I just thought it would be quicker with ct 1 . Blob on tile , stick - repeat x 1000000
Wasn’t sure if tile adhesive would take to osb ...
So this type of thing
https://www.crowntiles.co.uk/cubics-grey-porcelain-wall-tiles.html?gclid=CjwKCAjwu5CDBhB9EiwA0w6sLfBL8rzaqifupt5BRQ-Ngtt87d3vDtROzBLs8DZSC3Zz8cgSI1s0dxoCkoAQAvD_BwE
I presume I can place them tight to each so no grouting ! ?