Door casing should be installed how?

The recommended method for installing door casing involves nailing it to the trimmer stud and then caulking it to the wall. This approach provides several advantages.

Nailing the casing to the trimmer stud ensures that it is securely attached to a solid structure, which helps in maintaining the alignment and integrity of the casing over time. Trimmer studs are specifically installed to support door frames and provide a stable surface for attaching the casing.

Adding caulk between the casing and the wall not only enhances the aesthetic appeal by covering any gaps or imperfections but also serves to seal the edges, preventing drafts and moisture from entering the wall cavity. This method also allows for some flexibility in alignment, as caulk can help accommodate minor variations in wall surfaces or the casing itself.

In contrast, options like gluing the casing to the wall may result in a weaker bond and could lead to issues over time, especially with any contraction or expansion in the materials. Screwing directly into the wall does not provide the same level of stability as fastening to the trimmer stud, and hanging from the top is not a conventional method and may compromise the casing's support and appearance. Therefore, securing the casing to the trimmer stud with nails and caulking to the wall