How long must wall anchors be left to set before applying insulation?

The correct choice specifies that wall anchors should be left to set for 24-48 hours before applying insulation. This timeframe is critical for ensuring that the anchors have adhered properly to the wall structure, providing the necessary support and stability for the insulation material. Allowing adequate time for the setting process helps prevent any movement or shifting of the anchors, which could compromise the effectiveness of the insulation installation.

While other options suggest time frames that may seem reasonable, they either underestimate the time needed for a thorough set or extend beyond what's necessary, which can delay the overall project without providing additional benefits. The 24-48 hour window balances efficiency with structural integrity, ensuring that when the insulation is eventually applied, it will be secured to a well-set anchor system. This careful attention to detail is important for the long-term performance of the insulation and the overall durability of the wall system.