Title: (Optional) Describe mortarless concrete masonry retaining wall systems.
Course: Masonry III (17008-III) > Section: Performing Additional Masonry Tasks

Description should include the following specifications:

- Trench must have a 6-inch gravel base.
- First course must be perfectly level, length and width.
- Each corresponding course must lap back by the unit standards.
- The back of the wall should be fortified with a minimum of 12 inches of gravel.
- A plastic/vinyl membrane should be installed in accordance with manufacturer specifications.
- Wall should be capped with solid units provided, using exterior construction adhesive.

Process/Skill Questions:

- What are the advantages of mortarless concrete masonry retaining walls over mortared retaining walls?
- What is the purpose of a retaining wall?