External tiling - Tile Advice

[Amos_38]

Heya,
Please could someone tell me the simplest way to tile over this. Prep work including best products (adhesive, primer, levelling compound) needed. Much appreciated

 

[J K Tiling Cornwall]

Hi, if the existing quarry tiles are solid I would prime with dilute SBR, leave to dry then give a slurry coat with a S1 adhesive mixed with SBR and water 50:50. Allow to go off then should be fine to tile with a exterior S1 cement based adhesive. Try to do on a cool day and aim for a complete bed coverage when setting the tiles 👍