You have detected a
crack
in the wall of your house.
Before taking action, make sure that this crack does not reveal a structural problem and shows no signs of seriousness.
If the crack seems important to you, contact a craftsman who will give you his opinion on the procedure to follow.
Once these precautions have been taken, here is how to repair it, using an exterior wall repair mortar.
The technique is different for a cinder block wall.
Leaving a crack can cause water to seep into your wall.
How to identify a crack?
As with cracks on interior walls, you will first need to identify the type of crack before sealing it.
Because it is not excluded that it is simply the wear and tear of your wall covering.
To do this, take a triangular scraper and clear the groove of any debris.
Then dust the crack with a brush, or even a vacuum cleaner.
You should then see the ends of the crack appear.
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To note
If in doubt, do not hesitate to call a professional to assess the extent of the damage.
How to repair a cracked concrete wall?
If the crack is located on a concrete wall, you can use a fiber-reinforced repair mortar for exterior walls or a suitable filler.
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After wetting the crack, apply the mixture with a spray gun or a putty knife, making sure to completely fill the crack.
The gesture must be repeated horizontally.
Then smooth everything with a knife to remove the excess coating.
In order to make the repair invisible, you will have to renovate your facade.
How
to repair a crack on an exterior plaster wall?
In the case of a crack on a plaster wall, which tends to crumble, it is best to apply a primer with a brush in the crack, after having opened and cleaned it .
Read alsoHow to choose your wall paint?
Once the fixative is dry, you can proceed with the filling using an acrylic sealant if you plan to paint the wall afterwards, or a silicone sealant if not.
For both methods, the putty must completely fill the crack and the excess material must be removed at the end.
How to fill the crack in a concrete block wall?
In the case of a crack appearing on the breeze block, a silicone mortar, which is applied with a gun, will make it possible to seal the crack and prevent infiltration.
Easy to apply, it is available in most DIY stores.
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How to repair a crack in a brick wall?
As for a concrete wall, you can fill the crack in a brick wall either with:
a mortar
an elastomeric silicone sealant
In both cases, it will be necessary to fill the crack well and remove the excess at the end of the maneuver.
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Attention
It is important to choose the color of the mortar closest to that of your brick joints so that the repair is discreet.
