Installation for UltraTimber Landscaping
- Adhesive(for more than one teir high)
- Mortar Mix or Expanding Foam
PreparationHave all underground utilities located. Select radius or square profile as exposed surface.
Select the siteDig a trench approximately 12" wide and 3" deep below the location of the wall check to make sure trench bottom is level.
Cut UltraTimbersUsing a saw, cut the UltraTimber as needed to fit the wall. (For tips on cutting UltraTimber see the How To on cutting UltraTimber) If the length of your wall is more than one UltraTimber long, stagger the position of the joints between the courses so they do not align vertically. This will give extra strength to your design.
Laying Out UltraTimbersLay the first course of UltraTimbers in the trench and check that they are level. If necessary, use a mallet to tap the UltraTimber into the trench. Remove any small rocks or debris that might cause the level to be off.
Joining UltraTimbersUsing a 1" spade bit, drill two holes in each UltraTimber from the top side. Start by drilling throught the top and continue drilling through the second layer inside the timber. See Figure 3. Position holes so the next layer of UltraTimbers covers the holes. Cut four sections of galvanized mesh hardware cloth. in 3" X 6" rectangles. Bend galvanized mesh hardware sections length wise in half and curve to fit around the corner where each chamber meets. See figure 4 and 5.
Joining Corners Using Expanding FoamCut ends of UltraTimbers at desired angle. (For tip on cutting UltraTimbers see the How To on cutting UltraTimber). Place cut edges together, fill trench with dirt around UltraTimbers, and firm in place. This makes a form that will hold the corner in place while expanding foam sets. Following directions on the epanding foam can, fill the chambers in UltraTimber through the pre-drilled holes. See figure 7. After the foam expands and dries, it may be necessary to cut any excess foam away from the UltraTimbers. End to End: Follow instructions for joining corners using expanding foam and apply to any end to end situation.
Joining Corners using mortar mixCut ends of UltraTimber at desired angle. (for tips on cutting UltraTimber see the How To on cutting UltraTimbers.) Insert crumpled newspaper, or like material, inside each chamber leaving approximately 4" of empty space at the end of each chamber.(See Figure 8) Place cut edges together, fill trench with dirt around UltraTimbers, and firm in place. this will hold the corner in place while mortar sets.(See Figure 6) Mix mortar to a consistency that flows through a soft tip grout bag. Fill the chambers in UltraTimber through the pre-drilled holes, and wipe and excess morrtar with a damp sponge or cloth. Allow mortar to set before additional layers are added. End to End: Follow instructions for joining corners using mortar and apply to any end to end situations.
Additional tiers, up to four highLay two beads of construction adhesive along grooves the length of UltraTimbers.(See FIgure 10) For best results, we suggest the use of PL 400. Lay the next course of UltraTimbers on top of the construction adhesive, nesting the locking tab and channel together. Support: when additional UltraTimbers are put in place, a light geo fabric can be inserted on top of construction adhesive prior to putting next layer in place. This allows UltraTimber to be tied into backfill.(See figure 11)
Optional: Finishing the ends of the UltraTimbersOption 1: Create a 90 degree corner(see figure 6) and extend UltraTimbers back into slope. Option 2: Fill and square ends with expanding foam and shave off smooth when set.
BackfillBackfill behind wall so 1" to 2" of the wall will extend above the fill. Tamp down the fill to remove any any air pockets and prevent shifting of the soil. Use gentle force when backfilling as not to shift the wall before the fiill has settled completely.
Filing any sharp edgesUsing a file, gently remove any sharp or rough edges.
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