This will cost around 460 510 made up of.
Replacing roofing felt from inside loft.
Replacing just the felt that has physically broken can fix any leaking without the expense of work on the whole roof which usually requires scaffolding.
Is it feasable to restore the missing felt from the inside without removing roof tiles.
The rips are small enough that this should be sufficient if you run into a larger rip you may need to choose a different method or support the flashing as it may fall off due to its weight if it s larger than a few square inches.
Where wind driven rain is working under the roof and causing leaks then the felt will need to be replaced.
A section of the felt is missing from the inside of my pitched tiled roof.
The tiles are the fairly common large concrete type and the roof has 4 x2 rafters and standard 1 battens.
You can purchase self adhesive flashing which in small pieces should adhere well to the felt and should be suitable for the heat and cold experienced as roofing underlayment.
It s about a 2 mtr length and two rafter spaces wide.