Quote:
Originally Posted by Dalmatiansoap
But if tiles are glued as in pools or bath tubs your pots can allways be well watered by misting only?
Well after all this is just an idea 
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Yes, these are good ideas!
If a work surface is important, then glued tiles are worth considering. This propagation table has side walls and a hinged top. It is not a work surface.
I will have cuttings in the pots and the electronic leaf is to prevent over-watering. The media in the pots needs to be less than moist but not dry. The "bed" they are sitting on has drainage because it is poor for the pots to sit in water. Having the pots sit directly on tiles without warm humidity rising underneath could cause them to dry out too fast -- I don't know. It is something for me to experiment with. I believe it is a good idea to have the cables in horticulture sand and allow the run-off water to be heated -- thus taking advantage of the heat capacity of water and heat-transfer by evaporation.