Preston roofing guide
Damaged Roofing Felt Under Tiles in Preston
Roofing felt or underlay sits beneath the tiles or slates as a second line of protection. If rainwater is regularly reaching it, there is still a problem with the roof covering above.

Old felt can split
Nail holes and the eaves are common weak areas.
Inside patches are limited
A patch from below cannot recreate the way the original felt overlaps.
Repair from above where practical
If covering is lifted for another repair, damaged underlay can be dealt with properly at the same time.
Want the roof looked at?
Tell the roofer what you have seen and what the weather was like when it happened. If you can take a photograph safely from the ground, include one that shows the whole area of roof.
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