Hi I'm going to do a 3.6m x 3.6m patio, I'll be using, new paving, but nothing fancy just plain 600mm x 50mm, with a mortar base of 40mm.So what depth should my sub base be.
I'm reading that the standard should be 75mm, just wondering though could I get away with 50mm, it isn't soft soil, and fairly untouched, apart from me digging out the weeds, there's lots of stones all sizes and shapes in the soil as well so I'm going to separate them and use as part of the sub base, though I will use proper mot type 1 as well, just trying to save on sub base if I can maybe squeeze by with just a tonne, or would the stones I have not mix well with the mot type 1.
I had a look on paving expert UK, and it seems that the usual depth is between 75 - 100 for patios, but it is a little vague in areas, and says that sometimes no sub base is needed, so I'm thinking then why not 50mm as I have clay soil, I'm a novice I've layed a small path, and done a couple of other jobs, but the patio will be more of a challenge, so I want to get it right and have it look nice, and as I said I'm using 600mm x 50mm, so I'm not sure because of this reason you can get away with a smaller depth of sub base, or its the total opposite because I'm using a heavier slab I need a thicker base, Thanks.