What is a potential issue with improperly installed roofing shingles?

Improperly installed roofing shingles can lead to a variety of issues, with reduced energy efficiency being a significant concern. When shingles are not aligned correctly, or if they are not sealed properly, it can create gaps or areas where airflow is not properly regulated. This can lead to heat escaping in colder months and increased heat absorption during warmer months, making it more difficult for heating and cooling systems to maintain comfortable indoor temperatures. As a result, energy costs can rise as homeowners try to compensate for these inefficiencies.

The other choices do not accurately reflect the outcomes of improper installation. Enhanced durability and improved insulation would typically result from proper installation practices. Similarly, a uniform appearance is a hallmark of well-installed shingles; improper installation can lead to a misaligned or uneven look, which is aesthetically unpleasing. Thus, reduced energy efficiency is the most relevant consequence of poorly installed roofing shingles.