Waterproofing terraces: effective methods for lasting protection

Terraces are continuously exposed to the elements and, if not properly waterproofed, can suffer structural damage from water infiltration. An effective terrace waterproofing system is critical to ensure protection of the structure and prevent problems such as moisture, mold, and concrete deterioration.

Why is it Important to Waterproof a Terrace?

Rainwater can seep into micro-cracks in concrete and, over time, compromise the integrity of the entire structure. Some of the main problems caused by lack of proper waterproofing are:‍

  • Infiltration into the rooms below, with damage to walls and ceilings.
  • Formation of cracks and fissures, which worsen with temperature changes.
  • Degradation of concrete, with detachment of coating and corrosion of reinforcement.
  • Presence of mold and moisture, affecting the healthiness of indoor environments.

Waterproofing Systems for Terraces

Depending on the needs and characteristics of the structure, different waterproofing technologies can be opted for:

1. Waterproofing with Crystallizing Additives.

The use of crystallizing admixtures for concrete, such as Drymix and Drymix Ultra, is an innovative and effective solution for waterproofing a terrace already in the construction phase. These admixtures react with the water in the concrete, forming insoluble crystals that capillary seal the structure and prevent the entry of moisture.

Advantages:

  • Permanent protection from moisture
  • Improving the chemical and mechanical strength of concrete
  • Self-sealing of microcracks up to 0.5 mm

2. Waterproofing with Liquid or Cementitious Membranes.

Liquid or cementitious waterproofing membranes are flexible solutions, ideal for existing terraces or those subject to structural movement.

Types of waterproofing membranes:

  • Polyurethane membranes: elastic, UV-resistant and wear-resistant
  • Acrylic membranes: easy to apply and suitable for walkable surfaces
  • Two-component cementitious membranes: highly adherent and resistant to negative pressures

3. Waterproofing with Bituminous Sheaths

Bituminous membranes are one of the most widely used traditional methods of waterproofing terraces. They are composed of layers of polymer-modified bitumen applied hot or cold to the surface.

Advantages of bituminous sheaths:

  • High mechanical strength
  • Good durability
  • Suitable for large surfaces

How to Choose the Best Solution?

The choice of the most suitable waterproofing technology depends on several factors:

  • Type of terrace (walkable or non-walkable)
  • Status of the structure (new or in need of renovation)
  • Climatic conditions in the area
  • Budget available

To ensure a lasting result, it is essential to rely on experienced professionals and use high-quality materials such as those offered by Drykos, a leader in the waterproofing industry.

DRYBOXSYSTEM® for concrete waterproofing.

Protecting a terrace from infiltration is essential to preserve the structure over time and reduce maintenance costs. The use of crystallizing additives, waterproofing membranes or bituminous sheathing provides an effective and long-lasting result, improving the safety and comfort of the rooms below.

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