Roll 50-100m, thick 1.5mm
When discussing modern waterproofing solutions for residential and infrastructure projects, materials with high strength, long service life, and chemical stability are always top priorities. In this category, the Fosroc HDPE 1.5mm waterproofing membrane is considered an international-standard option thanks to its excellent ability to protect structures throughout their entire lifespan.
The Fosroc HDPE 1.5mm waterproofing membrane is a synthetic sheet made from high-density polyethylene (HDPE), manufactured using single-layer or multi-layer extrusion technology, with a standard 1.5mm thickness. It is used for waterproofing foundations, basements, reservoirs, landfills, and structures exposed to water or aggressive chemicals. The membrane has high tensile strength, UV resistance, does not degrade, and remains stable in harsh environments.
The performance of Fosroc’s HDPE membrane comes from its highly crystalline polymer structure, making the material virtually impermeable, with a permeability coefficient far lower than traditional materials such as cement, coatings, or bitumen membranes. The 1.5mm thickness is considered optimal for underground works and areas requiring strong puncture resistance.
Thanks to its chemical stability, the membrane is unaffected by acids, alkalis, salts, and industrial solutions, making it suitable for water-treatment facilities, sanitary landfills, and landscape ponds. The Fosroc brand meets numerous ASTM and ISO standards and is used in over 80 countries, providing strong assurance for contractors and project owners.
Understanding the structure allows users to accurately assess the material’s performance under real-world conditions. For underground structures or chemical-exposed facilities, the layer-by-layer design of the Fosroc HDPE 1.5mm membrane directly determines its durability, water-tightness, and overall system safety.
This base layer is made from high-density polyethylene with a dense crystalline structure that minimizes water pathways. It provides the primary waterproofing function and can offer a lifespan of more than 50 years with proper installation. HDPE also has high tensile strength (20–30 MPa), good elongation, and does not rot or oxidize in underground environments.
In the 1.5mm version, Fosroc optimizes the thickness to increase resistance to mechanical impact, especially on subgrades that are not perfectly smooth. Puncture resistance according to ASTM D4833 usually ranges from 400–600 N, ensuring safety during installation and operation.
Some Fosroc HDPE 1.5mm variants have textured surfaces to increase friction with protective layers or backfill soil, reducing slippage in sloped areas. This is particularly useful for artificial ponds, aquaculture ponds, or zones with fluctuating loads.
Joints are welded using dual-track hot-wedge technology, creating two parallel seams with a test channel for pressure inspection. In most projects, joint quality determines up to 70% of the waterproofing performance, making welding procedures and seam testing mandatory under ASTM standards.
To ensure durability and stability, Fosroc follows international testing standards, including:
These indicators allow investors to evaluate material quality before selection.
In many Vietnamese infrastructure projects, engineers often struggle to choose the correct variant because the same membrane thickness can come in several configurations tailored to different geological conditions. During basement and technical reservoir installations in a southern project, the technical team had to compare internal specifications of the Fosroc HDPE 1.5mm membrane to ensure long-term stability. This shows that even with the same thickness, the material is clearly categorized by intended use and surface characteristics.
The most commonly used variant. The smooth surface improves seam sealing, speeds installation, and suits applications requiring absolute waterproofing such as basements, foundations, and water-retaining structures. The low friction surface reduces scratching during installation. This type is preferred in projects prioritizing mechanical durability and efficient installation.
Designed to increase friction with soil or protective concrete. In bioponds, deep pits, or sloped areas, the textured surface helps prevent membrane slippage during backfilling or water-level changes. It offers better stability in complex terrain but requires more careful handling.
Industrial wastewater reservoirs or areas with continuous acid/alkali exposure require membranes with stronger chemical resistance than the standard version. Fosroc offers HDPE 1.5mm variants with enhanced thermal stabilizers and increased oxidation-induction time (OIT) to maintain long-term performance. These membranes resist brittleness, cracking, and mechanical degradation over years of chemical exposure.
Many contractors using liquid coatings or traditional waterproofing paints have encountered peeling, reverse seepage, and durability loss after 3–5 years. Switching to the Fosroc HDPE 1.5mm membrane significantly improves longevity and stability while reducing maintenance costs. However, every material has limitations, and understanding them ensures better project outcomes.
These advantages make the Fosroc HDPE 1.5mm membrane a standard choice for high-safety projects.
These issues can be mitigated with professional installers and mandatory seam testing.
Many structures have suffered reverse seepage, foundation cracking, or water loss after using traditional waterproofing materials. Switching to Fosroc HDPE 1.5mm significantly increases stability and lifespan, eliminating most of these risks.
Underground environments always contain lateral and upward water pressure. The Fosroc HDPE 1.5mm membrane forms a continuous “waterproof shell” around foundations and retaining walls. It withstands load and is unaffected by soil chemicals, making it suitable for high-rise buildings, townhouses, and projects near groundwater.
For landscape ponds, bioponds, or technical aquaculture reservoirs, materials must withstand temperature fluctuations and UV exposure. Fosroc HDPE 1.5mm provides high tensile strength and surface stability, reducing aging and ensuring better water retention.
Industrial effluents typically contain acids, alkalis, and harsh chemicals. Fosroc HDPE 1.5mm offers superior chemical inertness, resisting brittleness and degradation. It is used for sedimentation tanks, wastewater collection pits, equalization ponds, and chemical-exposed areas.
With strong puncture resistance, the membrane suits subgrades containing gravel or sharp materials. It ensures long-term tightness under changing loads, providing safety for technical trenches, underground pipelines, and drainage systems.
Not all HDPE meets Fosroc standards. Mechanical properties such as tensile strength, OIT, and puncture resistance vary significantly depending on raw-material quality. Only ASTM-certified products guarantee long-term durability.
The 1.5mm thickness is optimized for mechanical performance and cost. Using overly thick material does not significantly improve waterproofing but increases project cost. Fosroc selected 1.5mm because it suits most underground and technical water-retaining structures.
While durable, HDPE is not immune to sharp objects. Failing to use cushioning layers (e.g., geotextile) or not cleaning the subgrade is the main cause of punctures. This is not a material defect but an installation error.
HDPE welding requires specialized equipment, correct procedures, and seam testing using air-pressure or vacuum testing. Even minor errors can cause seam leakage. Thus, installation quality directly affects membrane performance.
The current price for genuine Fosroc HDPE 1.5mm membrane is approximately 195,000 VND/m², depending on quantity, site conditions, and delivery location.
Installation cost ranges from 300,000–400,000 VND/m² depending on subgrade complexity, seam density, and testing requirements.
Prices significantly below this are often signs of counterfeit or non-ASTM-standard products.
Checking these ensures that the purchased Fosroc HDPE 1.5mm membrane is genuine.
Regardless of material quality, poor welding will cause system failure. Choose contractors who:
A successful waterproofing system requires both high-quality material and high-quality installation.
Understanding the Fosroc HDPE 1.5mm waterproofing membrane helps investors make informed decisions for critical areas such as basements, reservoirs, technical pits, and wastewater-treatment zones. With high durability, strong mechanical performance, and exceptional chemical resistance, this material provides long-term value for all types of construction. When combined with proper installation, the waterproofing system will remain stable for decades, ensuring structural safety and reducing operational costs.
Yes. The material is safe, non-toxic, does not release chemicals, and has good UV resistance, making it suitable for large ornamental ponds.
Seams are commonly tested using air-pressure testing and vacuum testing to ensure complete sealing.
Yes. A geotextile underlay should be used to prevent puncture from sharp objects, especially in underground projects.
Depending on the area, installation usually progresses at 300–500 m² per day if the subgrade is smooth and weather is favorable.
Negligibly. HDPE has good thermal stability and does not shrink with temperature changes if properly protected.
No. Welding in wet conditions can cause seam defects, and moisture can enter membrane edges, reducing seal quality.
