Rebar within a stem wall will rust and cause horizontal cracking

Horizontal cracking in a stem wall due to rusted and expanding repair can be a sign of structural damage and should be inspected by a professional.

Stem walls are an important component of a building's foundation, providing support and stability to the structure above. When the steel reinforcing bars (rebar) in the stem wall rust and expand, it can cause cracking in the concrete.

Horizontal cracking in the stem wall typically indicates that there is significant pressure or movement in the wall. This can be caused by a variety of factors, including soil movement, water damage, or structural damage.

If the cracking is due to rusted and expanding repair, it may be a result of improper repair techniques or materials. Over time, the rusted rebar can cause the concrete to crack and shift, compromising the integrity of the structure.

It is important to have a professional inspect the stem wall and determine the cause of the cracking. Depending on the severity of the damage, repairs may be necessary to prevent further structural damage or collapse. This may involve removing and replacing the damaged concrete, reinforcing the wall with additional steel, or other repair techniques.

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