Digging footings - want to dig garden up and concrete it fully to apply decking tiles

Hello jarred, As a rule of thumb the higher the decking the deeper the foundations. If you really want to do build a sold foundation slab, you should: 1) Dig down 8 inches of the ground and level it out 2) Lay 3 inches of 'firmly' compacted hardcore (using a wacker plate) 3) Lay 5 inches of concrete, mixed with concrete strengthening fibers As an extra, you could also put in ribbed steel robs (rebar) or a steel mesh, with in the concrete. Hope the helps.

Hi, sounds like a wonder product! Are you sure you have to lay them on concrete? if so I would say a 100mm reinforced base would do the job, but it seems like a lot of work to make a base. Can you check with the manufacturer what they specify?

The easiest, cheapest and a better way for you would be to dig down and excavate 4" (100mm) and infill and compact with a waker plate some type one road stone (mod type1) it's £30 - £40 per ton but once compacted its worthy for any job such as this. I use this method as do a lot of other landscapers to lay patios and such like directly onto the the road stone Its cheaper and less labour intensive with the same results. It won't sink I promise as long as you have compacted it down at a depth or 4". Also make sure the finished surface on either road stone or concrete is 4" below the damp course level of your property if you going against the wall otherwise your be likely to endure damp. Hope this helps. Ben