DELTA® TERRAXX in drivable roof decks

A high-density polyethylene dimpled sheet which acts as a surface drainage layer in vertical and horizontal applications.

Features:

• Comprises a layer of polypropylene compression-resistant permanent filtration geotextile, laminated to a silver polyethylene (HDPE) drainage sheet with 9 mm height dimples.

• The vertical drainage system combines high compressive strength with excellent drainage properties.

• The integrated geotextile mat filters out suspended soil particles and ensures constant water drain-off through the air gap created by the dimple texturing.

• The silver surface gives the sheet low emissivity as well as enhancing its heat transition resistance.

• When applied to perimeter insulation boards, the dimpled sheet provides the necessary insulation from contact with the surrounding soil thanks to its plane reverse face.

• Suitable for vertical gas (methane and Radon) drainage when combined with a classical filtration gravel layer underneath the floor slab. The top apertures of the drainage sheet should be covered with a layer of gravel to enable the gas to escape into the ambient air without difficulty.