Waterproofing terraces


impermeabilizar terrazas

We often wonder what is the most efficient way to waterproof terraces and what would be the best system for it. Winter, rain and ice are often symptoms of an increased risk of leaks which, if left unresolved, can cause damage to the building structure over time. These types of problems usually arise from a worn or poorly installed waterproofing. Next, we will see some solutions that are used to avoid or solve these waterproofing problems on terrace, balcony and exterior floors.

What to consider before waterproofing a terrace or flat roof

To waterproof terraces, the first thing to analyze is the area where the intervention will take place:

  • Evaluate the state of conservation of the pavement and the substrate
  • Check the stratified section of the structure
  • Make sure the slope of the ground is adequate
  • Check that there are no fractures or separation between the different layers, although we emphasize that our WATER-STOP sheet is recommended to be installed on repaired pavement or subfloor, although it can bridge small cracks that arise after installation. In this regard, we also highlight the G-FLEX , since thanks to its load distribution technology it can be installed on cracks of up to 3 mm without losing any type of strength or efficiency.

What is the most suitable solution for waterproofing terraces?

The best solution to waterproof your terrace or balcony may vary according to their conditions, you can choose the best solution by evaluating the factors discussed in the previous point. It must be taken into account that it can be waterproofed on top of the tiles, but the most effective solution would be to remove the tiles and waterproof the underlying layer, avoiding increasing the maximum installation height.

Waterproofing solutions for terraces without removing the tile

If the floor is in good condition, without cracks or tents, liquid waterproofing is a good solution to waterproof terraces without having to remove the tile surface. It is easy to use and can be applied quickly with rollers or brushes to the entire surface without leaving gaps, creating a thickness of only a few millimeters. This method is not entirely recommended , since the useful life and adaptation will be much less than with waterproof geotextile sheets.

Waterproofing solutions for terraces under the pavement

If the pavement is damaged or is not suitable, it is necessary to remove it completely and intervene in the layer underneath, looking for a solution. Evac’s composite geotextile sheets could be a perfect solution for waterproofing below-pavement decks efficiently. In addition, the useful life of these sheets is much longer than that of its competitors such as asphalt fabric. We also have to take into account that with EVAC type sheets an extra flexibility is obtained, improving, facilitating and assisting in the installation.

How to waterproof terraces and flat roofs with waterproof sheets

In the market there are not many feasible solutions in which to use waterproof sheets for waterproofing the terrace or flat walkable roof. At Estil Guru we offer the Water-Stop geotextile sheet as the main option, which is perfectly adapted to the different needs of each situation.If the waterproof layer under the substrate is not damaged, you can implement a cleaner and faster solution, such as a rolled membrane made of polyethylene. To use this type of waterproofing, we suggest using G-Flex, a membrane composed of a polyethylene base laminated with a non-woven fabric at the bottom. With a total thickness of only 3 mm, G-Flex not only reinforces the impermeability of the substrate without substantially influencing the interior of the pavement, but also compensates for structural stress, manages the humidity that rises through the installation and provides a additional resistance to loads.

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