Where gypsum board panels meet at outside corners, these corners should be protected with:

Where gypsum board panels meet at outside corners, these corners should be protected with:

• A. tape and joint compound
• B. corner bead
• C. 1/2 J channel
• D. 5/8 J channel

Answer: (B)

Protecting outside corners with a corner bead is essential because it creates a hard, square edge that resists impact and keeps the corner true over time. You fasten the bead to the corner, then apply joint compound over and around it to finish flush with the wall. Doing tape and joint compound alone wouldn’t provide a durable edge and would be prone to cracking or denting since there’s no rigid edge to resist damage. J-channel profiles (the 1/2" and 5/8" types) are used for other edge finishes and don’t create the proper outside-corner protection needed for gypsum board. So, corner bead is the correct solution.

Protecting outside corners with a corner bead is essential because it creates a hard, square edge that resists impact and keeps the corner true over time. You fasten the bead to the corner, then apply joint compound over and around it to finish flush with the wall. Doing tape and joint compound alone wouldn’t provide a durable edge and would be prone to cracking or denting since there’s no rigid edge to resist damage. J-channel profiles (the 1/2" and 5/8" types) are used for other edge finishes and don’t create the proper outside-corner protection needed for gypsum board. So, corner bead is the correct solution.