wall tiles

I’ve had an apex conservatory roof replaced with a flat warm roof. The tile hanging is being replaced. The builder has put a full tile length as the bottom row. My neighbour says this is incorrect, that there should be a row of shorter tiles beneath this and overlapping (from below) the joins...

Really hope someone can help. We’ve Moved to a house with fairly new cork wall tiles In the hall and up the stairs etc, and the family can’t live with them. I know they’re stuck down with glue and will be a terror to get off. I know they’re also quite a good insulator so it would be great to...