Home Inspection State Practice Exam

As a lintel over doors and windows in a masonry wall rusts, what may it cause at the tops of openings?

1. Separation

2. Cracks

3. Discoloration

4. Warping

The correct answer is: Cracks

When a lintel over doors and windows in a masonry wall rusts, the corrosion can cause significant expansion within the material. This expansion applies stress to the surrounding masonry, particularly at the tops of the openings where the lintel is located. Over time, this stress can lead to the formation of cracks in the masonry above the opening. Cracking is a direct consequence of the physical changes that occur as the rust expands the lintel. As the masonry cannot easily accommodate the expanding forces, it eventually fractures which can compromise both the structural integrity and aesthetic appearance of the wall. This is a common issue in older buildings where steel lintels are used in masonry construction. Rust and corrosion are serious concerns because, if not addressed, they can lead to more severe structural problems, including potential failure of the lintel itself.