Roofing

HDPE (High-Density Polyethylene) waterproofing is a key solution for protecting structures from water damage, particularly in environments exposed to groundwater and moisture. Le Fong, a leading waterproofing contractor in Singapore, uses HDPE due to its strong resistance to chemicals and its ability to form a durable bond with concrete, making it ideal for applications such as basements and foundations.

Advantages of HDPE Waterproofing

HDPE waterproofing membranes are known for their robust performance. They provide a high level of water, vapor, and gas protection, making them suitable for a range of structures from residential to commercial buildings. Here’s a detailed technical examination of HDPE’s advantages in waterproofing applications:

  1. Chemical Stability:
    • HDPE is resistant to a pH range from 1 to 14, allowing it to withstand exposure to highly acidic or alkaline environments without degradation.
  2. Impermeability:
    • Water Vapor Transmission Rate (WVTR) for HDPE membranes is typically less than 0.1 g/m²·24hr, indicating an excellent barrier against moisture penetration.
  3. Mechanical Strength:
    • Tensile Strength: HDPE can exhibit tensile strengths from 12 to 34 MPa (megapascals), depending on the formulation and manufacturing process.
    • Puncture Resistance: Typically, HDPE membranes can withstand forces up to 550 N (newtons) without failure.
    • Tear Resistance: HDPE membranes demonstrate a tear resistance of approximately 100 N (newtons).
  4. UV Resistance:
    • HDPE membranes formulated with UV stabilisers can maintain structural integrity and physical properties after exposure to UV radiation for periods extending up to 20,000 hours based on accelerated weathering tests.
  5. Flexibility and Installation Ease:
    • HDPE remains flexible within a temperature range of -60°C to +60°C, making it versatile for various climatic conditions.
    • Seam Strength: Welded seams typically achieve 80% to 90% of the tensile strength of the original material, ensuring robust joins.
  6. Longevity and Durability:
    • The expected service life of HDPE waterproofing membranes in normal environmental conditions is over 50 years, reducing the need for frequent replacement.
  7. Environmental Resistance:
    • Resistance to microbial growth: HDPE is not a nutrient source for mould or bacteria, significantly reducing the risk of biodegradation.
  8. Low Thermal Conductivity:
    • The thermal conductivity of HDPE typically ranges from 0.42 to 0.51 W/m·K, offering modest insulation properties alongside its waterproofing capabilities.

HDPE Membrane Specifications and Application

HDPE Waterproofing Material

The HDPE membranes applied by Le Fong are typically pre-applied with a pressure-sensitive adhesive that securely bonds to concrete without the need for welding or the use of additional protective materials.

This simplifies the installation process and reduces the potential for errors, which can be crucial in time-sensitive construction projects. The membranes are also environmentally friendly, contributing to sustainable construction practices.

HDPE Membrane Waterproofing Types

SikaProof® SK3000 -High performance, pre-applied HDPE waterproofing membrane for sub-structures and confined sites- 20M Length x1.2M Width x1.2mm Thickness, SGBC Singapore Green Building product.

Sika® BituSeal-1500 SA Smooth Top -a self-adhesive polymer modified bituminous sheet membrane reinforced with a cross-laminated high strength HDPE film. 15M Length x1M Width x1.5mm Thickness

SikaShield® SK2000 – Self adhesive waterproofing membrane – 20M Length x1M Width x1.5mm Thickness, SGBC Singapore Green Building proudct

Le Fong’s Expertise and Service Excellence

Le Fong’s commitment to quality is reflected in their comprehensive approach to each project, ensuring that all aspects of waterproofing—from membrane installation to joint sealing—are executed to the highest standards. Their service includes detailed site assessment, custom solution planning, and ongoing support to address any potential waterproofing issues. The use of advanced materials like HDPE ensures long-term durability and protection, enhancing the overall value of the structures they work on.

For anyone considering waterproofing solutions, particularly with HDPE membranes, Le Fong offers a reliable and effective service, backed by a wealth of experience and a strong focus on customer satisfaction and technical excellence.

Contact us today to install HDPE waterproofing for your office/building.

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