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We have removed a full peice of concrete slab out of the centre of a floor area (external) down to the mud. We’ve refilled with a few inches of hardcore as it was a raised floor area, and now are ready to refill with repair concrete (using SIKa LA repair concrete). . The rest of the floor did not have rebar/mesh was just created with concrete that had a lot of pebbles in. Can the repair concrete we have be used straight on top of the hardcore and adhere to the sides where the slab was cut out, or do we need to prepare the base of the area differently? Any advice would be gratefully received :)

Hi. We have a large cellar separated into different rooms and we'd like to convert the smaller room into a utility space for a wshiny machine and a toilet and sink (if possible). Not sure if tanking is needed, not sure where to start. Do we speak to a builder, a plumber or someone else. Thanks

I want to have an extension built on my house but I have no idea how to go about this. It will be ground floor extension. Can anybody help with the steps I need to make to make this happen? Thanks in advance