As I have mentioned in my previous articles, bricks and their construction are usually considered to be very fierce and quite resistant. However, extreme weather can still have a negative effect over time. One of these evidences is the Great Wall. Some part of the wall was built by bricks, but they have been eroded for centuries. Then what can we do to help bricks stay longer, elegant and resistant? Fortunately, waterproofing can solve at least soften this problem. As a matter of fact, both a building with brick veneer and a solid brick structure can benefit from waterproofing.
 Bricks would be eroded |
 Bricks with waterproofing |
Most sealants are made with siloxane, which chemically bonds to the material and prevents water from passing through it. This type of brick waterproofing sealant is clear, so it does not change the appearance of the building. In fact, rather than staying on the surface of the structure, brick sealant penetrates the material. It will need to be reapplied to older brick structures about every four to seven years, and newer buildings approximately every five to ten years.
 Brick sealant |
 Brick sealant used, before and afer |
A benefit of brick sealant is that, while it does not allow liquid moisture to seep through to the material, it does allow vapor to escape from the bricks. Considering that all buildings contain some moisture within the materials that needs to be let out, this is convenient. Brick waterproofing is also helpful in resisting the accumulation of dirt, so keeping a building looking as new and clean as possible can be increased by using brick sealant.
One major issue that brick sealing can help avoid is efflorescence, which is white staining often observed on brick construction. This is caused by the buildup of salts in the brick. The moisture inside each brick begins to dissolve the salt, and when the water evaporates, the salts are visible on the surface. Avoiding the white staining that occurs as a result is possible with brick waterproofing.
Spalling is another potential problem with brick construction. It occurs when the brick begins to flake due to water freezing within it. This causes expansion and eventual flaking. Sealants made with silicone, epoxy, polyester, or acrylic materials typically do not prevent spalling, while the kind made of siloxane does.
 protected by waterproofing |
 Protected by waterproofing |
Although brick waterproofing products usually last years, the sealant will likely have to be reapplied several times throughout the life of the building. Sticking to the suggestions of when to apply brick sealant depending on the age of the building is a good idea, but those in extreme climates will likely need to reapply more often. Just like any other waterproofed product, when water no longer beads upon contact with the brick, it is time to reseal.
Tags: bricks, waterproofing
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