Hi guys. I'm looking for a DIY solution to a problem we have at the back of our house. The back patio has a floor which is the ugliest thing ever. It is half concrete, which is like a very thin slab, only about 20mm thick at best. It is cracked in places. Also there are numerous repairs and patched bits. The rest is some kind of hideous looking thin concrete paver. These appear to have been originally in three colours, and there are newer plain concrete ones as well. Some of these have sunken...

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