what thickness plywood for sub floor for ceramic floor tiles

evergreen

My husband is going to lay ceramic floor tiles to the kitchen floor. He needs to put plywood down first, but what depth of plywood should he use? Would be grateful for advice on this.

Thanks.

andyhop

BS state 15mm for overboarding

You could use 6mm hardibacker cement board

We would normally remove existing floor and replace with 25mm or overboard in 12mm then s2 adhesive(Mapei Keraquick and latex)

evergreen

Thanks andyhop.