Hi, I’m renovating my new home and pulled up the flooring to reveal a gap between the concrete floor and front door sweep. It goes through to outside, as I can feel a draught and seen bugs crawl through, so I’d like to patch it before laying new floor. I thought to fill it with Ardit rapid repair mortar, but I understand that a (costly) damp proof membrane is required before applying the mortar on direct to earth sub floor. Could you please let me know my options? Thanks for your time.
