5 Must-Check Metrics When Buying TPO Waterproof Membranes

TPO waterproofing membrane is the "invisible armor" of building waterproofing, but 30% of the products on the market have false parameters. One developer saved costs by buying low-grade TPO, only to spend $160,000 fixing leaks post-construction.

This guide teaches you to inspect TPO like a pro, ensuring leak-free performance for decades.

Metric 1: Thickness & Uniformity

3-Step Verification

1. Tool: Buy a 0.01mm precision digital caliper (~$30).

2. Measure: Test 5 random points (avoid edges within 10cm).

3. Pass Criteria: Average ≥1.2mm, max. variation ≤0.1mm.

Metric 2: Tensile Strength

Understanding the Numbers

• Longitudinal Strength: ≥500N/cm (equivalent to lifting 5 cars).

• Transverse Strength: ≥400N/cm to prevent seam splitting.

Metric 3: Weather Resistance

3 Killer Tests

1. UV Chamber: Simulate 5-year sun exposure (no cracks after 5000hrs).

2. Cold Bend Test: Fold at -40℃ without cracking (Dawn passes -50℃).

3. Heat Shrinkage: ≤1% shrinkage at 130℃ (low-grade products up to 3%).

Metric 4: Eco-Certifications

• China Ecolabel: Guarantees zero heavy metal emissions. 

• LEED Points: Certified TPO contributes to LEED MRc2 credit.

Metric 5: Welding Performance

4-Step Inspection

1. Visual Check: Smooth weld seams without bubbles.

2. Peel Test: Use a blade to cut the weld, and the manual peeling length is less than 2cm to pass.

3. Air Pressure Test: 0.2MPa for 2 minutes, no leaks.

4. Thermal Imaging: Check temperature uniformity (free equipment rental).

Dawn TPO Material for Waterproofing Membrane

Dawn Polymer's TPO waterproof membrane material can be applied to the preparation of (GB 27789-2011) H, L, P and other waterproof membranes, that is, it not only can be applied to roofs and other exposed waterproofing, but also can be used for non-exposed waterproofing such as tunnels and culverts. 

If you want to purchase TPO materials, contact us now to get a quote!