Key Factors to Consider When Selecting a Membrane

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Things to keep in mind include:

1. Design Life – Ensure the membrane's expected lifespan and warranty align with your project’s needs.

2. UV Stability – For exposed membranes, opt for those that can withstand UV exposure and weather conditions for their intended duration.

3. Chemical Compatibility – Different membranes react differently to chemicals. Choose a membrane based on the chemical exposures it will face throughout its life.

4. Dimensional Stability – Important for covered membranes, as wrinkles can lead to delays and weaknesses in the liner system.

5. Flexibility – Membranes need to adapt to uneven subgrades and allow for differential settlement of base materials. Ensure long-term flexibility.

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6. Construction Schedule and Location – Be aware of installation timelines and any remote or difficult access issues.

7. Regulations – Ensure compliance with state and federal rules. Consult FGI if regulations do not permit the membrane that best suits your project.

Guidelines for Deciding Between RPE and RPP Liners

At BTL Liners, we specialize in the fabrication of liners, tarps, and covers from reinforced polyethylene (RPE) and reinforced polypropylene (RPP) materials. Having installed nearly a billion square feet of RPE liners, we have become a trusted name in the industry. We're often asked when to use RPE liners versus RPP liners. This discussion highlights the differences between these liner types and when each is best applied.

Key Differences Between RPE and RPP Liners

The primary distinction lies in their manufacturing process. RPE liners are coated with liquid plastic, whereas RPP liners undergo a coating and pressing process. RPP's pressing method allows the coating to penetrate and integrate with the scrim, enhancing surface welding and preventing peeling. This results in a thicker coating for RPP liners.

Ideal Applications for RPP Liners

RPP liners are suited for above-ground containment, including drop-in liners and floating covers. They perform well inside tanks and are ideal for environments with low byproduct and chemical mixtures. Their resistance to chemicals, UV, and weather conditions makes them perfect for wastewater treatment plants, secondary containment, and floating covers.

Perfect Uses for RPE Liners

RPE liners excel in water containment due to their superior puncture and tear resistance. Manufactured using only virgin resins and coated with LLDPE, they offer excellent UV and abrasion resistance. RPE liners are highly impermeable and are best for ponds, irrigation canals, reservoirs, and temporary soil remediation projects.

Both RPP and RPE liners have their unique advantages and are suitable for various applications. RPE is generally preferred for water containment, while RPP works well for floating covers and secondary containment. Contact BTL Liners for more information on which type is best for your specific needs.

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