roof verge

We had our verge mortar replaced one month ago. The roofer took off all the tiles, replaced the under cloak, and then put new mortar down and replaced the tiles. Would anyone have any ideas of what went wrong? The mortar has come away from the under cloak along its full length, and a few...

Hi there, Four years ago I replaced about about two metres of roof verge which I have to say is still as solid as a rock. As a complete novice the first website I visited (diy-extra co uk) suggest 4:1 sharp sand to cement. That's the mix I used as I assumed, in my naivety, the mix had been...