Expert advises – How to arrange a terrace well?

MAKING A TERRACE

The most important thing while making a terrace is a well-prepared design.  Relevant plans will facilitate work and eliminate errors. The design should include such information as: size of slabs, type of surface, shape, dimensions, terrace downhill angle, expansion joints, pattern of arrangement, and type and material used for edges of a terrace.

 

The terrace may be arranged in two ways depending on the fact, how the rainwaters are discharged. Drainage of the terrace in the first instance is carried out under slabs – joints are not filled or they are filled with material that is permeable. Other drainage method consists in discharging rainwaters over slabs – here the joints are filled with material that is not permeable. Paving slabs may be laid dry or wet.

1.

DISCHARGE OF WATER UNDER THE SURFACE OF PAVING SLABS

If we decide that rainwaters are to be discharged under paving slabs, we may lay them in few ways:

  • use spacer disks, not adjustable (dry method) –lay slabs on a stable, waterproof surface, the angle of slabs will be adapted to the angle of the surface, which provides for water discharge
  • use spacer disks, adjustable (dry method) – lay slabs on a stable, waterproof surface; applied discs allow on perfect leveling of slabs.
  • use spacer disks, adjustable (dry method) – on the foundation made of concrete drainage
  • use plastic bags with mortar (wet method) – lay slabs on a stable, waterproof surface; plastic bags are placed in the corners of slabs, lay slabs on plastic bags and level them, then water the mortar through pouring water.

 

2.

SURFACE DISCHARGE OF WATER

If we decide that rainwaters are to be discharged on the surface, we may lay them in few ways:

  • laying on the foundation placed on the soil (dry method) – remove the layer of humus and make the foundation taking into account the load of a terrace and features of the soil, then lay paving slabs on the cement bed and joint them with a dry sand or lay them on blinding concrete and joint them with grout, which in turn fill in with aggregate.
  • Laying on the glue mortar (wet method) – glue slabs to a concrete panel using cement mortar (frost) or with a joint intended for terrace slabs.
  • When laying terrace slabs, regardless of the method, there must be kept min. 5 mm joints for length up to 500 mm and above 7 mm. Delivering expansion joints is of key importance between the surface of a terrace and a wall of a building and in case of making expansion joints for large terraces.