Built for the North: How Our Composite Plastic Survives Extreme Freeze-Thaw Cycles

In Canada, the #1 enemy of an outdoor deck isn't the sun—it’s water absorption combined with our brutal winters. When moisture penetrates a board, it freezes, expands, and eventually causes the material to crack or delaminate. This is the destructive "freeze-thaw cycle."

To prove the superior durability of our composite plastic, we subjected our boards to rigorous laboratory testing, simulating years of extreme weather exposure in just a few hours.

Laboratory Results: Near-Total Impermeability

We use the ASTM D1037 standard, which involves a 5-hour total immersion in boiling water. This extreme test simulates prolonged exposure in a saturated environment. The results for Écoplast are industry-leading:

• Average Absorption Rate: Only 1.10%.

• High Density: A structural density of 1.16 g/cm³ that creates a literal shield against the elements.

For comparison, pressure-treated wood can absorb up to 30% water. Even some low-end composite products exceed 3% to 5% absorption, leaving them vulnerable to swelling and structural failure.

Why Does a 1.1% Absorption Rate Matter for You?

1. Zero Swelling, Zero Cracking

Because water cannot penetrate the core of the board, the risks of swelling or cracking during the spring thaw are virtually eliminated. Your deck maintains its dimensions and its "like-new" appearance, year after day.

2. Natural Mold and Mildew Resistance

Without internal moisture, fungi and mold have no place to grow. Unlike wood or porous composites, Écoplast remains a clean, healthy material without the need for annual chemical sealants.

3. Protection Through the Entire Mass

Many competitors use a thin plastic "cap" that can scratch or peel over time. Écoplast boards are waterproof throughout their entire core. Even a deep scratch won't compromise the water resistance of your deck.

Engineered for the Canadian Climate

By choosing a composite plastic designed and tested right here in Canada, you are investing in peace of mind. Our 2026 technical results confirm that our high-heat fusion process provides the highest durability on the market to face our local winters.