Its the tile size. Standard concrete & clays are 10.5" x 6.5" but are commonly referred to as 10 x 6's.( used to be a director of a building company and we did a lot of roofing)
Rgds
Nick
Edited to add. What I would be more interested in is the fact tat they are removing above where the leak shows which may be a red herring, leaks have a funny way of travelling around under tiles and above felt and the water may be getting in, in a completely different area!!
Its the tile size. Standard concrete & clays are 10.5" x 6.5" but are commonly referred to as 10 x 6's.( used to be a director of a building company and we did a lot of roofing)
Rgds
Nick
Edited to add. What I would be more interested in is the fact tat they are removing above where the leak shows which may be a red herring, leaks have a funny way of travelling around under tiles and above felt and the water may be getting in, in a completely different area!!
