Which of the following is a common issue with improperly installed corner strips?

Improper installation of corner strips can lead to drafts due to gaps created where the strips do not sit flush against the wall or adjoining surfaces. Corner strips are designed to create a seamless transition between walls and provide a level surface for finishing. When not installed correctly, these gaps allow air to pass through, compromising insulation and leading to drafts. This is not only an issue for comfort but also affects energy efficiency as conditioned air escapes or infiltrates through these openings.

While other options such as peeling paint, cracking, and unaligned edges can be related to various installation issues, drafts specifically highlight the functional problem of a sealed environment being compromised due to inadequate sealing of the corners, which is particularly crucial for maintaining climate control in a building.