We’d like to replace laminate with ceramic tiles. I’m hoping for an educated guess what might be underneath/the floor type – 1890 to 1910 brick terrace, ground floor, no basement – (we don’t want to lift any laminate till we have to as it’s poor quality/poorly installed and will ruin). Depending on this, what are all the materials that might be needed for prep/installation (apart from tiles/grout!), as I have chemical allergies and will need to research the most suitable options before getting tradesman in. Many thanks for your time!