How to Choose High-Quality Waterproofing Materials

Choosing the Right Waterproofing Material: Key Considerations for Performance, Application, and Long-Term Cost
Selecting an appropriate waterproofing material involves evaluating product performance, construction quality, and long-term maintenance costs. Here are three common challenges:
🔹 Issue 1: Too Many Options—Which Material to Choose?
Whether you're planning to DIY waterproof your roof, balcony, or interior/exterior walls, the market is flooded with countless brands and product specifications. This variety can be overwhelming, making it difficult to determine which product is right for your needs.
🔹 Issue 2: Lack of Transparency—How Can You Tell if It’s High Quality?
Home renovation is a long-term investment, and naturally, you hope the waterproofing layer can last 20–30 years. However, most waterproofing contractors only offer 1–3 year warranties, and when problems arise, they often fall outside of the warranty period.
🔹 Issue 3: Underestimating Maintenance Costs—How to Avoid Long-Term Surprises?
Waterproof layers are not permanent. Over time, they deteriorate due to aging and environmental conditions. Unfortunately, many people focus only on initial installation costs and warranty terms, overlooking expected lifespan and future repair expenses.

✅ Solution: Use Waterproofing Materials That Comply with CNS 8644
The CNS 8644 national standard provides a benchmark for quality waterproofing materials. When selecting products or working with contractors, ask specifically for materials that fully meet this standard, not just partially. Also request test reports to verify long-term durability and stability.
⚠️ Why Does CNS 8644 Matter?

Stringent Requirements: CNS 8644 sets a high bar—so high that most waterproofing products on the market don’t fully comply.
- In a recent market survey of 10 suppliers:
  • 6 had no compliant products
  • 3 had products that partially met the standard
  • Only 1 had a product that fully complied
Cost Pressure: Even if manufacturers have the technology to meet the standard, producing high-quality materials means higher production costs. Many choose to produce cheaper, lower-quality products just to win more orders—this has unfortunately become the industry norm.
Warranty Culture: Contractors often aim to cover just the 1–3 year warranty period. If the waterproofing survives that long, it’s deemed acceptable—even if it’s unlikely to last 20 years.

🔍 How to Respond as a Buyer

Prioritize materials that meet CNS 8644 standards for proven performance.
Ask for lab test results to verify long-term durability.
Be cautious of cut-rate contractors using substandard materials—they often lead to higher future repair costs.

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This content is based on international academic literature, internal lab data, and real-world case studies. Results may vary due to proprietary formulas or application techniques used by individual suppliers, which are not covered in this summary.

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Link to TPUCO products & PU Knowledge:
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