Geotextile wrapped sheet drains offer a cost effective option to the conventional use of aggregate to form a vertical or horizontal drainage and waterproof membrane on foundation walls and other underground structures. Drain mats are well suited for managing sub-surface water around building foundations and protecting waterproof membranes. The dimple structure transports large volumes of water while its high compressive strength resists high loads from infill and formwork.
Our sheet drains consists of a high quality, abrasion resistant, non-woven filter fabric bonded to an HDPE dimpled core. This filter fabric prevents soil or sand particles blocking the drain mat, creates an air gap for reliable ventilation and reduces hydrostatic pressure behind walls by allowing high volumes of filtered water to pass into the drainage core and be discharged away from the site.
Our lightweight and flexible cuspated sheet drains come in a range of sizes from 1.1m x 30mm. For larger applications sheet drains can be supplied in widths up to 2.2 metres with or without a filter fabric.
Applications
- Retaining walls
- Basement walls and foundations
- Reducing hydrostatic pressure behind vertical structures
- Protecting waterproofing membranes
- Drainage for landscaping on rooftops, podium decks and planter boxes
- Bridge abutments
Installation
Sheet drains are installed with the geotextile facing the soil and the dimples up against the wall. The dimples along the edges of the sheets are easily pressed together on site, to cover a wider area.
| Core Properties | Units | 10 Single | 20 Single | 18 Double | Geotextile Properties | |
|---|---|---|---|---|---|---|
| Compression (ASTM-1621) | kPa | 10 | 400 | 75 | Flow | >200 l/m2/s |
| Thickness | mm | CBR | >1500 N | |||
| Flow | l/min/m width | 223 | 480 | 450 | EOS | <0.12 mm |
| Roll length | m | 30 | 30 | 30 | Grab | >500 N |
| Roll width | m | 1.1/2.2 | 1.1 | |||
| Roll weight | kg | 18 | 30 | 26 | ||