20 mm, Laying with adhesive

Traditional laying with adhesive on concrete screeds is ideal for outdoor areas used by vehicles, such as the entrances to garages, car parks and yards.

The key benefits are:

  • The system’s excellent resistance to dynamic and concentrated loads.
  • Option for use of the same material in pedestrian and vehicle areas.
  • Suitability for both residential and public or retail locations.


Instructions for laying with adhesive – Non-waterproofed outdoor pavings
Preparing the substrate

For paving areas for use by vehicles:

  • Create a substrate of compacted hard core followed by a layer of gravel, with the addition of lean concrete if wished – Loose stone foundation
  • Add a levelling layer of concrete of suitable thickness. A gradient of between 1.25 and 2.5% is recommended, depending on the tile type and size, and the width and direction of the joints
  • Laying surface – Reinforcing screed of suitable depth, of industrial type. Screed 8-10 cm thick with welded steel reinforcing grid laid about halfway through the layer

 

Instructions for laying with adhesive – Waterproofed outdoor pavings
Preparing the substrate

This type of paving is designed to prevent rainwater from reaching the room underneath

  • A bitumen waterproofing membrane and a barrier material (polyethylene membrane) are placed on top of the levelling layer. A drainage layer is created on top of the barrier membrane
  • Laying surface – Reinforcing screed of suitable depth, of industrial type. Screed 8-10 cm thick with welded steel reinforcing grid laid about halfway through the layer

Laying the slabs

Install the slabs using an outdoor adhesive, following the specific instructions for the adhesive used (C2S2 under EN 12004). To ensure that the laying material is evenly compacted, the double coating method should be used (this method is necessary for pavings exposed to high levels of stress).

Joints

Slabs must be laid with open joints of variable width of no less than 5 mm. Class 2 cement grouting materials must be used (CG2 under EN 13888).

Structural Joints

  • Expansion joints are compulsory: they must be at least 5 mm wide (except for structural joints) and must reach up to the top of the paving surface.
  • Seismic joints must form a square or rectangular grid across the surface, with ratio between the sides not exceeding 1.5 m. Grid sizes are normally between 3×3 m and 4×2.5 m.
  • Perimeter joints must be provided at points where the paving meets walls, steps, raised areas, pillars etc., where compressible material (e.g. polystyrene) must be added.

Initial cleaning

Cleaning after laying is of fundamental importance for all subsequent procedures and to allow correct maintenance of the paving.