Is it more expensive to build corners than curves?

No, curves are typically recommended for aesthetic reasons. Unlike traditional formed cast in place, masonry walls, and most other square segmental walls, Verdura® walls are easy to curve and don’t add an additional expense. Corners can be built too.

When do I need a V-ditch on top of a Verdura® wall?

In general, whenever there is a slope proposed above the wall. Large volumes of water should not be allowed to drain over the top of the wall. Size and depth should be designed by the site civil engineer based on flow volumes and anticipated debris. Whenever possible, low points within the wall should be avoided. In cases where you have to have a low point, down drains and inlets should be over-designed to mitigate clogging.

Is a drainage lens behind the blocks required for Verdura® walls?

Typically, no. The Verdura® wall is a free draining open faced wall system. Closed faced systems need a drainage lens and drain behind the blocks to try to make sure water does not penetrate the face for aesthetic reasons and to prevent hydrostatic pressure. Most other systems are also sensitive to compaction behind the blocks and use gravel as an excuse for compaction. In cases where a drainage lens is required for a Verdura® wall (ie. Closed face configuration) we recommend a permeable material that can be compacted.