LeanTwo Posted June 4, 2017 Share Posted June 4, 2017 I'm constructing a lean-to extension that will cover about 13.5 square meters to my existing kitchen/diner. The total length of the foundation, allowing for a 100 mm shoulder, is about 9.5 meters. I'm looking at about 2.75 cubic meters of concrete. (9.5 X 0.65 X 0.25m) I looked up a concrete mix on the internet and the suggestion was: 1 part cement 2 parts sharp sand 4 parts gravel. Does this sound right? I had other ratios result from my search as well! My builder's merchant also sells a mix of sand and gravel. This sounds like an easier option than separate deliveries of sand and gravel? I hope to mix and lay this in one day, with two of us working. Does this sound achievable? Link to comment Share on other sites More sharing options...
Vijay Posted June 4, 2017 Share Posted June 4, 2017 Ballast would be easier but I don't know how it compares price wise to getting the parts individually. I personally would get ballast if I was mixing myself Link to comment Share on other sites More sharing options...
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