Aggregate drains are sometimes referred to as french drains. Washed in soils can create a real problem for these systems and they eventually clog. The introduction of a drainage fabric around the aggregate can prevent in-situ soils from being washed into and clogging the drain.
US 120NW is a nonwoven lightweight drainage fabric that will prevent soil fines from entering the drainage system, extending drain life and increasing performance.
Please click on the "Lightweight Nonwoven Geotextiles" link below for more information.
A second geosynthetic option for french drains is US SWD (site water drainage) strip drains. They completely replace the traditional french drain consisting of drainage fabric, aggregate and pipe. US SWD consists of two parts: a geotextile drainage fabric and a molded plastic core or "dimple board". These pre-fabricated drains have an 80% open area compared to the 1%-3% open area for 4" perforated pipe and have a flow capacity of 30 gal/min/lf.
US Fabrics Composite Drains can also lower installation costs because they install 50% faster than traditional french drains, decrease the amount of soils removed from the jobsite and eliminate the hassles associated with gravel.
Please click on the links below for an SWD product sheet or to visit the Composite Drain product section of our website.