You can get dry verge systems that replace the mortar with a sort of bend over edge in plastic or tile.
Roof edge mortar repair.
Depending on how the roofs join you may have to cut a slot to work it in far enough.
If there are repairs to be done on the roof replace worn out tiles and make sure the entire surface is covered.
You can buy sealant in several colours to match the mortar if it is to be left unpainted.
I would then probably coat the entire point with a waterproof seal.
Remove loose and worn out roofing material as well.
Concrete tile roof repair can be a very challenging process.
Use a stiff brush and wipe away debris particles and dirt from the surface.
If possible i intend to fill the cracks and seal the gaps.
Begin by removing the shingles down to the wood sheathing and slip a strip of adhesive ice and water barrier available where roofing repair products are sold under the soffit main roof joint.
Repair small cracks small cracks in the mortar of the verge can be quickly and easily fixed by using a roof and gutter sealant.
Step 3 prepare the surface.
By avoiding some typical mistakes you should be able to ensure that your home remains protected from the elements.
Although concrete tiled roofs are the most durable type of roof available they are still likely to break.
Use a cold chisel and club hammer to get rid of worn out and damaged mortar.