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In large outdoor works using AQUAZERO slabs, it is necessary to leave an expansion joint every 7 metres of width of length, to allow for the absorption of structure movements. Expansion joints must also be provided in the following cases: in correspondence with the expansion joints of the building; in correspondence with the space between the floors of the building; whenever different materials are used in the structure of the building. An expansion joint is simply an interruption in the continuity of the metal framework, of AQUAZERO slabs and of their lining.

The expansion joint must be 12.5 mm wide, except in cases in which there are already calculated structural joints.

The expansion joint may be closed using PVC joint covers, easily found in the market.

Sturdy, convenient, versatile, resistant to atmospheric agents, easy to cut and mould.