We refer to the material used for the base within and behind the block as wall rock.
Retaining wall drainage rock size.
The sizes available are 5mm 10mm 20mm and 40 50mm.
This tends to lead to less restriction and greater water flow capacity.
Unfortunately as the size increases it becomes harder to shovel.
For a stacked block retaining wall that s no higher than four feet a trench filled with three inches of crushed rock will help keep the wall from shifting and settling.
A retaining wall is intended to hold back soil when there is a drastic change in elevation.
Retaining walls are a seemingly simple enhancement to any landscaping project.
However nearly 80 of all residential retaining walls fail at one point or another because of poor drainage.
Good drainage and compaction will add to the quality and performance of your finished wall.
Proper drainage for a rock retaining wall.
Larger sized rock is also on hand or can be sourced.
After going to all the trouble of building a retaining wall the last thing you need is for it to collapse because of mud and water damage at its base.
Crushed or smooth stone well graded compactable aggregate ranging in size from 0 25 in.
Basics of retaining wall design 10 editionth a design guide for earth retaining structures contents at a glance.
This common size is also used for many landscaping projects.
Larger rock with its irregular nature has larger air spaces or voids when packed into a drainage system.
3 4 there are two options at this size clean and dga.
Ensure your retaining wall stands strong for years to come by using the correct type of stones for your project and by choosing a design that works well for your soil and lawn type.
Just give us a call at 763 568 7251 or submit a message through our quick quote system.
Our experts are happy to provide solutions for your retaining wall needs.
3 4 dga or q p is used for road base asphalt and as a base for concrete pavers.
3 4 clean is used for drainage behind walls and is also used as fill and for drainage projects such as french drains.