CSLB Class B General Contractor's License Practice Exam

When should caulking be applied in building construction?

1. Before painting

2. During framing

3. To seal joints at the end of construction

4. Only after inspection

The correct answer is: To seal joints at the end of construction

Caulking should be applied to seal joints at the end of construction because this process ensures that any gaps between building materials are properly sealed to prevent moisture intrusion, air leakage, and pest infiltration. By applying caulking at the conclusion of the construction phase, contractors can address any discrepancies that may have emerged during the building process, ensuring a more watertight and energy-efficient structure. Applying caulking earlier in the construction process, such as during framing or before painting, may not provide the same level of effectiveness, as there may be additional changes to the building components that could create new gaps. Furthermore, waiting until after inspection could leave structures vulnerable to issues that could have been easily mitigated if caulking was applied as part of the finishing work. Therefore, sealing all joints after major construction is key to ensuring the integrity and longevity of the building.