Draining underground structures is an integral part of the lining systems. An effective and reliable drainage system prevents water penetration and development of hydrostatic pressure.

Multilayer drainage mats form effective and rapid vertical/horizontal channels for transporting surplus water.

Vertical drainage:

Drainage alongside underground structural walls, basements, parking garages, tunnels, as well as drainage alongside retaining walls.

Horizontal drainage:

Under paved surfaces / soil layers, atop underground basements, green roofs, etc.

Drainage and lining of posts:

Variable width drainage strips are installed between piles to serve as a drain protected from cast concrete and permitting effective drainage of pile walls.