2026.10.08 -

How to Choose Between 0.5mm and 1.0mm Geomembrane

I. The difference between 0.5 mm and 1.0 mm

Comparison Item	0.5mm	1.0mm
Weight per ㎡	0.47kg	0.94kg
Puncture resistance	Average	Strong
Water depth capacity	Within 2 meters	Around 5 meters
Welding difficulty	Thin; prone to burn-through leaks	Thick; stable seams
Typical uses	Small fish ponds, lotus ponds,temporary seepage control	Water storage tanks,manure pits, landscape lakes

II. Beyond Price: Four Critical Factors for Liner Thickness Decision-Making

1.Puncture Resistance: Main Source of Leakage
Sharp debris (stones, roots, hard clods) causes most puncture leaks, not water pressure. 0.5mmgeomembrane has ~50% puncture strength of 1.0mm. For rocky subgrade, avoid thinner liner orprepare subgrade. Add geotextile under the liner for poor base.
2.Water Depth: Core Selection Index
Higher water depth brings greater pressure. Reference: 0.5mm for ≤2m depth; ≥0.75mm for over 3m;1.0mm for 5m deep water.
3.Weld Stability: Thicker Liners Are More Weld-Friendly
Thin 0.5mm liner is easy to burn through during welding and needs skilled workers. 1.0mm linerhas higher tolerance and reliable welds. Weld seams are the weakest part of anti-seepage projects.Hire experienced installers.
4.Service Life: Thicker Liners Have Better Durability
UV exposure ages geomembrane from surface. In identical environments, 1.0mm geomembrane lasts far longer than 0.5mm. Service life changes with working conditions.

How to Choose Geomembrane

III. How to Select the Right Geomembrane Thickness for Your Application

Application	Recommended Thickness	Note
Small fish pond, lotus pond,shrimp pond (≥2m)	0.5mm	Suitable for low-pressure and shallow water conditions.
Intensive fish pond, water reservoir	0.5-0.75mm	Water depth 2-3m, select based on subgrade conditions.
Medium storage pond,landscape lake	0.75-1.0mm	Higher thickness recommended for deep water conditions.
Manure pond, biogas slurry pond	Starting from 1.0mm	Higher anti-seepage reliability required for corrosive media.
Biogas tank base liner	1.0-1.5mm	Long-term contact with biogas slurry, thicker liner recommended.
Oxidation pond, wastewater pond	1.0mm or above	Higher chemical corrosion resistance required.
Landfill, tailings pond	1.5-2.0mm	High standard anti-seepage, follow design or tender requirements.

Ⅳ. Confirm These 3 Key Points

1. Water Depth?
Sets minimum liner thickness
2. Stored Medium?
Clean water / manure / chemicals, different,requirements
3. Subgrade Condition?
Check gravel, confirm if geotextile protection is ronuirod

The Bottom Line

Go 0.5mm if you’re lining a pond, fish farm, or light-duty waterproofing job on smooth ground.
Go 1.0mm if it’s a landfill, mining pad, wastewater lagoon, or any long-term containment where failure is not an option.

Not sure which thickness your project calls for? Send us your application details and subgrade conditions — we’ll help you spec the right liner at the right price.