Where do I start!!! We brought our little bungalow well chuffed with it until winter came.... I started having condensation really bad on my windows and under the bay window my wall was wet, we used a dehumidifier. we got the floor broads up and we have a 4ft drop and it was full of builders rubble bricks sand we moved this out of the bay has was told its bad to be in there plus taking like a sponge and drawing the water to it, we then put down a couple of inch bed on cement. We gave the wall the 1st coat of tanking in the Bay Area and rained heavy that night we still have floor broads up and we checked it water was coming threw I was gutted really thought this tank would be the answer to our problems we had been having.. We are going to do the tanking again 2nd coat.. Has anyone had this problem and how did you get around it? Any help would be very much appreciated has at the moment I'm at my wits end with it now.. I really thought it was to do with condensation and air flow until I saw the water run in ... My property is a 1930's bungalow with a aco drain fitted outside the property.