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  • Expected service life of pitched roof membrane undr tiles?

    From David@wibble@btinternet.com to uk.d-i-y on Wed Jun 24 12:42:22 2026
    From Newsgroup: uk.d-i-y

    Started off down a rabbit hole about roofing membranes.

    The ever relisble Internet aided by AI suggested that the service life for
    tar paper was about 15 years. and a modern roofing membrane was 20-25
    years.

    This seems unreasonable to me.

    Strip off the roof tiles and replace the membrane every 20-25 years?

    I don't know anywhere that does this.

    I do wonder if AI is mixing up the durability of a felt flat roof with a pitched roof with tiles.

    Has anyone had to refurbish a pitched roof in this manner?

    As an indication, I think out 1930s semi is still on the original tar
    paper (or whatever).

    Cheers




    Dave R
    --
    AMD FX-6300 in GA-990X-Gaming SLI-CF running Windows 10 x64

    --
    This email has been checked for viruses by Avast antivirus software. www.avast.com
    --- Synchronet 3.22a-Linux NewsLink 1.2
  • From The Natural Philosopher@tnp@invalid.invalid to uk.d-i-y on Wed Jun 24 13:47:53 2026
    From Newsgroup: uk.d-i-y

    On 24/06/2026 13:42, David wrote:
    Started off down a rabbit hole about roofing membranes.

    The ever relisble Internet aided by AI suggested that the service life for tar paper was about 15 years. and a modern roofing membrane was 20-25
    years.

    This seems unreasonable to me.

    Strip off the roof tiles and replace the membrane every 20-25 years?

    I don't know anywhere that does this.

    I do wonder if AI is mixing up the durability of a felt flat roof with a pitched roof with tiles.

    Has anyone had to refurbish a pitched roof in this manner?

    As an indication, I think out 1930s semi is still on the original tar
    paper (or whatever).

    Cheers


    Tar paper *in sunlight* lasts 20 years max.
    Under roof tiles its probably a lot longer than that.
    --
    I would rather have questions that cannot be answered...
    ...than to have answers that cannot be questioned

    Richard Feynman



    --- Synchronet 3.22a-Linux NewsLink 1.2
  • From Andy Burns@usenet@andyburns.uk to uk.d-i-y on Wed Jun 24 13:54:14 2026
    From Newsgroup: uk.d-i-y

    David wrote:

    Started off down a rabbit hole about roofing membranes.

    The ever relisble Internet aided by AI suggested that the service life for tar paper was about 15 years. and a modern roofing membrane was 20-25
    years.

    This seems unreasonable to me.
    My late '60s house has a sort of hessian/tar roll in place between the
    rafters and tiles, it's drooped a bit over the years, but not gone
    brittle, never noticed any rain having got in ... no thoughts of
    touching it, don't think any house in the street has been re-roofed
    (barring work on extensions).


    --- Synchronet 3.22a-Linux NewsLink 1.2
  • From Abandoned Trolley@that.bloke@microsoft.com to uk.d-i-y on Wed Jun 24 14:43:56 2026
    From Newsgroup: uk.d-i-y

    On 24/06/2026 13:42, David wrote:
    Started off down a rabbit hole about roofing membranes.

    The ever relisble Internet aided by AI suggested that the service life for tar paper was about 15 years. and a modern roofing membrane was 20-25
    years.

    This seems unreasonable to me.

    Strip off the roof tiles and replace the membrane every 20-25 years?

    I don't know anywhere that does this.

    I do wonder if AI is mixing up the durability of a felt flat roof with a pitched roof with tiles.

    Has anyone had to refurbish a pitched roof in this manner?

    As an indication, I think out 1930s semi is still on the original tar
    paper (or whatever).

    Cheers




    Dave R




    I have an old house with part of the roof covered in aged peg tiles.
    They were relaid there about 35 years ago on some "tar paper" roofing
    felt which appears from below to still be in good condition - and watertight --- Synchronet 3.22a-Linux NewsLink 1.2
  • From wasbit@wasbit@invalid.com to uk.d-i-y on Thu Jun 25 09:23:56 2026
    From Newsgroup: uk.d-i-y

    On 24/06/2026 13:42, David wrote:
    Started off down a rabbit hole about roofing membranes.

    The ever relisble Internet aided by AI suggested that the service life for tar paper was about 15 years. and a modern roofing membrane was 20-25
    years.

    This seems unreasonable to me.

    Strip off the roof tiles and replace the membrane every 20-25 years?

    I don't know anywhere that does this.

    I do wonder if AI is mixing up the durability of a felt flat roof with a pitched roof with tiles.

    Has anyone had to refurbish a pitched roof in this manner?

    As an indication, I think out 1930s semi is still on the original tar
    paper (or whatever).


    The sarking felt on our roof was still good after 60 years.
    --
    Regards
    wasbit
    --- Synchronet 3.22a-Linux NewsLink 1.2