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Protection against upwelling by capillarity

The rising water in the walls by capillarity are one of the scourges of the constructions of the last fifty years. The most commonly used economic base material, the breeze block, has proven to be a real sponge and facilitates this phenomenon by its porosity. But noble materials such as calcareous stones, can also be at the origin of the phenomenon if, at the time of their rise, no cut of capillarity has been realized as the rules of the art and the various DTU pertaining to the use of these materials.

Necessary material

  • Brush
  • Trowel
  • Wheelbarrow
  • Bucket
  • Shovel
  • protective gloves

Steps

  1. Preparation
  2. Production

Preparation

Adjuvant water repellent mortars

Adjuvant water repellent mortars

1. The realization of an insulating wall of a wall is obtained by incorporating in the mortar employed a concentrated adjuvant to be diluted in the mixing water to obtain a waterproof and water-repellent sole.

Introduction of the additive into the mixing water

Introduction of the additive into the mixing water

2. After having dosed the water-repellent product according to the manufacturer's recommendations (it exists in a dose for a bag of cement) and mixing it with the mixing water, proceed according to the rules of the art.

Mixing with concrete mixer with water-repellent water

Mixing with concrete mixer with water-repellent water

3. You can mechanically mix larger quantities of mortar. All you need to do is to dose the product according to the amount of materials and water required for the capacity of the concrete mixer used.

Production

Application of the waterproof flashing so insulating

Application of the waterproof flashing so insulating

4. Although it is advisable to make this sealing sole 15 cm above the finished floor, it can be done at level or even under a floor of ground floor. This sole must have a minimum thickness of 2 cm to guarantee its function of cutting capillary rises

Passage of an asphalt coating

Passage of an asphalt coating

5. The external side protection of the foundations is also part of the systems to be used to prevent humidity from rising in the walls. It involves applying a bituminous waterproofing coating whose essential function will be to isolate by a double layer, the wall of the masonry that will be in contact with the backfill materials.

Wall complement of protection against lifts

Wall complement of protection against lifts

6. On the support intended to be buried and of which the overhanging or friable parts have been eliminated and the traces of oil, mud or dust cleaned, pass a first layer of this bituminous product with, either a strong brush, a trowel or trowel. Wait for the first application to dry completely (2 hours at 20°) to pass the second in a crossed layer.

(photos / visuals: © Parexlanko, except special mention)

On the same topic

  • DIY tips
    • How to properly treat the humidity of a wall?
    • Repairing face stones
    • Redo the joints of an old facade
    • Reconstitute cornices and stone frames
    • Manual application of a monolayer facade coating
    • Create moldings, cornices and bands
    • Protection against the humidity of the elevations in buried parts (habitable rooms)
    • Glued installation of zinc gutters
    • Making a flashing on ridge
    • External Thermal Insulation: Insulating and Coating
    • Exterior Thermal Insulation: substrate preparation
  • Questions answers
    • With which system to treat capillaries?
    • How to treat upwellings in the basement?
    • How to create a "drop of water" on a wall that does not have one?
    • What to do in case of absence of band of arase?
    • How to treat humidity in a house under which a spring flows?
  • products
    • Treatment of interior walls against humidity by Rubson
    • Waterproofing: Waterproof membrane Bostik

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