When it rains there is water pooling on the inside of my patio doors. It's always below a point where a door meets another door or where a door meets a fixed panel, as if it's coming in through the vertical joint between them. It does seem to disperse a few hours after rain has stopped but I have never seen this with similar doors in the past. I spoke to the manufacturer who said this is normal (provided it disperses) but I find it a bit disconcerting that doors aren't watertight and I'm just after a second opinion to put my mind at rest if anyone is kindly able to help.

