I'm planning on adding a conservatory in future.
I am thinking of a conservatory with no dwarf wall. UPVC/glass panels to the ground.
So I think a concrete pad base will be easiest.
I was planning to put a damp proof membrane down and up the wall of the house. The base will still be a step down from the kitchen door and be below the damp proof course of the house. I am planning to move my spa bath into the conservatory. What mix of concrete and thickness would be suitable? I would have thought 6 inches should be good enough.
My only other problem is that the drain for the kitchen sink will be within the conservatory. How best can I deal with this as I don't want smells from the drains back into the conservatory. The drain will also need to be available for excess flow from the spa bath.
Any suggestions or advice.