AHDPE geomembranetypically lasts25 to 70 years, depending on thickness, UV exposure, chemical environment, and installation quality.
The lifespan varies a lot by material and conditions:
- HDPE (high-density polyethylene): the most common type, with a service life of roughly 25–50 years in most applications, and up to 50–70 years for thicker, well-protected installations.
- PVC liners: much shorter, around 3–5 years, especially when exposed to sunlight.
- EPDM rubber: offers good UV and chemical resistance, but no fixed lifespan is stated in the available data.
???? What affects longevity
- Thickness: thicker membranes last longer — a 3.0mm sheet will outperform a 0.5mm one over time.
- UV exposure: prolonged sunlight degrades polymers; black HDPE with carbon black is among the most UV-resistant options.
- Chemical contact: acids, alkalis, solvents, and leachates accelerate aging.
- Temperature: higher operating temperatures significantly shorten lifespan — one study on PVC-P found expected service lives of 19–48 years at 20°C depending on formulation.
- Installation quality: punctures, poor seaming, or sharp protrusions under the liner can trigger early brittle failure.
