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Step 3. Install drainage, add capping and finish
Step 3. Install drainage, add capping and finish
Reader's Digest

Position geotech filter cloth behind the wall and fold it over the sleepers. Install 20m of 100mm agflo pipe with clear exits at the ends then cover with 20mm gravel to 300mm deep, folding the cloth back to separate the drainage and backfill.

Next, square cut and mitre the capping, apply construction adhesive to the ends and secure to the sleepers with 75mm x 14g galvanised bugle screws then use a router with a roundover bit to remove splinters and trim the edges. Apply two coats of decking stain.

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