this might sound stupid but

[Perry]

Hi Ross,i'v read the replies and do none of it.
I pick where my line is going from first,ie.middle of room maybe.At one end i hammer in an obo nail,i then hook my chalk line onto it and go down room with it,when i line up with my other mark i snap it and there is my nice blue chalk line.
Hope this helps you a bit.
Joe
Hillhead Tiling

i have done both you carnt always get a nail in concrete 😛ete

 

[DHTiling]

VITRIFIED..........means GLASS LIKE.........fired to such a high temp that it

VITRIFIES............Many tiles are made this way including porcelains............

 

[floydyboy]

i have done both you carnt always get a nail in concrete 😛ete

sorry mate i thanked you by mistake:mad2:
i use an Hilti nail with a coller they are not cheap but will last you years acouple of cloutswith the hammer and it will penetrate the hardest of floors.
i have driven 1 of these into an engeneering brick and they are solid

 

[Gazzer]

This has just reminded me that years ago i had a smallish paint tin which had been filled with molten lead. The top of the can replaced and i painted the can red. It still had a wire handle so was easy to handle but easierto use than a box of tiles and didnt take much room up in the van.
No idea where that went so now i use a box of tiles too.

 

[hillhead]

buy a good hammer ,lol. i haven't lost yet.