Having no under felt unless there are missing slates will not cause rot.
Roof sarking felt.
The covering is of an age where it currently remains serviceable but its longevity is reasonably short.
Green treated ready for installation rough sawn sarking board is used in scotland for either roof covering underneath slates or also ideal for fences and fence boards.
Traditional bitumen sarking felt is the cheapest option for roofing underlay and is readily available.
Inc vat 75 25 ex vat 62 19.
Sort by torch on felt 4mm 1x10m.
Fakro eurotop s65 breather membrane 50x1 5mt.
Brought to you by http www ultimateha.
The bottom course of felt on a roof called sarking felt ensures that all of the rainwater is correctly channeled into the gutter by protecting the eaves from any wind driven rain.
It is slightly different from flat roofing felt as it includes a strong woven base but it can become brittle over time and can rot into the guttering where it has been exposed to sunlight.
Roofing felt is essential to ensure your outbuilding is ready for all weathers by providing a waterproof cover to the building s roof.
Severe weather condition may result in some water penetration through the aging concrete tiles not evident at this time.
Sarking felt is to prevent dust and draughts blowing under the slates.
If this felt is either incorrectly situated i e.
Ideal for an apex flat or pent roof shed felt and roofing membrane are durable and perfect for a newly built structure or to re cover existing roofing material.
It does fall off over the years.
The sarking felt is old and bitumen papered.
Product will differ from image slightly as it is rough sawn.
These type of linings are generally considered perished and not particularly effective.
Before using felt the slates were back pointed with sand lime cement and horse hair mix.
Roofing underlays are one of the most important elements of a roofing specification and choosing the right product is essential to ensuring the finished structure is weather resistant and provides years of trouble free service.
Obviously the roof is original ie never been re slated.
Trapped behind the guttering or if it is badly weathered it needs to be replaced.