Can you lay slabs on tarmac

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Reply to DIY. The Medway Handyman Contact options for registered users. Reply to The Medway Handyman. Steve Walker Contact options for registered users. Reply to Steve Walker. For the light use that you will get with a domestic driveway, a flexible laying method should suffice, unless the gradient is very steep or the area is prone to frequent flooding. Flexible paving means that the bedding layer is a soft material, usually sand, rather than a fluid material that sets.

Mark out the driveway edges, either with pegs and string or sand lines and Excavate The Area , allowing for an extra cm at the edge, which makes it easier to handle the blocks at the edge. The depth should be about cm, which allows for cm of sub-base layer, 4cm of bedding and then the block. If the block is deeper than 6cm you may need to dig a little deeper. It is possible to lay paving on top of an existing tarmac or concrete drive, but it must be in good condition, and washed down with a power washer.

Many DIY driveways will use hardcore made from a variety of materials, but if you want a driveway to last more than a few years care needs to be taken with this. Avoid too many house bricks in the hardcore and break it all up into pebble-sized chunks so that the sub-base can be properly levelled. Once the sub-base is down, spread the bedding layer of cm coarse grit sand also known as concrete sand or sharp sand. Dodgyrog , 9 Nov at PM , in forum: Building.

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