How does burlap react to water and moisture?

Jute has a special relationship with water and moisture. The fibers are naturally hygroscopic - they readily absorb water. When exposed to moisture, jute fibers can absorb up to 230% of their own weight in water. This makes jute very suitable for applications where you want to temporarily regulate moisture.

When jute gets wet, the fibers swell and become temporarily softer and more pliable. You notice this by the change in texture and weight. After drying, the fibers largely return to their original state, although repeated exposure to moisture can weaken the structure over time.

With prolonged exposure to moisture, jute breaks down naturally. Microorganisms in the soil begin to break down the natural fibers, eventually leading to complete composting. This degradability is an important advantage for temporary applications in the GWW sector, where post-use disposal is often complicated and expensive.

Can jute be used in outdoor environments?

Yes, you can certainly use jute outdoors, but its suitability depends on the specific application and how long it is exposed to weather conditions. For temporary applications, such as erosion control on slopes or as burlap ground cloth for temporary roads, burlap works very well and provides a durable alternative to man-made materials.

With prolonged exposure to rain, UV radiation and temperature fluctuations, jute will degrade more quickly. This is an advantage for projects precisely where you are looking for the temporary function of jute, such as erosion control on slopes. The material slows erosion in the important initial phase, then breaks down naturally as vegetation takes over the protective function.

Compared to man-made materials, jute has a shorter lifespan in outdoor conditions. While polypropylene products will remain intact for years, untreated burlap will usually remain functional for several months to a year, depending on the weather and depending on whether the burlap fabric has been treated or not. For permanent outdoor applications, man-made alternatives are usually more practical, unless you are specifically looking for natural degradability.

Case studies: jute in wet conditions

A great example of jute in wet environments can be found in bank structures along waterways. A project in Amsterdam successfully used jute structures as part of nature-friendly banks. The jute acted as temporary reinforcement while vegetation developed. Over time, the jute naturally broke down without having to be removed.

In stopping erosion on slopes and embankments, jute has proven effective even with regular rainfall. The material slows erosion and keeps the soil stable until vegetation has developed sufficiently to take over this function. A project near Kinderdijk successfully used jute in combination with coir materials to reinforce steep walls along a bicycle route.

An important factor in the success of burlap in wet conditions is proper installation. You must secure the material correctly to prevent it from drifting or sagging during heavy rain. In addition, the quality of the jute material plays a major role - heavier varieties with a higher fiber concentration perform better in wet conditions than lighter varieties.

Durability aspects of jute when exposed to rain

The environmental benefits of jute become especially clear when compared to artificial alternatives in wet conditions. While artificial materials remain intact and must eventually be disposed of as waste, jute turns into soil nutrients after its functional life. This fits perfectly with circular principles in the GWW sector.

The production of jute has much lower CO₂ emissions than man-made materials. In fact, growing jute absorbs CO₂ from the atmosphere. Moreover, the decomposition of jute does not require industrial processes; it occurs naturally by soil organisms, further reducing the overall environmental impact.

Tests by independent institutes such as KIWA have shown that jute is completely safe for the environment, even during the decomposition process in wet conditions. No harmful substances are released, making jute particularly suitable for applications in ecologically sensitive areas such as nature restoration projects and water management.

Frequently asked questions about jute and water resistance

How long does jute last in rainy conditions?
With prolonged humidity, jute can indeed show mold growth. This is part of the natural degradation process. In applications where this is undesirable, you can apply antifungal treatments that are still biodegradable.

How does jute dry after exposure to rain?
For permanent applications in continuously wet environments, untreated jute is not the best choice. For such applications, we at TEFAB offer treated jute, specific solutions that extend the functional life or we may recommend alternative materials better suited to your specific project.

As a natural, biobased material, jute offers numerous opportunities in the civil engineering sector, especially for temporary applications where sustainability is paramount. The way jute reacts to water is both a challenge and an advantage, depending on your specific project requirements. At TEFAB, we are happy to help you choose the right jute varieties and application methods for your GWW projects, focusing on sustainable, biobased solutions that contribute to circular construction practices.