Add Drainage Aggregate and Compaction

block on top of it getting the right drainage material behind the wall is a critical element but easy to get wrong a lot of people use pea rock thinking that it's drainage material but it's small in nature and rounded we always use 3/4 clear angular stone it locks in place as you're laying it down and resists movement a center repair can be tricky you have two ends of a retaining wall that are left in place so you've got to make the concrete blocks meet perfectly in the middle alex is going to find out that sometimes that doesn't always happen [Music] I can fit although it fits it doesn't sit quite level and Alex finds out why the entire wall is designed to allow water to weep evenly through it the key to that happening is making sure that that drainage aggregate that gets put in place the drainage zones gets light hand compaction only the rock gets put in place and compacted in small lifts so it's a process that repeats over and over again