Although it's counterintuitive that a breathable fabric could shed rainfall, this is accomplished through capillary action, gravity, and the properties of cohesion and surface tension between water molecules. Simply stated, at the point that the ComposTex cover becomes saturated with rainfall, surface tension and cohesion cause this water to follow the path of least resistance and 'wick' from fiber to fiber inside the cover and down the gravitational gradient created by the sloped sides of the covered pile. Eventually, this water reaches the bottom edge of the cover, where it drips out onto the ground.
Whether used on a short term basis or for continuous protection through an entire compost cycle, ComposTex will protect piles from excess rainfall, thereby ensuring optimum aerobic compost conditions and preventing the saturated/anaerobic conditions that produce unpleasant odors, nutrient-laden leachate, and wet compost that increases costs associated with screening, bagging, and transportation.
Since 1994 ComposTex has been used on over five hundred compost facilities around the world to ensure optimum moisture content in active, curing and/or finished compost, thereby improving product quality, increasing operating efficiencies, and reducing soluble nutrient losses. ComposTex is also used to protect piles from windblown weed seeds, reduce moisture loss from sun and wind in dry climates or conditions, and to limit access to piles from flies and scavenging animals.