On 2 Apr, 13:39, "Dave Plowman (News)" wrote:
In article ,
DIY secret wrote:

It's not urgent unless the roof starts to leak or the tiles start
slipping down. 80 notes is a bargain, especially if he does a good job
and uses a strong mortar mix.

IMHO that's the last thing in the world you want as there will inevitably
be movement between ridge tile and roof. A decent mastic or even perhaps a
lime mortar will be better.

Aha dissent !

Is there a mastic suitable ? I presume you'd need a ****-load to do
the while ridge ?