I have built 4 stone pillars (only 2 course each) ontop of 18x18x4" concrete pads.
The pillars are to provide support under joists on a decking area .....
Additional supports in readiness for HotTub going on the decking.
The joists are already in place ... so I can't remove, just need to 'fill the gap' to provide load bearing.
There is a gap of about 1.5"-2" between top of pillars and underside of joist ...... which I need to fill with a mix.
I had thought about Grano (3:1) but can't find it anywhere local to me.
So I could use builders sand (3:1) or go buy some sharp sand
or even some 10mm pea gravel and do a 1:2:3 concrete mix
Thoughts ?
The pillars are to provide support under joists on a decking area .....
Additional supports in readiness for HotTub going on the decking.
The joists are already in place ... so I can't remove, just need to 'fill the gap' to provide load bearing.
There is a gap of about 1.5"-2" between top of pillars and underside of joist ...... which I need to fill with a mix.
I had thought about Grano (3:1) but can't find it anywhere local to me.
So I could use builders sand (3:1) or go buy some sharp sand
or even some 10mm pea gravel and do a 1:2:3 concrete mix
Thoughts ?
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