This is because the roof repairer did not know the basics of how a roof tile functions.
How to seal cracked roof tiles.
The unglazed tile exposed by the crack absorbs water that isn t easily wiped dry so run a hair dryer over it for about 15 minutes to.
However i have seen so many broken roof tiles repaired with silicone and still leak.
Well a properly executed silicone repair can be effective as a temporary or even permanent solution to this problem.
Small cracks or holes small cracks and holes can be repaired by filling the defect with plastic roofing cement.
There were a number of cracked concrete roof tiles that i observed.
Clean the surface of the tile with a rag soaked.
Broken roof tile is pried out and removed so that a new replacement can be slipped in beneath the course above it.
The buyer asked me what type of repairs needed to be performed and i told him the only acceptable repairs according to the roof tile manufacturers was to replace the broken tiles and that gluing them back together was considered only a temporary patch the homeowner.
Apply it directly on top of the cracked area and push it down into the crack with your finger or a putty knife thus capping the void and the leak.
Rinse the tile with clean water and dry with a clean towel.
However as a short term solution where you do not have access to a fresh tile you can repair the cracked tile with roofing cement or silicone caulking.