Damaged Roofing Felt Under Tiles in Stockport
Roofing felt is a backup beneath the slates or tiles. If rainwater is regularly running across it, the outer covering above is still letting water through.

Older felt often fails around nails and eaves
Bituminous underlay becomes brittle with age and can tear where it has been stretched or punctured.
An inside patch has limits
A patch stuck beneath the felt may stop a drip temporarily, but it does not recreate the weather-lapped joints fitted from above.
Lift the covering when a proper repair is needed
If slates or tiles are already being removed, damaged underlay can be repaired in the correct overlap at the same time.
Need the roof inspected?
Describe where the problem is showing indoors, when it happens and any roof work already carried out nearby.
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