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Last modified: 2020-05-19 | Approximate reading time 3 mins
Brick is a durable material. However, brick joints have a tendency to deteriorate much more rapidly. Over time, the mortar that is used to make the joints will start chipping, thus affecting the water tightness of the surface.
It is very important to fix damaged joints before you start facing bigger problems like water ingress.
First step: diagnosing the problem. If the mortar joints are highly damaged, they will have to be redone completely. Any superficial repairs would only push the problem back to a later date. However, if the cracks are still relatively small, you can fix the situation rapidly by applying a small coat of mortar.
To repair mortar joints, you will need the following tools and equipment :
Mortar creates a lot of dust and dirt, therefore it is recommended that you wear safety glasses and gloves when handling the product. If you have breathing problems, you should also wear a mask.
Before you get on with the work, make sure that the weather conditions are ideal. If completing the task during the winter, you will have to employ a protective measure to ensure that the mortar does not freeze before having completed its drying period.
In the summer, high temperatures could also cause problems with the process, as the mortar will have a tendency to dry too quickly. To avoid new cracks forming, the surface must be protected from both the sun and the heat.
During the drying period, the surface should also be protected from wind and rain.
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Before you start applying the new mortar, you’ll have to meticulously remove any trace of damaged mortar. When you start digging with the hammer and the chisel, be very careful not to damage the bricks. According to the Heritage and Quality renovation guide, if you see that more than half the mortar is crumbling, it’s better to remove the bricks in order to redo the full mortar bed.
Using a brush and a small amount of water, try to remove all remaining residue in the empty joints. Afterwards, wet the section on which you will be working. Mix the mortar with a trowel until smooth.
Still using the trowel, gradually spread several thin coats of mortar; letting the product dry between each coat (the drying process is very quick). Keep going until you’ve filled the joint.
Once the mortar has dried and is hard enough, you can create a nice finish for the joint by adding a bit of mortar on the surface and pressing down with your trowel. Damaged brick walls can lead to severe problems.
Brick joints hold an important role in ensuring the wall’s water tightness and they also help the wall keep its structure. If the damage is too extensive, the wall could collapse. That’s why it’s so important to repair brick joints when they show signs of wear and tear.
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