Florida Home Inspector Practice Test 2025 – Comprehensive Exam Prep

Question: 1 / 400

What causes truss uplift?

Overloading of structural members

Inconsistent temperature levels

A differential in humidity levels within an attic

Truss uplift occurs primarily due to differences in humidity levels within the attic space compared to the living areas below. When warm, moisture-laden air rises into the attic, it can condense against the cooler surfaces of the trusses, particularly during colder months. This condensation can lead to an increase in moisture content in the wood of the trusses. As wood absorbs moisture, it expands, and the differential expansion can cause the trusses to lift.

Understanding truss uplift is essential for home inspectors, as it can lead to various structural issues over time, including cracks in ceilings and walls, if not addressed properly. Maintaining consistent humidity levels and ensuring proper ventilation in the attic can help mitigate this effect.

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Improper installation of trusses

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