I guess my primary concern is design related. There are no stains on the ceilings below. We do not do a good job on walk out decks in our area, period (North Florida). The list of typical errors is long, from improper membranes, poor design, to weight of flooring materials exceeding design limits (a possible concern here when you consider the weight of the bulk water after soaking into the finished flooring and mortar bed beneath). And yes, this is a mortar bed that is soft and failing. Multiple loose tiles were observed. I would suppose that a properly designed deck would include surface drainage for most if not all of the liquid and if "some water" gets through, the roof membrane would take care of the rest. In this case it appears that most of the water is soaking into the stone and mortar bed and then draining to the membrane and weeping out at the edge/drip flashing. In this case it just felt wrong, looked wrong and in the end, we have recommend design review with the architect and builder. On a recent multi-million dollar home we inspected that had decks over living spaces the architectural details did not include a roof membrane but specified two layers of ââ¬ÅDurockââ¬
