Among the factors that distinguish a quality self-locking screed, if a permeable pavement is desired, is the ability to drain storm water without unduly limiting the other technical capabilities of the pavement.

The increase in demands for a draining or filtering pavement, especially from many public agencies, stems from the need to counteract the consequences of increasingly extreme weather, which alternates between periods of low rainfall and sudden storms and flooding. 

The AMP Consortium meets this demand with many solutions, and depending on the context of application, can propose filtering or draining pavements: the former are able to let water pass through the small voids between the various components of the screed, unlike draining products, which are not permeable, but are designed with very wide joints, into which water is able to drain. The choice between a filtering or draining product is based on both technical and aesthetic criteria. For technical criteria, one considers the intended use, so what flow rate the floor will face and how often it will be subjected to high loads. The more it will be stressed, the more the direction will be toward a draining floor, thus with fewer voids, greater thickness, and therefore greater strength. In cases where the weight and/or stresses are low, then filter flooring, which is available in multiformats, with a greater amount of not only monochromatic but also mixcolor, can also be considered. However, filter pavements are not to be associated with the concept of a delicate product, as they can be subjected to stresses of up to medium weight carriageability such as small trucks and vans.