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Tape for Roof felt

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  • 09-02-2022 11:40pm
    #1
    omu
    Registered Users Posts: 117 ✭✭


    Hi, Can anybody recommend the best tape for repairing small holes in felt in attics. Id like to repair them as im hoping to insulate. Thanks



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    #2
    Deregos.
    Registered Users Posts: 582 ✭✭✭Deregos.


    Something like this would do it.

    https://www.screwfix.ie/p/everbuild-dpm-polythene-joint-tape-black-20m-x-75mm/713fr



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    #3
    listermint
    Registered Users Posts: 33,640 ✭✭✭✭listermint


    You need to be careful about what you are doing here. Bitumen roll has a lifecycle and degrades over time. Meaning if there's holes in it, it may be cause overall degradation of the material. I.e its dried out and become hard and inflexible. This means its on its way out. Insulating over this hides the problem and allows water ingress to penetrate behind the felt and behind your insulation as the felt further degrades.

    Depending on age and condition. Replacing all of the felt with a newer roofing membrane is more sensible.



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    #4
    goldenmick
    Registered Users Posts: 665 ✭✭✭goldenmick


    Any patching should really be done from the outside. You'll need to either get yourself up there or hire someone, and unhinge or push the slates/tiles back corresponding to the holes you need to repair. Of course - as mentioned in the previous post - felt is highly degradable over the years and this would only be a temporary measure. Finding where leaks originate is your priority... cracked or broken tiles/slates, ridges, loose flashings, etc. That should be addressed first.

    In over 20 years with my own roofing company it never ceased to amaze me how many people would opt for an amateur patch-up job when a professional would do the work properly. After all, your roof is the most important part of your home.



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    #5
    omu
    Registered Users Posts: 117 ✭✭omu


    Thanks all for the tips, will chat to a roofer before i try anything



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    #6
    youtheman
    Registered Users Posts: 1,268 ✭✭✭youtheman


    https://www.boards.ie/discussion/comment/118608791#Comment_118608791

    Totally agree with this. Was up in the attic of my parents 1970's bungalow trying to investigate the source of a damp patch on the ceiling. Thought it was a pipe leaking, then I felt the wind on my neck. Found a failed patch of the tar type felt. On a windy day the water was being blow under the tiles and into the attic. Looked around and saw many small hoes in the felt. Did a sample on a few locations and found that the felt was totally 'frangible' and brittle. Conclusion : the felt has a limited lifetime and the complete lot needs to be replaced.



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