The flashing is just a raised tarmac or something similar.
Zoom this pic...
The drain is a typical roof drain (raised protruding metal mesh) at the outer edge (under the railing)
So tiles can be laid on felt?
Would rubber paint (under tiles) be any use?
What sort of resin should...
I believe so yes. It was originally built over nothing more than a garage and an open porchway, so I don't the builders saw a need for true waterproofing.
Any suggestions?
I have a first floor balcony over a porchway. It's about 6m sq, with tiles on top of concrete. The water is leaking down through the concrete I believe and into the porch way.
I'm looking for a way to waterproof it.
Was thinking along the lines of a transparent resin to go straight over...