I’ve used this several times; http://www.ruberoid.co.uk/pages/rub...product_page/default.aspx?CatID=57&ProdID=161
If you have 60mm depth over the original deck & assuming it’s not moving around, I would consider laying a complete new screed with integral DPM under & extending up the walls & then tile directly over that; job done. I assume there is a DPC in the brick walls?
If you have 60mm depth over the original deck & assuming it’s not moving around, I would consider laying a complete new screed with integral DPM under & extending up the walls & then tile directly over that; job done. I assume there is a DPC in the brick walls?