I have built on concrete foundations using concrete block, 4" solid block and concrete commons a cavity wall for a conservatory. My concern is I have now come to in fill the conservatory base with hard core and realise the thresher of the con door will have no base to it as I didnt build a return in to the internal dwarf wall at the location of the door.
Do I have to rebuild were the door is going to be to allow the hard core to extend beyond the line of the internal dwarf wall?
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