billytheghillie Posted January 12, 2023 Report Share Posted January 12, 2023 I am going to lay 36 2x2 slabs, 12ftx12ft area, questions, How deep do i dig, What depth of type 1 should it be, How much roughly type 1 will i need? Many Thanks. Quote Link to comment Share on other sites More sharing options...
amateur Posted January 12, 2023 Report Share Posted January 12, 2023 The first question is:- How much weight will they have to withstand? Quote Link to comment Share on other sites More sharing options...
billytheghillie Posted January 12, 2023 Author Report Share Posted January 12, 2023 6 minutes ago, amateur said: The first question is:- How much weight will they have to withstand? Garden shed Quote Link to comment Share on other sites More sharing options...
Good shot? Posted January 12, 2023 Report Share Posted January 12, 2023 https://www.primaryaggregates.co.uk/aggregates/aggregates-calculator should give you the quantity required once you are advised of the depth. Quote Link to comment Share on other sites More sharing options...
JKD Posted January 12, 2023 Report Share Posted January 12, 2023 It depends on the ground conditions as to how a shed base is created. Using Type 1 could be an unnecessary cost. I usually just lay the slabs on an evenly prepared area (that has been dug out carefully so as not to leave much loose earth) using a mortar consisting of 3 parts sharp sand, 1 part soft/building sand, 1 part cement. Mix to a not too wet consistency, with a splash of plasticiser added. And a solid bed of mortar is best,,,, spotting just creates future problems. This is usually quite sufficient for a shed/workshop base. If you are going to use Type 1, I'd recommend a depth of 100mm and compact it really well. You'd need approximately 2 tons. A mortar (as above) thickness of approximately 30-40mm. HTH. Quote Link to comment Share on other sites More sharing options...
Walker570 Posted January 12, 2023 Report Share Posted January 12, 2023 Afraid I can only offer my own experience. I had an area of slabs laid as a patio approx 12 ft by 30ft and had professionals lay it. They put down a layer of substrate which was a good nine inches after tamping down with vibrator. Those slabs have never moved in the twelve years they have been down. If I was going to do the job myself for a shed base I would think of a number and add a bit, can't go wrong in putting too much in my mind. If the jobs worth doing it's worth doing well. Bear in mind that the weight of the shed is going to be transfered down its walls so be sure to make a good job in those areas. JKD covers it well in my opinion and I am no expert. Quote Link to comment Share on other sites More sharing options...
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