What is this surface? - Tile Advice

[DS_96]

Hi all

hope everyone is doing well. Have been asked to do to a quote for a ceramic kitchen splashback. The customer has sent me some photos of the area to be tiled. Hoping if anyone can help identify if the wall is plaster or render. I’ve asked the customer but he does not know.

any advice would be appreciated!

cheers
Dan.

 

[J K Tiling Cornwall]

Looking at the colour I'd say plaster, shouldn't make any difference if plaster or render. If using small ceramic tiles, just prime it first and use either a cement based or ready mixed adhesive. Cheers