How long should you wait before setting the second course on the base?

How long should you wait before setting the second course on the base?

• A. 2 Hours
• B. No wait time
• C. 1 day
• D. 1 hour

Answer: (D)

The idea is to let the base and bedding have a little time to settle so the next course seats true. After you place the first course, waiting about one hour gives the bedding sand or mortar a chance to begin to stiffen and the first course to settle into place. This helps prevent movement or misalignment when you set the second course on top. If you don’t wait, the weight of the next course can shift the first one and create gaps. Waiting too long isn’t necessary for most landscape builds and can make bonding harder later. So about an hour is a practical, balanced interval.

The idea is to let the base and bedding have a little time to settle so the next course seats true. After you place the first course, waiting about one hour gives the bedding sand or mortar a chance to begin to stiffen and the first course to settle into place. This helps prevent movement or misalignment when you set the second course on top. If you don’t wait, the weight of the next course can shift the first one and create gaps. Waiting too long isn’t necessary for most landscape builds and can make bonding harder later. So about an hour is a practical, balanced interval.