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Taking Care of Your Brick Siding


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Brick siding can give a home a stately appearance, and for most homes, brick siding requires significantly less maintenance than wood siding. However this does NOT mean NO maintenance. Proper care for your brick requires routine cleaning, protection, and timely repairs.
 

Routine Cleaning


For general cleaning of your brick siding, you should use a mild detergent, a hose and a brush. Using a power washer will risk damaging your mortar and caulking, and if your brick is painted, power washing painted brick will likely cause the paint to peel or fade.

If lawn or garden sprinklers have left hard-water spots on your home’s brick exterior, these can be removed with an acid-based brick cleaner. If you decide to do-it-yourself, you will want to be very careful, follow all label directions, wear rubber gloves and eye protection, cover nearby plantings, and apply with a stiff-bristled nylon brush on an extension handle. And then be sure to rinse thoroughly when finished (see types, costs, and reviews of: brick cleaners; rubber gloves; eye protection).

If you have stains from vegetation that is growing near or on your brick siding, these can be removed with oxygen bleach or fungicide solutions (see types, costs, and reviews of oxygen bleaches). For best results, you should first clean the areas with a stiff-bristled broom to remove any loose material. And then apply the cleaning solution in dry weather so that the application has time to work before being diluted by the next rainfall.

If your bricks appear to have a white crystal-looking powder on them, you likely have "efflorescence" which is caused by moisture getting into your bricks and then the dissolved salts evaporating on the surface. Efflorescence can be removed with a stiff bristled broom (but don't use a wire brush, as it could dislodge the mortar between the bricks). However, if you don't remedy the source of the moisture (e.g., sealing the brick), the efflorescence will continue to come back (helpful accessory: brick sealants).

Mildew on your bricks is caused by the presence of moisture on the surface. A good cleaner for mold and mildew is a 50/50 mix of oxygen bleach and water. Be sure to use protection for your eyes, hands and skin, cover nearby plantings, and apply with a stiff-bristled nylon brush on an extension handle (helpful accessory: brick brushes). And be sure to rinse thoroughly when done.

Rust stains on brick can be caused by ironwork adjacent to your siding, or by particles of ironstone in the mortar leeching out. Rust stains on the brick can usually be cleaned by hard scrubbing with a damp stiff-bristled brush. But to keep the problem from coming back, if the source of the rust is ironwork, then it will need to be cleaned primed and re-sealed. And if it is due to ironstone in the mortar, then the affected mortar areas will need to be repaired in a process called "re-pointing."

Algae typically grows on brick siding in areas that receive little sunlight and hold moisture for long periods of time. Cleaning can be done with a mixture of 1 gallon of water and 1 cup of oxygen bleach. Be sure to use protection for your eyes, hands and skin, and cover nearby plantings, and apply with a stiff-bristled nylon brush on an extension handle. And be sure to rinse thoroughly when done.
 

Protecting


Applying a silane-based or siloxane-based sealer to your brick will help prevent moisture-related problems such as efflorescence and spalling. Your brick should be thoroughly cleaned before applying a sealer.

If you have brick sills, ensure that they properly sealed and there are no cracks in the mortar that could allow moisture to seep behind the brick below the sill.

Key to protecting your brick is to routinely inspecting it. In particular, you will want to look for: signs of water penetrations; that all "weep" holes at the bottoms of the walls are open; that flashing is in place; no cracks forming in mortar; no bulges in the walls; no signs of spalling (face of brick flaking off); no vines creeping up; that caulking is in place and good condition; and there no signs of efflorescence, mildew, or other stains.

Vines and ivy look beautiful on brick walls, but their roots can work their way into loose mortar, and cause it to loosen it further. In addition, they can climb onto nearby woodwork, and bring insects and moisture which will cause rotting and other problems.
 

Repairing / Repointing


If sections of your brick wall have begun to bow outward, it is likely that moisture has gotten behind the wall and caused the mortar to deteriorate around the wall ties that hold the brick onto the side walls.

If the mortar between your bricks has begun to crack and deteriorate, then it will need to be repaired in a process called "re-pointing." Cracks are usually caused by structural movement, construction defects, temperature and moisture extremes, mortar content problems and/or erosion, and tree roots growing too close to foundations.

Spalling is when the face of the bricks begins to crack off. This is typically caused by moisture getting into the brick, freezing, and then 1/8 to 1/4 inch of the surface separates and falls off. Affected bricks will need to be replaced (or sometimes they can be turned around), and the source of the moisture needs to be remedied.
 

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