About ComposTex Covers

Poultry Manure (Chile)

Hickory Regional Compost Site (NC)

Boerson Farms (WI)

Black Bear Composting (VA)

Champlain Valley Compost Co. (VT)

BioSoil (Israel)

City of Appleton (WI)

Mixed Materials (CA)

Mixed Materials (OR)

Biosolids (SC)

Heavn's Best Compost (LA)

compostexWet compostexDry


Having the lowest prices and over 20 years of personal experience with this product, CV Compost is the original and largest worldwide distributor of ComposTex compost covers.

ComposTex compost cover (also known as "compost fleece") is a completely breathable, non-woven fabric (or geotextile membrane) made of 100% UV-resistant polypropylene that completely sheds rainfall from covered windrows1 - while remaining usable for at least 4 to 15-plus years2.

Since 1994 ComposTex has been used on thousands of compost projects around the world. The most common use of ComposTex is to protect active, curing and finished compost piles from excess rainfall, thereby preventing excess moisture conditions, which in-turn helps ensure optimal aerobic microbial activity, reduces unpleasant odors associated with saturated/anaerobic conditions, and reduces soluble nutrient losses. And by ensuring compost doesn't become too wet and heavy, ComposTex also reduces the costs associated with screening, bagging, and transportation. In some cases, ComposTex is also used to protect piles from windblown weed seeds or to limit access to flies and scavenging animals.

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.

We also have a few customers in very dry climates who use ComposTex to protect piles from the drying effects of sun and wind. However, since there's only a relatively small reduction in moisture loss when using the covers for this purpose and the durability of the fabric is significantly reduced due to the increased UV-light exposure, we recommend first trying other more effective methods to reduce moisture loss such as:

1. Ensuring the mixture of ingredients within the pile start out with a moisture content of between 65 to 70% (by weight) which would be the amount of water contained in a VERY damp sponge. This will ensure that the pile ingredients start turning into compost as quickly as possible, thereby improving their water-holding properties and reducing the rate of moisture loss.

2. Turning less frequently, which is discussed in more detail in the article "In Defense of the Pile Less-Turned, A Case for Low-input Composting".

3. Building larger piles to reduce the surface-to-volume ratio, which minimizes the surface area relative to the volume of material inside the pile.

1 In extreme rainfall events (i.e. in excess of 1 or 2 inches/hour) the water shedding ability of ComposTex could be compromised.
2 The durability of ComposTex will vary depending on climate and use conditions.