Where wind driven rain is working under the roof and causing leaks then the felt will need to be replaced.
How to repair roof felt in loft.
This will cost around 460 510 made up of.
The lead is finally fixed in place with copper nails hidden under the overlaps.
However this isnt the only problem.
A thin layer of fibrous material is inserted between the lead and the valley board such as breathable membrane roofing felt but not mineral felt.
You can fix tears in your roofing felt by putting a patch of new felt underneath.
So check the roof for any broken or loose tiles.
You can use flashing tape to fix the holes in the underfelt.
Alternately get more roofing felt and a tube of roofing caulk and glue felt patches over the rips with the caulk.
Make sure the caulk is rated for the temperatures and apply it liberally so you don t create a water pocket.
To replace a small section of roofing felt involves stripping the tiles from the roof and replacing felt between two joists.
The felt is a secondary water barrier in case a tile is broken ect.