associated with the Khanjani brand.
Key Maintenance Tips for Geomembrane-Lined Pools
- Avoid dropping sharp or heavy objects into the pool.
- Use soft, non-metallic tools for cleaning.
- In areas with strong sunlight, use UV-stabilized sheets.
- Conduct annual seam inspections to ensure integrity.
Conclusion
Using geomembrane sheets for pool waterproofing is a modern, cost-effective, and long-lasting solution that is rapidly replacing traditional methods across Iran.
As the first and largest geomembrane producer in Iran, Khanjani Polymer Industries has played a vital role in localizing this technology.
By providing premium-quality geomembrane sheets and specialized welding machines, the company has paved the way for sustainable development and water conservation nationwide.
Indeed, wherever there is a need for reliable, leak-proof pool waterproofing with geomembrane, the name Khanjani Polymer Industries stands as a symbol of Iranian quality, innovation, and trust.