Advice please guys, I need to raise floor level by 20mm over u/heated polished porcelain (very flat) about 45 sq mtrs. I will be laying a herringbone LVT 230mmx70mm floor on to it and need reccomendation as to decent boards that will do the job. Look forward to a response, Thanks, Stuart.
10/12.5mm backer board then prime and flexi compound or bag n bottle. I can supply the boards www.ufh-store.com