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Installation Guidelines

Geotextile Installation

Geotextile Installation.php

The geotextile should be placed on the prepared slope or other surface to be protected. All folds and wrinkles should be removed from the geotextile before the block is placed on top of it.

Place the geotextile so that there is sufficient overlap to seal the seams for intrusion of water and ensure minimal stretch of the geotextile material. Upstream strips of material must overlap the downstream strips and upslope strips overlap down-slope strips. The amount of overlap (X) is usually specified by the engineering firm and may be a minimum of 3 feet for wet installations and a minimum of 1.5 feet for dry installations.

The upstream strips of material must overlap the downstream strips and upslope strips overlap down-slope strips. (See Diagram 4)


There should be no voids or airspace between the subgrade and the geotextile so intimate contact can be maintained with the two surfaces. Once the geotextile is placed, the work area should not be disturbed. This is necessary to avoid any contact loss between the ACBs and the geotextile and the geotextile and the subgrade. (See Diagram 5)


Spreader Bar | Subgrade Preparation | Geotextile Installation | Loading and Unloading Cabled Mattresses
Placement of ACBs | Cabling Anchoring and Crimping | Grouting | Bibliography