Since I started this thread, I decided to pull up the whole slab and start again. So now the underfloor is 50mm insulation, DPM, 5-6 inches of concrete and 3 of screed.
I'm planning to start laying the blocks in two weeks time when the screed has cured fully.
The one thing I'm not sure about yet is the join between the wood blocks and the kitchen slate floor. Is it best just to butt the wood right up against the slate (which does not have perfectly straight edges) or leave a small gap and fill with something?
I'm planning to start laying the blocks in two weeks time when the screed has cured fully.
The one thing I'm not sure about yet is the join between the wood blocks and the kitchen slate floor. Is it best just to butt the wood right up against the slate (which does not have perfectly straight edges) or leave a small gap and fill with something?