You can fix tears in your roofing felt by putting a patch of new felt underneath.
How to repair roof felt in loft.
Where wind driven rain is working under the roof and causing leaks then the felt will need to be replaced.
Make sure the caulk is rated for the temperatures and apply it liberally so you don t create a water pocket.
But make sure you check the instructions and leave enough time for the sealant to dry before sticking the new patch down.
Alternately get more roofing felt and a tube of roofing caulk and glue felt patches over the rips with the caulk.
According to the building expert in the telegraph the lining is only to keep the house interior dry until the tilers have.
This will cost around 460 510 made up of.
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.
The lead is finally fixed in place with copper nails hidden under the overlaps.
So check the roof for any broken or loose tiles.
The felt is a secondary water barrier in case a tile is broken ect.
You can use flashing tape to fix the holes in the underfelt.