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By *riskygaz OP Man
over a year ago
birmingham |
recently had one made of standard slabs, I wanted to duplicate what they did to make the patio area a slab wider, I seen the trench they dug to drop the slabs into, but not sure if they used a 900mm slab standing on its head to drop in deep into the trench, or was it just a 600x600 slab, do you think just 300mm deep is going to hold, it's not going to be holding to much weight. ? |
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By *riskygaz OP Man
over a year ago
birmingham |
"Measure how much slab is visable if you saw the trench they dug you should know I would say yes 300mm is enough if the sail is packed down hard."
only had a quick glance at the trench, I don't think it was deep enough to have taken around 600mm.
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By (user no longer on site)
over a year ago
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Put some lean mix in bottom of trench first see how much slab is above ground .double that putting the slab on end then lean mix both sides of upended slab to just below grass or finished level . Use dick cutter if necessary to get required slab measurement . You can always use the slab of cuts for infill to bring internal surface up to required level then lay on a sharp sand mortar mix . Job done |
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400mm below ground 200mm above ground stops it pushing out at top when your compacting the surface
the next size up is 3' x 2'
think yourself lucky that you dont have stone flags used as a boundary wall like ours as there 3ft in ground 2ft above |
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