Humber/Ontario Real Estate Course 4 Exam Practice

What issue may roof trusses face during winter months in residential construction?

1. Varying size and configurations.

2. Structural decomposition.

3. Truss uplift.

4. Increased water absorption.

5. Damage from fallen leaves.

The correct answer is: Truss uplift.

The correct answer, truss uplift, refers to a specific phenomenon that can occur in roof trusses during winter months, particularly when there are significant temperature differences between the interior and exterior of a home. In cold weather, the warm, humid air inside a home rises and can create pressure that pushes the bottom chords of the trusses upward, causing a separation between the trusses and the ceiling below. This effect is primarily due to changes in humidity and temperature conditions, leading to visual gaps at the wall/ceiling junction and potential structural concerns if not properly addressed. Understanding this issue is crucial for builders and homeowners, as it can affect the integrity of both the roof structure and the finished appearance of the interior. Addressing truss uplift typically involves proper design considerations, including the use of tension ties or other structural elements to counteract the uplift forces. Varying size and configurations, structural decomposition, increased water absorption, and damage from fallen leaves, while they may present issues in different contexts of roofing, do not specifically relate to the winter conditions affecting trusses as truss uplift does. Each of those terms may involve general concerns about roof integrity or maintenance, but they are not typically linked directly to the pattern of behavior exhibited by roof trusses during