leethedog 3,071 Posted March 23, 2017 Report Share Posted March 23, 2017 Right lads I gotta put a slab down for my lads conservatory the slab needs to be 4m x2.5 m and a foot thick how much ballast and cement for it Cheers in advance lee 7 Quote Link to post Share on other sites
Welsh_red 4,690 Posted March 23, 2017 Report Share Posted March 23, 2017 Theirs good concrete calculators online that tell you how much you need Quote Link to post Share on other sites
leethedog 3,071 Posted March 23, 2017 Author Report Share Posted March 23, 2017 Yeah all I can find is one that is for ready mix Quote Link to post Share on other sites
leegreen 2,182 Posted March 23, 2017 Report Share Posted March 23, 2017 You need 3m2 of concrete. Order in one go and save on the back ache. Not sure on the price per m2 but I recon about £100 or there abouts. The best thing about ready mix or mix as you go is that the consistency is constant. 3 1 Quote Link to post Share on other sites
Welsh_red 4,690 Posted March 23, 2017 Report Share Posted March 23, 2017 I'd go ready mix every time if i could . So much quicker and less back breaking If you want to do it yourself look here http://source4me.co.uk/calculate_concrete_mix.php Quote Link to post Share on other sites
leegreen 2,182 Posted March 23, 2017 Report Share Posted March 23, 2017 Or 1 metric tonne of ballast to 10 bags of dust, that'd give you 1:5 mix. Quote Link to post Share on other sites
leegreen 2,182 Posted March 23, 2017 Report Share Posted March 23, 2017 1.76 tonnes per m2. 1 Quote Link to post Share on other sites
jiggy 3,209 Posted March 23, 2017 Report Share Posted March 23, 2017 (edited) 6 tonne and between 30 and 36 bags cement depending on strength that will make 3 cubic meters 4m x 2.5m x .3m Edited March 23, 2017 by jiggy Quote Link to post Share on other sites
leegreen 2,182 Posted March 23, 2017 Report Share Posted March 23, 2017 Hope you've got a mixer 1 Quote Link to post Share on other sites
hjckcff 1,738 Posted March 23, 2017 Report Share Posted March 23, 2017 a foot thick. for a conservatory seems a bit ott. could you not cut the depth of the slab and deepen for founds. Quote Link to post Share on other sites
jiggy 3,209 Posted March 23, 2017 Report Share Posted March 23, 2017 It would be cheaper to order readymix and less work 70 euro per cubic meter 1 Quote Link to post Share on other sites
leethedog 3,071 Posted March 23, 2017 Author Report Share Posted March 23, 2017 Unfortunately ready mix isn't an option would need to pump it 100 ft coz they won't wait about for you to barrow it Quote Link to post Share on other sites
wilbur foxhound 480 Posted March 23, 2017 Report Share Posted March 23, 2017 Why does it have to be a foot thick,I think the concrete on a motorway is only nine inches thick 1 Quote Link to post Share on other sites
tank34 2,364 Posted March 23, 2017 Report Share Posted March 23, 2017 Ready mix lads do all the barrow work for you down my way Quote Link to post Share on other sites
leethedog 3,071 Posted March 23, 2017 Author Report Share Posted March 23, 2017 Why does it have to be a foot thick,I think the concrete on a motorway is only nine inches thick just guessing that should be plenty Quote Link to post Share on other sites
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