Wall cracks: 7 mistakes to avoid

Wall cracks: 7 mistakes to avoid

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Unsightly, the wall cracks indicate a problem with the construction or excess moisture. It is therefore perfectly useless to try to hide them without having determined their origin. The consequences can be fatal to the whole building. Here are some mistakes to avoid in case of wall cracks.

Error N ° 1: do not work on the cracks

A fine microcrack or crack, that is to say a width of less than two millimeters, must not escape repair. If the absence of gravity is proven, small repair works can be undertaken by the master of the place gifted with some notions of DIY.

Mistake # 2: just hiding a wall crack under a covering

Putting wallpaper on an unclogged crack amounts to hiding misery, but does not cure evil. A wall covering will not prevent cracking from increasing and the damage can be very serious. Similarly, a crack on an exterior wall should not be plugged with a simple plaster. It is imperative to proceed beforehand with a repair of the crack of facade in the rules of the art.

Mistake # 3: using an improper coating

Specialized stores sell products adapted to each type of crack. Laying an unsuitable plaster will not stop its progression. For example, a cracker is not satisfied with a silicone seal for microcracks.

Mistake # 4: neglecting humidity issues

Moisture can cause significant cracks, but also microcracks. Neglecting this humidity problem will inevitably lead to an aggravation of the cracking, even after clogging, and consequently significant expenses.

Error N ° 5: ignore the plaster witness

Using a plaster witness in the case of a crack not exceeding two millimeters in width makes it possible to verify the stability of the crack. To do this, apply a plasterboard perpendicular to the microcrack. Wait three to four months. If after this lapse of time the witness is intact, it means that the crack is stabilized. The filling can be carried out. However, if the plaster witness is split, it is imperative to turn to a specialist.

Mistake # 6: not cleaning up a crack

Before filling a microcrack or a fine crack, it is imperative to clean it up. Otherwise, the filling coating may not catch, and the repair work would have no effect in the medium term. Remediating a microcrack consists of smoothing all of its walls. In some cases, it may be necessary to use a triangular scraper to slightly dig the V-shaped crack before cleaning it up.

Mistake N ° 7: filling up a large crack or crack yourself

From two or three millimeters in width, the structural crack is considered large enough to involve a professional who must first determine the cause. He will look for a false balance, a construction defect, a movement or a subsidence of the ground, an excess of humidity and possible infiltrations: an unavoidable diagnosis. Our practical DIY videos