*This project video and walkthrough provided by Keystone Retaining Walls and serves as a general explanation of how to build this project. Measurements and products may slightly vary when using RCP manufactured units. Please contact us if you have any questions.
Create a relaxing area where you can enjoy your yard or garden with this bench design from Keystone Retaining walls. Please consult with a RCP Block & Brick representative if you have any questions along the way.
Mark a 14' 2" x 36" rectangle bench location and excavate 12" deep. Compact the soil. Next, add 6" of granular base material. Compact and level base to avoid settling.
NOTE: If you are placing the bench on a patio or other concrete base, make sure surface is level then use masonry adhesive to secure the base course in place.
Note: This layout will be used for courses 1 & 3; Then only the column and back portions for courses 5 & 7
For the first course, place the units as illustrated above, centered on the prepared leveling pad. The first course will be 6" below finished grade. Level front-to-back and side-to-side making sure each block is level to each other. Use outdoor concrete adhesive to secure blocks where pins are not shown.
Note: This layout will be used for courses 2 & 4; Then only the column and back portions for course 6
Insert Interlocking pins into center pin holes on top of the first course of blocks and place two strips of outdoor concrete adhesive as shown in step 2. Add additional courses, alternating layouts as shown for each course in the diagram until the fourth course is completed.
Once the Course #4 is completed, use crushed stone materials to fill in center hole of bench, and level surrounding excavated area at the base of the bench.
Insert Interlocking pins into center pin holes on top of the fourth course of blocks and apply outdoor concrete adhesive to the back wall of your bench and the end columns.
Continue alternating course layouts as shown for courses 5 through 7 in the diagram, omitting the units on the front wall of the bench for these courses.
At this point the base of your bench should be taking shape. We just need to finish the columns and add the caps.
Note that course 8 and 9 are built on the columns only using the patterns shown above. Complete the column layers as shown above alternating each layer per column. Secure in place with outdoor concrete adhesive. Be sure to alternate block placement to avoid seams lining up in the final design.
Align the caps (as shown) so that you have a 1" over-hang. Note: You may need to cut the caps to get a tight fit. Once you have all the caps in place, lift one cap at a time and glue the cap using an outdoor concrete adhesive. Cut the caps to cover the filled center area to 6 in. deep. You will need to cut the caps to get a perfect fit lengthwise.