FLEXOTOPTM ECO SUB-BASES 4/2020
FLEXOTOPTM ECO may be installed on both bound and unbound sub-bases. However, specific
requirements apply in both cases to avoid drainage problems or permanent deformation.
The requirements for the various sub-base types that may be used are detailed below.
Generally speaking, the whole area of the base must be 100% self-draining and the base
compressed to prevent any further settlement. The base consists of a compacted structural
layer (min 35 MPa) with crushed stones 0 – 32 mm in 200 mm thickness and crushed stones of
0 – 4 mm fraction in 20 mm. This structural layer is laid on compacted soil (min 25 MPa). (The
depth depends on area where sub base is made, in area with ground water and severe frost
subbase must be thicker)
The following materials are unsuitable and would not be fit for purpose: slag, clay, r FLEXOTOPTM ECO SUB-BASES Concrete and Asphalt Installing FLEXOTOPTM ECO o We fully recommend finishing FLEXOBASE on the 45°