Item 656632 model 0903000.
Roof felt repair under tiles.
Two layers of astm 30 pound asphalt impregnated felt is the minimum you should use under tile and should last 20 to 30 years.
Fixing a tiled roof will help fend off any leaks that result from slipped roof tiles.
If your roof is leaking it is not because of faulty under felt.
To replace a small section of roofing felt involves stripping the tiles from the roof and replacing felt between two joists.
Where wind driven rain is working under the roof and causing leaks then the felt will need to be replaced.
It is because you have faulty tiles somewhere on the roof.
This will cost around 460 510 made up of.
Gaf shingle mate 36 in x 144 ft 400 sq ft felt roof underlayment.
Roofing felt is a layer of tar paper installed beneath the shingles to provide a backup waterproof membrane in case of leakage.
It would be far cheaper to fix the faulty tiles than to re felt the roof.
Having a layer of roof felt will block the resin preventing it from staining or compromising your roof shingles.
The cost of replacing roof felt under tiles will be included in the overall tiled roof roof repair costs.