Need a Professional Installer?

---

Installation Guidelines: Cambridge Pyzique^® Wall Systems

Retaining Walls

Excavate a trench approximately 14 inches wide. Refer to chart below for trench depth.

Wall Height	Trench Depth
3'	6"
2'	4"
1'	2"

Compact bottom until fairly level. If you are building on unlevel areas you can prepare step-downs in increments of the 4" thickness of the Pyzique stone. Add 1" of coarse C-33 sand into the bottom of the trench.

The First Course

Place the first layer of Pyzique stones smooth side down on the prepared foundation. Use a carpenter's level in all directions and use a string line to verify straightness. Serpentine walls may be built too. Be certain the base course is level and stones lay flat. For micro leveling and to help the stones lay flat, keep a bag of sand handy and use small handfuls to level and stabilize the first course.

Setback Alignments

Set the center side alignment groove directly above the backmost 5/8" set back groove of the stones in the next lower layer. This visual alignment is all that is required for each successive layer of stones. To prevent any granular fill or soil from passing through the system, a landscaping fabric can be placed behind the wall units. A flexible drain tube is a competent way to assure drainage from behind your wall. As successive layers are set, stagger the face seams of the stones for interlocking wall strength.

Top Cap Row

The normal bottom of each Pyzique stone is smooth. Place the bottom up for your cap row. To avoid vandalism, you may want to use a paver grade glue to secure the cap layer to the layer below it. Place a dab of glue on each of the stones that the cap layer's stone will set on. Stones must be clean and dry for adhesive to bond.

Making A Square Corner

Pyzique can make square corners by splitting one stone from front to back through the middle. Use paver adhesive at each "X" (see illustration). Alternate Row "A" with Row "B" allowing for setback in both directions.

Note: Retaining walls are not built straight up unless expensive geogrid materials and structural deadmen are utilized. Walls must have a horizontal force equal to or greater than the horizontal force of the soil being retained, otherwise the wall will fail. Pyzique is designed with a 5/8" set back for each row (5/8" horizontal tilt per 4" of wall height) to impose a horizontal force against the retained soil.

Tri-Face Option

Simply place a stone chisel in the corner tri-face groove of the face that will be exposed. One hit with the hammer on the chisel at each corner will create the tri-face option.

Free Standing Stone Fences, Patio Barriers & Sitting Walls

Pyzique's patented double split face allows you to build stone fences, patio barriers and sitting walls with both sides showing a beautiful stone finish.

These projects are built straight up using the zero set back groove. Footings must be highly compacted aggregate or solid reinforced concrete. The use of paver adhesive between the upper layers is necessary. Stone fences must be built plumb.

Use construction techniques on these projects similar to those used building a retaining wall. Start your project with at least one layer of stones below the grade. Drain water away from the footing using a drain tile similar to retaining walls. Be certain that stones are level in all directions. Stagger seams of Pyzique stones in these projects and glue the top 2 or 3 layers together for barrier or fence integrity.

Serpentine barriers or stone fences will have greater strength than straight walls. Pyzique stones may need to be cut with a paver chopper or masonry wet saw to achieve specific radii.

For detailed installation instructions on Pyzique Tiered Retaining Walls, Tree Rings, Steps, Lawn, Garden and Paver Borders, visit Your Authorized Cambridge Distributor.