On Sep 11, 4:25*pm, "Steve" wrote:
"Dave Plowman (News)" wrote in ... In article ,
* Steve wrote:

.
snip I've noticed there are small gaps, around a millimetre, at the edges of
some tiles - the mortar has separated from the tile edges. *They may

.
snip
. Cement mortar is a poor material for ridge tiles - as the roof always
moves relative to them. And the stronger you make it the worse the
problem. Use a good non setting mastic to fill any gaps. If doing again
use lime mortar.

Thank Dave. *Can you suggest a source for non setting mastic? *I can't see
any on Screwfix or Toolstation.

I wasnt sure whether to mention bitumen


NT