I always talk about how important the base of the arena is. If you install the base incorrectly, you could spend large amounts of money trying to fix it later down the road. One layer in the base that is often overlooked is the geotextile fabric. There are two different types of geotextile fabric: woven and non-woven fabric.
Woven geotextile fabric is a bit cheaper of an option that is created by actually weaving individual threads on a loom. Woven geotextile is strong, and pretty stiff. It is primarily used for steepened slopes, retaining walls, wind erosion, or for cushion. The downfalls of woven geotextile fabric are that it can be easily opened by angular aggregate and does not drain well.
Non-woven fabric is created when the material is bonded with chemicals or with heat to create the consistent surface. This fabric is created for ideal filtration and drainage. It is mostly used for erosion control, separating layers, or drainage fabric. Non-woven fabric is a bit more expensive than woven, and is slightly thinner but can be made at different thicknesses or can be reinforced.
When explaining the ideal base that you need for your arena, we always recommend 2-3 inches of large aggregate stone, a layer of geotextile fabric to separate the stone layers, 2-3 inches of crushed stone on top of the fabric, and your footing directly on top of your compacted crushed stone. The geotextile fabric that should be used is a non-woven fabric. This allows for all water to be able to move freely through your base, so that you don’t have any type of water buildup in your base, leading to water buildup in your footing. The reason we also recommend non-woven is because it is stronger than the woven fabric in that the large aggregate stones can’t break through. This ensures that you don’t have stones migrating up into your footing.
We love to help people who are planning their arenas. If you have any questions about what we recommend for your base construction, please feel free to give us a call!