For butt-joint glazing, what is generally the preferred maximum joint width?

In butt-joint glazing, the preferred maximum joint width is generally 1/2 inch. This width allows for sufficient sealant without compromising the structural integrity of the glazing system. A joint that is too wide can lead to potential issues such as inadequate adhesion, increased likelihood of water infiltration, and reduced thermal performance.

Maintaining a maximum joint width of 1/2 inch also ensures that the system can accommodate movement due to thermal expansion and contraction, as well as other stresses that may occur in a building's lifecycle. In glazing applications, especially those subjected to varying temperatures and environmental conditions, it is crucial that joints are designed to function effectively within these parameters.

Wider joints, such as those approaching 3/4 inch or even 1 inch, can present challenges related to sealant performance and may require special considerations for movement and alignment, potentially making them less favorable for standard applications. Therefore, adhering to the 1/2 inch maximum ensures a balance between flexibility and performance in butt-joint glazing scenarios.