How to Repair Fireplace Mortar and Grout?

If you have a fireplace, it is important to regularly inspect the mortar and grout in your fireplace. You may need to clean and repair it in order to keep the unit running properly. While this is a job that can be handled by the average homeowner, you should consult a professional to do it right. 

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There are several types of mortar that are used in masonry. These include cement, silica sand, and lime. Mortar can be mixed with a mortar mixer or by hand. The mortar you use should be fire-resistant. This is especially true if you plan to use your fireplace as a source of heat. It also should be surface coated to prevent it from sticking to the soot on the brick. 

The best way to repair your fireplace is to clean it first. This will remove soot and debris. Once your chimney has been cleaned, it is time to replace the old mortar. Before doing this, you will need to remove the old mortar from the bricks. A wire brush is a good choice for this task. 

Next, you will need to spray water into the joints to prepare them for the new mortar. After this, you will need to use a tuck-point trowel to smooth the surface of the mortar. You will also need to clean the joints with a shop vacuum. 

Finally, you will need to add fresh mortar to the joints. You will need to choose either type N or type S mortar. Type N is more durable than type S, but it will require a longer drying time. On the other hand, type S is more forgiving if the mortar dries out. 

When you are done, you should let the mortar cure for a couple of days. After it has cured, you should apply a sealant to the mortar. Also, you should check on the mortar from time to time to make sure there are no leaks. 

Another good way to fix a cracked mortar joint is to use refractory heat-resistant caulk. This is similar to refractory fireplace mortar, but is not as suited for the job. Refractory caulk is made from a mix of refractory materials and can be applied with a caulk gun. However, you will want to check with the manufacturer about the best method to apply the caulk to the joint. 

If you want to do it yourself, you can purchase a nozzle for refractory mortar, a grinder with a special tuck-point blade, and a putty knife. These items can be purchased at home improvement or hardware stores. They can help you get the job done in a more efficient manner. 

Remember to let the mortar set for at least an hour before using it. This will help the mortar to cure more effectively. In addition, you should use a small moist sponge to smooth out any mortar holes. You can also try a pressure washer. 

Luckily, most of the major repair tasks are fairly easy. But it is important to know how to do them.