Do I need a dry verge?

[Bex]

Hello

 

Having my gable end re-rendered currently with external wall insulation beneath and the extra layering means there is very little roof tile overhang left.  They have placed a ‘capping ledge’ along the top of the render as it meets the roof edge, fitting just under the roof tile edge and assure me that that will be water tight.
 

i am asking them about a dry verge to make sure the top of the new render is fully sealed. Do you think this is necessary? Photos showing the white plastic capping - not yet rendered to the top - and my hand drawn diagram to explain the current ledge they have 

 

[Simplysimon]

53 minutes ago, Bex said:

Do you think this is necessary?

perhaps not, however, would suggest you do, i would, even if it just to get rid of the mortar. it would certainly look neater.

[Bex]

36 minutes ago, Simplysimon said:

perhaps not, however, would suggest you do, i would, even if it just to get rid of the mortar. it would certainly look neater.

thanks - good to know its not a deal breaker issue but that you would still advise