The external protection of the buried walls depends partly on the destination of the subsoil they surround. The walls of premises where no trace of moisture is accepted are classified in 1st category. This is particularly the case of the walls of living rooms in the basement. As cinder block masonry is porous by definition, it is necessary to create a real impervious outer envelope and not to be satisfied with only a bituminous coating, if applied well it is. A waterproofing coating will be carefully spread on this wall before proceeding, once dry, to a coating with a bituminized finish.
- Garden hose
- Mason Rule
- Protective gloves
- Professional protection equipment
1. Check that the wall of the wall to be treated does not have unfilled joints (vertical mainly in thin joints) and seal with a fine mortar, those likely to create a significant rupture of sealing.
2. A cinderblock wall, especially if it is intended to be covered with embankments, does not always have perfect flatness. Correct and roughen the wrinkles (accentuated reliefs of a wall plan) in order to work on a wall as flat as possible.
3. Before manual installation or splashing, clean all traces of oil or mud and dust. Then pre-humidify the wall (the day before), especially for breeze blocks.
4. To achieve complete protection of the wall intended to be buried, a waterproofing coating is first applied to the previously moistened face. It can be projected with the lance (professionals) or troweled in traditional mode.
5. The waterproofing coating, whatever its mode of application, is then erected to the rule to compose a regular protective layer. The plaster body should have a thickness of 10 to 20 mm.
6. Tilt and smooth the surface in continuity of the application by proceeding by reduced surfaces. Finishing can be done during the open time of the product.
7. Let the coating dry for 48 hours always on a 20° temperature basis. Then apply a fluid waterproofing brush or roller in 2 crossed layers. Note that in a very humid environment the creation of a drainage system before the backfilling, can only be advantageous.
(photos / visuals: © Parexlanko, except special mention)
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