Q.I'm lucky and have lots of medium to larger rock on my lot that can be easily harvested. I want to build a stackable rock retaining wall that will be about 3 feet tall and hold back that amount of ...

Q. Can you tell me how to build a retaining wall? Are retaining wall blocks a good choice? What critical things do I need to know so that I don't have a collapse or other failure in the years to come?

Q: Tim, I read a column on your website about rock retaining walls. I’m having a hard time believing you can build a lasting wall and not use mortar between the stones. I’d love to just build a wall ...