INSTALLING YOUR DRYSTONE RETAINING WALL

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1. Mark out and dig trench

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2. Fill trench with GAP 7

STEP 1. Site preparation and excavation

Dig out the area behind where your wall will go to allow for drainage and back fill. Then dig a trench 500mm wide and 200mm deep along the line of your walls planned base.

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3. Level and compact GAP 7

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4. Lay first layer

STEP 2. Prepare a level base

Compact the soil in the base of your trench. Then fill trench with GAP 7 or similar and compact evenly. Check with a string line and spirit level to ensure your wall will be built on a solid, level base.

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5. Lay drain coil and drainage aggregate

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6. Lay second layer, continue laying and check levels

STEP 3. Install the first layer

You must ensure the first layer is perfectly level. Place the drys tone blocks onto the base and tap with rubber mallet. As you lay the first layer – check that it is level from side to side and back to back. Check the back of the first layer with string line. On a sloping site, step the trench in 100mm increments to ensure blocks remain level. Always start laying your wall from the lowest point and work uphill.

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7. Check levels

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8. Backfill with drainage aggregate and soil as you go

STEP 4. Drainage

If your wall is going to be 3 layers or more high, then place a “punched” drainage coil behind the first layer of blocks. Extend the coil away from the wall and connect to the nearest silt trap. Cover the coil with drainage aggregate.

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9. Place capping stones on and glue down if you wish

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10. Enjoy the beautiful finished result!

STEP 5. Stacking and Backfilling

Brush the first course clean and place the second course in a stretcher bond pattern. Ensure the nibs of the upper block engages with the back of the bottom block to prevent movement. As each layer is finished, place drainage aggregate and backfill behind the wall and compact the back fill every 2 courses. Continue until finished height is achieved. Then place caps on the wall to finish off. (These can be glued down with construction adhesive if you desire)

INSTALLING YOUR DRYSTONE RETAINING WALL